An Improved Multipath Mitigation Algorithm for Navigation System

The ASPeCT (Autocorrelation Side-Pink Cancellation Technique) eliminate ambiguities tracking problem caused by autocorrelation function sidelobe of Sine-BOC(1, 1) signal which used in navigation systems. Based on the this scheme, and combined with the traditional narrow correction and strobe multipath suppression algorithms, multipath suppression performance of Sine-BOC(1, 1) and CBOC (6,1,1 / 11) signals are analyzed in this paper. In addition, with Zero Crossing Point offset and multipath suppression capability of EML identification curve analyzed, the conclusions are drawn that ASPeCT tracking scheme can not only eliminates ambiguities tracking, but effectively enhance multipath suppression capability of narrow correlation and Strobe techniques.