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In this paper, an acquisition algorithm is proposed to solve the problem of long PN code acquisition in direct-sequence spread-speactrum (DS-SS) communications over multipath environment. The algorithm is the combination of partial correlation, cumulation and average of power spectrum density (PSD). Through partial correlation, we can get a sinusoidal signal which reflects the Doppler shift, and then...
It is difficult to realize spread spectrum signal acquisition in time transfer system for a receiver operating in dynamic situation. For a receiver that realized by all-digital model, a new acquisition mode using fast Fourier transform algorithm is presented, which estimates the Doppler shift during the PN phase acquisition. The algorithm presented in the paper solves the problem of signal acquisition...
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