Abstract: The new BOC modulation signal in navigation satellite systems has an ACF(autocorrelation function) with multiple side peaks, which induces an ambiguity problem during the signal synchronizing procedure. A side lobe cancellation technique is proposed based on ACF features. By applying the proposed technique, both the main peak and the side peaks are diminished but the main/side peak ratio is significantly increased, which makes it much easier to acquire and track the BOC signal. It is especially compared with traditional BPSK-like (binary phase shift keying-like) method and results show that the proposed technique performs much better in the acquisition success rate despite the noise interference.

Key words: navigation satellite, binary offset carrier, autocorrelation function, signal acquisition