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by morcheeba
1748 days ago
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PRN (Pseudorandom noise) in the context of GPS is just a coding standard - it's just CDMA (aka Spread Spectrum) and it allows all satellite to use the same frequency. A side benefit is that the signals can be below the noise floor, and when you apply the gain from decoding, it rises the signal above the noise floor (exactly like how you can pick out a voice in a crowded bar if you know what that voice sounds like). |
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