Research on effect of Cross-correlation on carrier tracking accuracy

摘要

Carrier tracking accuracy directly affected the quality assessment of the navigation signals. It's necessary to improve carrier tracking accuracy for effective navigation signal quality assessment. Cross-correlated interference between strong signal and weak signal and cancellation algorithm and carrier tracking loop discriminator were studies, improving the accuracy of carrier tracking loop. Strong signal was acquainted and tracked, then strong signal was reconstructed by using the estimated basic parameters of searched strong signal; Cross-correlation value between the reconstructed strong signal and the weak signal was computed and subtracted from the channel of acquisition of weak signal, eliminating the cross-correlation; Carrier tracking accuracy was further improved by adding the correction value in weak signal tracking channels. Feasibility of the algorithm is verified by simulation.