Accurate Acquisition System of Spread Spectrum Signal
A spread spectrum signal, accurate technology, applied in the field of spread spectrum signal accurate capture system, can solve the problems of unmeasured carrier Doppler rate of change, small carrier frequency search range, large carrier frequency measurement error, etc. Accumulate and process the effect of good real-time performance and high frequency measurement accuracy
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[0019] refer to figure 1 . In the preferred embodiment described below, a system for accurately capturing spread spectrum signals includes: a sampling buffer module, a compensation correction module, a double-block grouping module, a local pseudo-code module, a double-block zero padding module, a 2N-point FFT module, a common Yoke module, 2N-point IFFT module, truncation processing module, rate-of-change compensation module, carrier recovery module, M-point FFT module and detection and calculation module, wherein: the sampling buffer module performs down-sampling processing on the received signal, and controls the ping-pong of the sampling data Reading and writing; the compensation and correction module divides the Doppler frequency shift range into multiple frequency sub-slots, and performs frequency compensation on the sampling data output by the sampling buffer module according to the carrier Doppler frequency shift in the sub-slots, and then according to the pseudo-slots i...
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