Satellite navigation receiver carrier loop tracking device in high dynamic environment
The invention discloses a satellite navigation receiver carrier loop tracking device in a high dynamic environment, which comprises a discriminator, a loop filter, a numerically-controlled oscillator and an open loop acceleration estimator, wherein the discriminator is used for generating a phase di...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | The invention discloses a satellite navigation receiver carrier loop tracking device in a high dynamic environment, which comprises a discriminator, a loop filter, a numerically-controlled oscillator and an open loop acceleration estimator, wherein the discriminator is used for generating a phase difference or a frequency difference between a receiving signal after stripping a pseudo code and a local reproduction carrier signal, and sending the phase difference or the frequency difference to the loop filter; the loop filter is used for generating a receiving signal speed estimation value and an acceleration estimation value according to output of the discriminator; the numerically-controlled oscillator is used for acquiring frequency of the local reproduction carrier signal according to output of the loop filter, generating a local reproduction carrier signal and inputting the signal to the discriminator; and the open loop acceleration estimator is used for estimating a Doppler frequency change rate of the receiving signal and assigning the Doppler frequency change rate to the loop filter. The loop has a strong high dynamic signal tracking ability, the loop performance can be effectively improved, and when the receiving signal has an acceleration of tens of g and even hundreds of g or the receiving signal has a large dynamic change, the receiving signal can be tracked. |
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