Initial Galileo receiver and SignalSim integration

2026-07-30 23:26:03 +03:00
commit 2a6ccfc23d
153 changed files with 8080 additions and 0 deletions
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+import numpy as np
+
+from galileo_rx.signal_profiles import galileo_e1_profile
+from galileo_rx.signals.code_provider import SyntheticCodeProvider
+from galileo_rx.signals.signal_generator import ChannelModelConfig, SatelliteSignalConfig, SyntheticSignalGenerator
+from galileo_rx.tracking.correlator import CorrelatorBank, SampleStreamCorrelator
+from galileo_rx.tracking.nco import CarrierNco, CodeNco
+
+
+def make_bank(fs: float, phase: float) -> CorrelatorBank:
+    profile = galileo_e1_profile()
+    return CorrelatorBank(
+        profile,
+        SyntheticCodeProvider(),
+        "E1B",
+        1,
+        CarrierNco(fs, 500.0),
+        CodeNco(fs, 4092, profile.code_rate_hz, phase),
+        0.25,
+        0.75,
+    )
+
+
+def test_vector_and_sample_stream_correlators_agree() -> None:
+    fs = 4.5e6
+    profile = galileo_e1_profile()
+    generator = SyntheticSignalGenerator(
+        profile,
+        SyntheticCodeProvider(),
+        fs,
+        satellites=[SatelliteSignalConfig(1, "E1B", code_delay_chips=3.2, doppler_hz=500.0)],
+        channel=ChannelModelConfig(add_awgn=False),
+    )
+    samples, _ = generator.generate(500)
+    vector = make_bank(fs, -3.2).correlate(samples)
+    stream = SampleStreamCorrelator(make_bank(fs, -3.2))
+    for sample in samples:
+        stream.accept(sample)
+    cycle = stream.dump()
+    for tap in ("very_early", "early", "prompt", "late", "very_late"):
+        assert abs(getattr(vector, tap) - getattr(cycle, tap)) < 1e-8
+