Lab058: characterize symbol quality in controlled ABAB recording
This commit is contained in:
LittleSam129
549
experiments/lab058_abab_symbol_quality.py
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549
experiments/lab058_abab_symbol_quality.py
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"""Lab058: офлайн-анализ качества BPSK-символов записи Lab056."""
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from __future__ import annotations
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import csv
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import hashlib
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import json
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from pathlib import Path
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import sys
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if __package__ in (None, ""):
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sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
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import matplotlib.pyplot as plt
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import numpy as np
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from scipy import signal
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from experiments import lab043_pluto_to_rtlsdr as shaping
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from experiments import lab057_symbol_diagnosis as lab057
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PROJECT_ROOT = Path(__file__).resolve().parents[1]
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RAW = PROJECT_ROOT / "data/raw/lab056"
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LAB056 = PROJECT_ROOT / "data/processed/lab056"
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OUTPUT = PROJECT_ROOT / "data/processed/lab058"
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TX_PATH = RAW / "tx_abab.cs8"
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RX_PATH = RAW / "rx_stream.cs8"
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TX_SHA256 = "5b34bbe1a8e6d037d2d6d367a74e9eb84e8940db7da61600ffaa7f7497d4f600"
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RX_SHA256 = "e336dd653fa554058052fcf851e9f2462f66b8cf7c710815ca2b9a09ffc23ad4"
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SAMPLE_RATE = 8_000_000
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CARRIER_HZ = 50_000
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TILE_COUNT = 64
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TIMING_GRID = np.linspace(-0.5, 0.5, 33)
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ISI_OFFSETS = np.arange(-5, 6)
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AWGN_SEED = 5801
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AWGN_COMPLEX_VARIANCE = 400.0
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EXPECTED_ENERGY_DIFFERENCE_DB = -13.870505
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def sha256(path: Path) -> str:
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digest = hashlib.sha256()
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with path.open("rb") as stream:
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for block in iter(lambda: stream.read(1024 * 1024), b""):
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digest.update(block)
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return digest.hexdigest()
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class Cs8File:
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"""Read-only interleaved signed-I/Q file."""
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def __init__(self, path: Path):
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self.path = path
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self.raw = np.memmap(path, np.int8, mode="r")
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if self.raw.size % 2:
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raise ValueError(f"Нечётный размер cs8: {path}")
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self.size = self.raw.size // 2
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def read(self, start: int, count: int) -> np.ndarray:
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if start < 0 or count < 0 or start + count > self.size:
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raise ValueError(f"Окно вне {self.path}: {start}+{count}>{self.size}")
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values = self.raw[2 * start:2 * (start + count)]
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return values[::2].astype(np.float32) + 1j * values[1::2].astype(np.float32)
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def expected_symbols(symbol_rate: int) -> np.ndarray:
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count = 4096 * (symbol_rate // 20_000)
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bits = shaping.pilot_prbs7(count)
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if not np.array_equal(bits[:1280], lab057.PREAMBLE):
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raise AssertionError("PRBS Lab056 не совпала со штатной преамбулой")
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return 2.0 * bits.astype(np.float64) - 1.0
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def tile_ids(count: int) -> np.ndarray:
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return np.minimum(np.arange(count, dtype=np.int64) * TILE_COUNT // count, TILE_COUNT - 1)
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def training_mask(count: int) -> np.ndarray:
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return tile_ids(count) % 2 == 0
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def guarded_tile_masks(count: int, margin_symbols: int = 8) -> tuple[np.ndarray, np.ndarray]:
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"""Return disjoint even/odd tile interiors outside FIR/interpolation support."""
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train = np.zeros(count, dtype=bool)
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validation = np.zeros(count, dtype=bool)
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for identifier in range(TILE_COUNT):
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low = (identifier * count + TILE_COUNT - 1) // TILE_COUNT + margin_symbols
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high = ((identifier + 1) * count + TILE_COUNT - 1) // TILE_COUNT - margin_symbols
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if low >= high:
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raise ValueError("Плитка слишком коротка для защитного края")
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(train if identifier % 2 == 0 else validation)[low:high] = True
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return train, validation
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def oracle_matched_filter(values: np.ndarray, taps: np.ndarray,
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symbol_rate: int, symbol_count: int) -> np.ndarray:
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"""Matched filter whose DC nuisance estimate reads only guarded TRAIN intervals."""
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samples_per_symbol = SAMPLE_RATE // symbol_rate
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train, _ = guarded_tile_masks(symbol_count)
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centers = (16 + 5) * samples_per_symbol + np.arange(symbol_count) * samples_per_symbol
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raw_train = np.zeros(len(values), dtype=bool)
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for index in np.flatnonzero(train):
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raw_train[centers[index]:centers[index] + samples_per_symbol] = True
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dc = np.mean(values[raw_train])
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indexes = np.arange(len(values))
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baseband = (values - dc) * np.exp(-2j * np.pi * CARRIER_HZ * indexes / SAMPLE_RATE)
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return signal.oaconvolve(baseband, taps, mode="full")
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def fit_cfo_gain(samples: np.ndarray, expected: np.ndarray, indexes: np.ndarray,
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symbol_rate: int, total_symbol_count: int | None = None) -> tuple[float, complex, float]:
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"""Fit one CFO and h using only the supplied indexes."""
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corrected_sign = samples * expected
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if total_symbol_count is None:
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total_symbol_count = len(expected)
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identifiers = np.minimum(indexes * TILE_COUNT // total_symbol_count, TILE_COUNT - 1)
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block_values, block_times = [], []
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for identifier in np.unique(identifiers):
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select = identifiers == identifier
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value = np.mean(corrected_sign[select])
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if abs(value) > 0:
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block_values.append(value)
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block_times.append(float(np.mean((indexes[select] + 0.5) / symbol_rate)))
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block_values = np.asarray(block_values)
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block_times = np.asarray(block_times)
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if len(block_times) == 0:
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return 0.0, 0j, 0.0
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phase = np.unwrap(np.angle(block_values))
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weights = np.maximum(abs(block_values), 1e-12)
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matrix = np.column_stack((np.ones(len(block_times)), block_times - block_times[0]))
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coefficients = np.linalg.lstsq(matrix * weights[:, None], phase * weights, rcond=None)[0]
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cfo_hz = float(coefficients[1] / (2 * np.pi))
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times = (indexes + 0.5) / symbol_rate
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h = complex(np.mean(corrected_sign * np.exp(-2j * np.pi * cfo_hz * times)))
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coherence = float(abs(h) ** 2 / max(float(np.mean(abs(samples) ** 2)), 1e-30))
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return cfo_hz, h, coherence
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def oracle_estimate(matched: np.ndarray, nominal: int, expected: np.ndarray,
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symbol_rate: int) -> dict:
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samples_per_symbol = SAMPLE_RATE // symbol_rate
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train = np.flatnonzero(guarded_tile_masks(len(expected))[0])
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stride = max(1, len(train) // 8192)
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probe = train[::stride]
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candidates = []
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for fraction in TIMING_GRID:
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positions = nominal + fraction * samples_per_symbol + probe * samples_per_symbol
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samples = lab057.interpolate(matched, positions)
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cfo_hz, h, coherence = fit_cfo_gain(samples, expected[probe], probe, symbol_rate,
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len(expected))
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candidates.append((coherence, float(fraction), cfo_hz, h))
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_, fraction, _, _ = max(candidates, key=lambda row: row[0])
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positions = nominal + fraction * samples_per_symbol + np.arange(len(expected)) * samples_per_symbol
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symbols = lab057.interpolate(matched, positions)
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train_samples = symbols[train]
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cfo_hz, h, coherence = fit_cfo_gain(train_samples, expected[train], train, symbol_rate,
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len(expected))
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return {"timing_fraction": fraction, "timing_samples": fraction * samples_per_symbol,
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"cfo_hz": cfo_hz, "h": h, "train_coherence": coherence,
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"symbols": symbols}
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def receiver_like(frontend: lab057.Frontend, values: np.ndarray,
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expected: np.ndarray) -> dict:
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window = frontend.extract(values, len(expected))
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if not window.passed:
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raise RuntimeError(f"Штатное извлечение не выполнено: {window.reason}")
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matched = frontend.filter(values)
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start = frontend.nominal + window.timing_offset_samples
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symbols = matched[start:start + len(expected) * frontend.samples_per_symbol:
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frontend.samples_per_symbol].astype(np.complex128)
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carrier = window.carrier
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h = carrier["abs_h"] * np.exp(1j * carrier["phase_rad"])
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return {"timing_fraction": window.timing_offset_samples / frontend.samples_per_symbol,
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"timing_samples": float(window.timing_offset_samples),
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"cfo_hz": float(carrier["cfo_hz"]), "h": complex(h),
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"train_coherence": None, "symbols": symbols, "matched": matched}
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def evaluate(estimate: dict, expected: np.ndarray, symbol_rate: int,
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selected: np.ndarray) -> dict:
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indexes = np.flatnonzero(selected)
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symbols = estimate["symbols"][selected]
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truth = expected[selected]
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times = (indexes + 0.5) / symbol_rate
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derotated = symbols * np.exp(-2j * np.pi * estimate["cfo_hz"] * times)
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h = estimate["h"]
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normalized = derotated / h
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predicted = h * truth
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residual = derotated - predicted
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decisions = normalized.real >= 0
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bits = truth > 0
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errors = int(np.count_nonzero(decisions != bits))
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matched_power = float(np.mean(abs(predicted) ** 2))
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residual_power = float(np.mean(abs(residual) ** 2))
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plus, minus = normalized.real[truth > 0], normalized.real[truth < 0]
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pooled = float(np.sqrt((np.var(plus) + np.var(minus)) / 2))
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separation = (float("inf") if pooled == 0 else
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float((np.mean(plus) - np.mean(minus)) / pooled))
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margin = truth * normalized.real
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return {"errors": errors, "symbols": int(len(indexes)), "ber": errors / len(indexes),
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"plus_mean": float(np.mean(plus)), "plus_std": float(np.std(plus)),
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"minus_mean": float(np.mean(minus)), "minus_std": float(np.std(minus)),
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"cloud_separation_sigma": separation,
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"evm_rms": float(np.sqrt(residual_power / matched_power)),
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"matched_component_power": matched_power, "residual_power": residual_power,
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"matched_residual_db": (float("inf") if residual_power == 0 else
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float(10 * np.log10(matched_power / residual_power))),
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"margin_median": float(np.median(margin)),
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"margin_p10": float(np.percentile(margin, 10)),
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"margin_p01": float(np.percentile(margin, 1)),
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"normalized": normalized, "truth": truth, "indexes": indexes}
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def eye_metrics(matched: np.ndarray, nominal: int, estimate: dict, expected: np.ndarray,
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symbol_rate: int) -> tuple[dict, np.ndarray, np.ndarray]:
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samples_per_symbol = SAMPLE_RATE // symbol_rate
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valid = np.flatnonzero(guarded_tile_masks(len(expected))[1])
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valid = valid[(valid >= 2) & (valid < len(expected) - 2)]
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if len(valid) > 4096:
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valid = valid[np.linspace(0, len(valid) - 1, 4096, dtype=int)]
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phases = np.linspace(-0.5, 0.5, 41)
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openings, traces = [], []
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for phase in phases:
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positions = (nominal + (estimate["timing_fraction"] + phase) * samples_per_symbol
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+ valid * samples_per_symbol)
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values = lab057.interpolate(matched, positions)
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times = (valid + 0.5 + phase) / symbol_rate
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normalized = values * np.exp(-2j * np.pi * estimate["cfo_hz"] * times) / estimate["h"]
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truth = expected[valid]
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openings.append(float(np.mean(normalized.real[truth > 0]) -
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np.mean(normalized.real[truth < 0])))
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traces.append(normalized.real)
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openings = np.asarray(openings)
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center = int(np.argmin(abs(phases)))
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left = int(np.argmin(abs(phases + 0.1)))
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right = int(np.argmin(abs(phases - 0.1)))
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metrics = {"opening": float(openings[center]),
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"opening_at_minus_0p1": float(openings[left]),
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"opening_at_plus_0p1": float(openings[right]),
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"drop_minus_0p1_percent": float(100 * (1 - openings[left] / openings[center])),
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"drop_plus_0p1_percent": float(100 * (1 - openings[right] / openings[center]))}
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return metrics, phases, np.asarray(traces).T
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def isi_metrics(estimate: dict, expected: np.ndarray, symbol_rate: int) -> tuple[dict, np.ndarray]:
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indexes = np.arange(5, len(expected) - 5)
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train = guarded_tile_masks(len(expected))[0][indexes]
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indexes = indexes[train]
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if len(indexes) > 50000:
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indexes = indexes[np.linspace(0, len(indexes) - 1, 50000, dtype=int)]
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times = (indexes + 0.5) / symbol_rate
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y = estimate["symbols"][indexes] * np.exp(-2j * np.pi * estimate["cfo_hz"] * times)
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matrix = np.column_stack([expected[indexes - offset] for offset in ISI_OFFSETS])
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taps = np.linalg.lstsq(matrix, y, rcond=None)[0]
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main = float(abs(taps[5]) ** 2)
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adjacent = float(np.sum(abs(np.delete(taps, 5)) ** 2))
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return {"main_tap_power": main, "adjacent_taps_power": adjacent,
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"isi_ratio_db": float(10 * np.log10(adjacent / main)),
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"offsets": ISI_OFFSETS.tolist(),
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"taps": [{"real": float(x.real), "imag": float(x.imag)} for x in taps]}, taps
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def channel_metrics(tx: np.ndarray, rx: np.ndarray, symbol_rate: int,
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cfo_hz: float) -> tuple[dict, dict]:
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indexes = np.arange(len(tx))
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carrier = np.exp(-2j * np.pi * CARRIER_HZ * indexes / SAMPLE_RATE)
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x = (tx - np.mean(tx)) * carrier
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y = (rx - np.mean(rx)) * carrier * np.exp(-2j * np.pi * cfo_hz * indexes / SAMPLE_RATE)
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frequency, pxx = signal.welch(x, fs=SAMPLE_RATE, window="hann", nperseg=8192,
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noverlap=4096, return_onesided=False)
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_, pyy = signal.welch(y, fs=SAMPLE_RATE, window="hann", nperseg=8192,
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noverlap=4096, return_onesided=False)
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_, pxy = signal.csd(x, y, fs=SAMPLE_RATE, window="hann", nperseg=8192,
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noverlap=4096, return_onesided=False)
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order = np.argsort(frequency)
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frequency, pxx, pyy, pxy = frequency[order], pxx[order], pyy[order], pxy[order]
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transfer = pxy / np.maximum(pxx, 1e-30)
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coherence = abs(pxy) ** 2 / np.maximum(pxx * pyy, 1e-30)
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bandwidth = symbol_rate * (1 + 0.35) / 2
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mask = ((abs(frequency) <= bandwidth) &
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(pxx >= np.max(pxx[abs(frequency) <= bandwidth]) * 0.01))
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f, h, coh = frequency[mask], transfer[mask], coherence[mask]
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gain_db = 20 * np.log10(np.maximum(abs(h), 1e-30))
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phase = np.unwrap(np.angle(h))
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phase_fit = np.polyfit(f, phase, 1)
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phase_residual = phase - np.polyval(phase_fit, f)
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group_delay = -np.gradient(phase, f) / (2 * np.pi)
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stable = bool(len(f) >= 20 and np.median(coh) >= 0.2)
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group_delay_stable = bool(len(f) >= 64 and np.median(coh) >= 0.9)
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metrics = {"stable": stable, "bins": int(len(f)),
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"median_coherence": float(np.median(coh)),
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"amplitude_ripple_p95_p05_db": float(np.percentile(gain_db, 95) - np.percentile(gain_db, 5)),
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"max_min_gain_db": float(np.max(gain_db) - np.min(gain_db)),
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"gain_slope_db_per_mhz": float(np.polyfit(f / 1e6, gain_db, 1)[0]),
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"common_group_delay_seconds": float(-phase_fit[0] / (2 * np.pi)),
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"residual_phase_ripple_p95_p05_rad": float(np.percentile(phase_residual, 95) - np.percentile(phase_residual, 5)),
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"group_delay_stable": group_delay_stable,
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"group_delay_variation_p95_p05_seconds": float(np.percentile(group_delay, 95) - np.percentile(group_delay, 5)) if group_delay_stable else None,
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"band_edge_hz": bandwidth, "tx_psd_threshold_db": -20.0}
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arrays = {"frequency": f, "gain_db": gain_db, "phase_residual": phase_residual,
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"coherence": coh}
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return metrics, arrays
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def serializable(value):
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if isinstance(value, dict):
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return {key: serializable(item) for key, item in value.items()
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if key not in ("matched", "normalized", "truth", "indexes")}
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if isinstance(value, list):
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return [serializable(item) for item in value]
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if isinstance(value, complex):
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return {"real": float(value.real), "imag": float(value.imag)}
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if isinstance(value, np.generic):
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return value.item()
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return value
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def analyze_values(values: np.ndarray, expected: np.ndarray, symbol_rate: int) -> tuple[dict, dict]:
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frontend = lab057.Frontend(symbol_rate)
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receiver = receiver_like(frontend, values, expected)
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receiver_select = np.arange(len(expected)) >= 1280
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receiver_result = evaluate(receiver, expected, symbol_rate, receiver_select)
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oracle_matched = oracle_matched_filter(values, frontend.taps, symbol_rate, len(expected))
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oracle = oracle_estimate(oracle_matched, frontend.nominal, expected, symbol_rate)
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validation = guarded_tile_masks(len(expected))[1]
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oracle_result = evaluate(oracle, expected, symbol_rate, validation)
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eye, phases, traces = eye_metrics(oracle_matched, frontend.nominal, oracle,
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expected, symbol_rate)
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isi, taps = isi_metrics(oracle, expected, symbol_rate)
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receiver_public = {key: value for key, value in receiver.items() if key not in ("symbols", "matched")}
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oracle_public = {key: value for key, value in oracle.items() if key != "symbols"}
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result = {"receiver_like": {**serializable(receiver_public), "metrics": serializable(receiver_result)},
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"oracle": {**serializable(oracle_public), "metrics": serializable(oracle_result),
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"eye": eye, "isi": isi}}
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working = {"frontend": frontend, "receiver": receiver, "oracle": oracle,
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"oracle_matched": oracle_matched,
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"receiver_result": receiver_result, "oracle_result": oracle_result,
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"eye_phases": phases, "eye_traces": traces, "isi_taps": taps}
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return result, working
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|
||||
def geometric_db(new: float, old: float) -> float:
|
||||
return float(20 * np.log10(new / old))
|
||||
|
||||
|
||||
def run_functional_tests() -> None:
|
||||
"""Быстрые проверки формул без raw IQ и оборудования."""
|
||||
expected = expected_symbols(20_000)
|
||||
indexes = np.arange(len(expected))
|
||||
h = 0.4 + 0.3j
|
||||
estimate = {"symbols": h * expected, "h": h, "cfo_hz": 0.0}
|
||||
metrics = evaluate(estimate, expected, 20_000, np.ones(len(expected), bool))
|
||||
if metrics["errors"] != 0 or metrics["evm_rms"] > 1e-12:
|
||||
raise AssertionError("Точный BPSK control не прошёл")
|
||||
isi, _ = isi_metrics(estimate, expected, 20_000)
|
||||
if isi["adjacent_taps_power"] > isi["main_tap_power"] * 1e-20:
|
||||
raise AssertionError("Точный одно-tap control ошибочно содержит ISI")
|
||||
|
||||
|
||||
def make_plots(rows: list[dict], work: dict[str, dict]) -> None:
|
||||
OUTPUT.mkdir(parents=True, exist_ok=True)
|
||||
fig, axes = plt.subplots(1, 2, figsize=(11, 4.5))
|
||||
for axis, mode in zip(axes, ("A", "B")):
|
||||
for label in (mode + "1", mode + "2"):
|
||||
metric = work[label]["oracle_result"]
|
||||
values, truth = metric["normalized"], metric["truth"]
|
||||
select = np.linspace(0, len(values) - 1, min(5000, len(values)), dtype=int)
|
||||
axis.scatter(values.real[select], values.imag[select], s=2, alpha=.2, label=label)
|
||||
axis.set(title=f"{mode}: oracle, held-out symbols", xlabel="I / h", ylabel="Q / h", xlim=(-4, 4), ylim=(-4, 4))
|
||||
axis.grid(True, alpha=.25); axis.legend()
|
||||
fig.tight_layout(); fig.savefig(OUTPUT / "constellation_a_vs_b.png", dpi=160); plt.close(fig)
|
||||
|
||||
for mode in ("A", "B"):
|
||||
fig, axis = plt.subplots(figsize=(8, 4.5))
|
||||
for label in (mode + "1", mode + "2"):
|
||||
phases, traces = work[label]["eye_phases"], work[label]["eye_traces"]
|
||||
select = np.linspace(0, len(traces) - 1, min(180, len(traces)), dtype=int)
|
||||
axis.plot(phases, traces[select].T, alpha=.05, color="C0" if label.endswith("1") else "C1")
|
||||
axis.axvline(0, color="black", lw=.8); axis.axhline(0, color="black", lw=.8)
|
||||
axis.set(title=f"Eye diagram {mode}, oracle alignment", xlabel="Смещение, доли символа", ylabel="Re(r/h)")
|
||||
axis.grid(True, alpha=.2); fig.tight_layout(); fig.savefig(OUTPUT / f"eye_{mode.lower()}.png", dpi=160); plt.close(fig)
|
||||
|
||||
labels = [row["label"] for row in rows]
|
||||
figure, axes = plt.subplots(1, 3, figsize=(12, 4))
|
||||
axes[0].bar(labels, [100 * row["oracle"]["metrics"]["ber"] for row in rows]); axes[0].set_ylabel("BER, %")
|
||||
axes[1].bar(labels, [row["oracle"]["metrics"]["evm_rms"] for row in rows]); axes[1].set_ylabel("RMS EVM")
|
||||
axes[2].bar(labels, [row["oracle"]["metrics"]["matched_residual_db"] for row in rows]); axes[2].set_ylabel("Matched/residual, dB")
|
||||
for axis in axes: axis.grid(True, axis="y", alpha=.25)
|
||||
figure.tight_layout(); figure.savefig(OUTPUT / "symbol_quality_comparison.png", dpi=160); plt.close(figure)
|
||||
|
||||
fig, axes = plt.subplots(2, 2, figsize=(12, 7), sharex="col")
|
||||
for column, mode in enumerate(("A", "B")):
|
||||
for label in (mode + "1", mode + "2"):
|
||||
arrays = work[label]["channel_arrays"]
|
||||
axes[0, column].plot(arrays["frequency"] / 1000, arrays["gain_db"], alpha=.8, label=label)
|
||||
axes[1, column].plot(arrays["frequency"] / 1000, arrays["phase_residual"], alpha=.8, label=label)
|
||||
axes[0, column].set(title=f"{mode}: усреднённая H(f)", ylabel="|H(f)|, dB")
|
||||
axes[1, column].set(xlabel="Частота baseband, кГц", ylabel="Остаточная фаза, rad")
|
||||
for row in range(2): axes[row, column].grid(True, alpha=.25); axes[row, column].legend()
|
||||
fig.tight_layout(); fig.savefig(OUTPUT / "channel_transfer.png", dpi=160); plt.close(fig)
|
||||
|
||||
fig, axes = plt.subplots(2, 2, figsize=(10, 7), sharex=True)
|
||||
for axis, label in zip(axes.flat, labels):
|
||||
taps = work[label]["isi_taps"]
|
||||
axis.stem(ISI_OFFSETS, 20 * np.log10(np.maximum(abs(taps / taps[5]), 1e-8)), basefmt=" ")
|
||||
axis.set(title=label, ylabel="Tap/main, dB"); axis.grid(True, alpha=.25)
|
||||
axes[1, 0].set_xlabel("Смещение, символы"); axes[1, 1].set_xlabel("Смещение, символы")
|
||||
fig.tight_layout(); fig.savefig(OUTPUT / "diagnostic_isi.png", dpi=160); plt.close(fig)
|
||||
|
||||
|
||||
def main() -> None:
|
||||
OUTPUT.mkdir(parents=True, exist_ok=True)
|
||||
metadata = json.loads((RAW / "tx_metadata.json").read_text(encoding="utf-8"))
|
||||
analysis = json.loads((LAB056 / "rf_analysis.json").read_text(encoding="utf-8"))
|
||||
integrity = {"tx": {"path": str(TX_PATH.relative_to(PROJECT_ROOT)), "bytes": TX_PATH.stat().st_size,
|
||||
"sha256": sha256(TX_PATH), "expected_sha256": TX_SHA256},
|
||||
"rx": {"path": str(RX_PATH.relative_to(PROJECT_ROOT)), "bytes": RX_PATH.stat().st_size,
|
||||
"sha256": sha256(RX_PATH), "expected_sha256": RX_SHA256}}
|
||||
if integrity["tx"]["sha256"] != TX_SHA256 or integrity["rx"]["sha256"] != RX_SHA256:
|
||||
raise RuntimeError("SHA-256 исходных данных Lab056 не совпал")
|
||||
tx_file, rx_file = Cs8File(TX_PATH), Cs8File(RX_PATH)
|
||||
measured = {row["label"]: row for row in analysis["segments"]}
|
||||
rows, work = [], {}
|
||||
for segment in metadata["segments"]:
|
||||
label, rate = segment["label"], segment["symbol_rate"]
|
||||
expected = expected_symbols(rate)
|
||||
tx = tx_file.read(segment["start"], segment["samples"])
|
||||
rx_start = measured[label]["measurement"]["start"]
|
||||
rx = rx_file.read(rx_start, segment["samples"])
|
||||
result, working = analyze_values(rx, expected, rate)
|
||||
trim = 21 * (SAMPLE_RATE // rate)
|
||||
channel, arrays = channel_metrics(tx[trim:-trim], rx[trim:-trim], rate,
|
||||
result["oracle"]["cfo_hz"])
|
||||
result["oracle"]["channel"] = channel
|
||||
row = {"label": label, "symbol_rate": rate, "samples_per_symbol": SAMPLE_RATE // rate,
|
||||
"rx_start": rx_start, **result}
|
||||
rows.append(row); working["channel_arrays"] = arrays; work[label] = working
|
||||
|
||||
controls = {"tx": {}, "awgn": {}}
|
||||
for rate, label in ((20_000, "A"), (500_000, "B")):
|
||||
segment = next(item for item in metadata["segments"] if item["label"] == label + "1")
|
||||
tx = tx_file.read(segment["start"], segment["samples"])
|
||||
expected = expected_symbols(rate)
|
||||
tx_result, _ = analyze_values(tx, expected, rate)
|
||||
controls["tx"][label] = tx_result
|
||||
random_generator = np.random.default_rng(AWGN_SEED)
|
||||
noise = np.sqrt(AWGN_COMPLEX_VARIANCE / 2) * (
|
||||
random_generator.normal(size=len(tx)) + 1j * random_generator.normal(size=len(tx)))
|
||||
awgn_result, _ = analyze_values((tx + noise).astype(np.complex64), expected, rate)
|
||||
controls["awgn"][label] = awgn_result
|
||||
controls["awgn"].update({"seed": AWGN_SEED, "complex_noise_variance_per_sample": AWGN_COMPLEX_VARIANCE,
|
||||
"invariant": "same Fs, TX RMS and sampled complex-noise variance"})
|
||||
|
||||
background_start = analysis["alignment"]["start"] - metadata["segments"][1]["samples"] - 100_000
|
||||
background_values = rx_file.read(background_start, metadata["segments"][1]["samples"])
|
||||
background_result, _ = analyze_values(background_values, expected_symbols(500_000), 500_000)
|
||||
controls["background"] = {"rx_start": background_start, **background_result}
|
||||
if any(controls["tx"][mode]["oracle"]["metrics"]["ber"] != 0 for mode in ("A", "B")):
|
||||
raise RuntimeError("TX waveform control BER не равен нулю")
|
||||
if not (controls["awgn"]["B"]["oracle"]["metrics"]["evm_rms"] >
|
||||
controls["awgn"]["A"]["oracle"]["metrics"]["evm_rms"]):
|
||||
raise RuntimeError("AWGN control не показал ожидаемого ухудшения EVM")
|
||||
background_oracle = controls["background"]["oracle"]
|
||||
if not (0.4 < background_oracle["metrics"]["ber"] < 0.6 and
|
||||
background_oracle["train_coherence"] < 0.01):
|
||||
raise RuntimeError("Background ошибочно выглядит как качественный BPSK")
|
||||
|
||||
def mean_metric(mode: str, path: tuple[str, ...]) -> float:
|
||||
values = []
|
||||
for row in rows:
|
||||
if row["label"].startswith(mode):
|
||||
value = row
|
||||
for key in path: value = value[key]
|
||||
values.append(value)
|
||||
return float(np.mean(values))
|
||||
|
||||
primary_paths = {
|
||||
"symbol_ber": ("oracle", "metrics", "ber"), "evm_rms": ("oracle", "metrics", "evm_rms"),
|
||||
"matched_residual_db": ("oracle", "metrics", "matched_residual_db"),
|
||||
"decision_margin_median": ("oracle", "metrics", "margin_median"),
|
||||
"eye_opening": ("oracle", "eye", "opening"), "isi_ratio_db": ("oracle", "isi", "isi_ratio_db"),
|
||||
"channel_ripple_db": ("oracle", "channel", "amplitude_ripple_p95_p05_db")}
|
||||
comparison = {}
|
||||
for name, path in primary_paths.items():
|
||||
a, b = mean_metric("A", path), mean_metric("B", path)
|
||||
comparison[name] = {"a_mean": a, "b_mean": b, "b_minus_a": b - a}
|
||||
repeatability = {}
|
||||
for mode in ("A", "B"):
|
||||
first = next(row for row in rows if row["label"] == mode + "1")
|
||||
second = next(row for row in rows if row["label"] == mode + "2")
|
||||
repeatability[mode] = {}
|
||||
for name, path in primary_paths.items():
|
||||
one, two = first, second
|
||||
for key in path: one = one[key]; two = two[key]
|
||||
entry = {"absolute_second_minus_first": float(two - one),
|
||||
"relative_second_minus_first": None if one == 0 else float((two - one) / abs(one))}
|
||||
if name in ("evm_rms", "eye_opening") and one > 0 and two > 0:
|
||||
entry["difference_db"] = geometric_db(two, one)
|
||||
elif name == "symbol_ber" and one > 0 and two > 0:
|
||||
entry["difference_db"] = float(10 * np.log10(two / one))
|
||||
elif name.endswith("_db"):
|
||||
entry["difference_db"] = float(two - one)
|
||||
else: entry["difference_db"] = None
|
||||
repeatability[mode][name] = entry
|
||||
|
||||
summary = {"lab": "Lab058", "status": "COMPLETED", "scope": "OFFLINE_SAVED_LAB056_ONLY",
|
||||
"rf_tx": 0, "hardware_access": 0, "integrity": integrity,
|
||||
"method": {"tiles": TILE_COUNT, "training_tiles": "even", "validation_tiles": "odd",
|
||||
"guard_symbols_each_tile_edge": 8,
|
||||
"oracle_dc_source": "guarded_even_training_raw_intervals_only",
|
||||
"timing_grid_symbol": TIMING_GRID.tolist(), "isi_offsets": ISI_OFFSETS.tolist()},
|
||||
"segments": serializable(rows), "comparison": comparison,
|
||||
"repeatability": repeatability, "controls": serializable(controls),
|
||||
"known_energy_per_symbol_difference_db": EXPECTED_ENERGY_DIFFERENCE_DB,
|
||||
"lab054_historical_result": "NOT_A, 0/16", "lab058_commit": "NOT_PERFORMED",
|
||||
"push": "NOT_PERFORMED"}
|
||||
(OUTPUT / "summary.json").write_text(json.dumps(summary, ensure_ascii=False, indent=2, allow_nan=False) + "\n", encoding="utf-8")
|
||||
|
||||
flat_rows = []
|
||||
for row in rows:
|
||||
for mode in ("receiver_like", "oracle"):
|
||||
metric = row[mode]["metrics"]
|
||||
flat_rows.append({"label": row["label"], "symbol_rate": row["symbol_rate"], "analysis_mode": mode,
|
||||
**{key: metric[key] for key in ("errors", "symbols", "ber", "plus_mean", "plus_std",
|
||||
"minus_mean", "minus_std", "cloud_separation_sigma", "evm_rms",
|
||||
"matched_component_power", "residual_power", "matched_residual_db",
|
||||
"margin_median", "margin_p10", "margin_p01")},
|
||||
"timing_fraction": row[mode]["timing_fraction"], "cfo_hz": row[mode]["cfo_hz"],
|
||||
"eye_opening": row.get("oracle", {}).get("eye", {}).get("opening") if mode == "oracle" else None,
|
||||
"isi_ratio_db": row.get("oracle", {}).get("isi", {}).get("isi_ratio_db") if mode == "oracle" else None,
|
||||
"channel_ripple_db": row.get("oracle", {}).get("channel", {}).get("amplitude_ripple_p95_p05_db") if mode == "oracle" else None})
|
||||
with (OUTPUT / "segment_metrics.csv").open("w", newline="", encoding="utf-8") as stream:
|
||||
writer = csv.DictWriter(stream, fieldnames=list(flat_rows[0])); writer.writeheader(); writer.writerows(flat_rows)
|
||||
with (OUTPUT / "channel_response.csv").open("w", newline="", encoding="utf-8") as stream:
|
||||
writer = csv.writer(stream); writer.writerow(["label", "frequency_hz", "gain_db", "phase_residual_rad", "coherence"])
|
||||
for label, item in work.items():
|
||||
arrays = item["channel_arrays"]
|
||||
writer.writerows(zip([label] * len(arrays["frequency"]), arrays["frequency"], arrays["gain_db"], arrays["phase_residual"], arrays["coherence"]))
|
||||
make_plots(rows, work)
|
||||
print(json.dumps({"status": summary["status"], "comparison": comparison,
|
||||
"receiver_ber": {r["label"]: r["receiver_like"]["metrics"]["ber"] for r in rows},
|
||||
"oracle_ber": {r["label"]: r["oracle"]["metrics"]["ber"] for r in rows},
|
||||
"controls": {"tx_ber": {k: v["oracle"]["metrics"]["ber"] for k, v in controls["tx"].items()},
|
||||
"awgn_ber": {k: v["oracle"]["metrics"]["ber"] for k, v in controls["awgn"].items() if isinstance(v, dict)},
|
||||
"background_ber": controls["background"]["oracle"]["metrics"]["ber"]}}, indent=2))
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
Reference in New Issue
Block a user