The direct sequence code division multiple access(DS-CDMA) has already been widely used in wireless communications due to its many advantages, such as large capacity, anti-jammer capability, universal frequency reuse and low power spectrum. Especially during the past twenty years, the direct sequence system has been greatly applied to military communication equipment, such as satellite navigation(GPS、 GLONASS),LEO satellite communication, wireless sensor networks. The military communication surroundings, wh...