Comparison between adaptive algorithms using in GPS receiver
M. E. Ahmed Wang Yongfang Tan Zhanzhong (School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China)
To compare the adaptive algorithms performance, such as power inversion (PI),multiple signal classification (MUSIC),and min-norm algorithms, the algorithms principle was analysed. In computer simulation, the algorithms were adopted in uniform linear array, the antenna gain in the useful signal and interference directions were compared. Power inversion, multiple signal classification, and min-norm algorithms were compared in case of using GPS signal with power-160?dBW as a useful signal and a varying power for the interference of the same frequency coming from different directions. The simulation result indicates that the three algorithms can be used for GPS receiver to achieve anti-jammer. The power inversion algorithm gives a bad result when dealing with low power interference, MUSIC algorithm can cancel the low power interference but introduces a lot of false nulls, but min-norm algorithm can cancel the low power interference and also do not introduce false nulls.
【CateGory Index】： TN97;P228.4