Research and implementation of incoherent spread spectrum signal acquisition algorithm
An acquisition algorithm of incoherent spread spectrum signal is studied,which is used for the fast acquisition of one-channel remote control signal and four-channel ranging signal of satellite-borne S-band incoherent spread spectrum transponder.The acquisition unit uses parallel FFT technology and block-double zero-compensation technology to realize the correlation integration operation of 1 kHz coherent ranging signal and 2kHz non-coherent remote control signal,which suppresses the data jump under the condition of ensuring the acquisition performance,and uses two-stage threshold detection and judgment technology to re-duce the probability of false acquisition for the correlation integration results,and finally adds the acquisi-tion verification algorithm to suppress the side lobe interference.The simulation and test results show that the acquisition unit can suppress data overturn,achieve fast acquisition of multi-channel coherent and inco-herent spread spectrum signals,and the single-channel capture time is less than 2s.
incoherent spread spectrumparallel FFTblocking-double zero fillingdata flipmultiple channels
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