为了匹配信道特性达到较佳的传输效果，应选用适当码型，以便在最小传输带宽的条件下大大减小或消除这种干扰。选用了MATLAB软件进行了仿真，设计实现了一些简单的常用码型-In order to match the channel transmission characteristics to achieve better results, should use the appropriate code type, so that under the conditions of minimum tra

包括卫星星座编程，c\a码生成，多普勒频移实现，gps信号生成，干扰噪声生成（宽带噪声，窄带噪声，单频噪声）-Programming comprises satellite constellations, c \ a code generator, to achieve the Doppler shift, gps signal generator, generating interference noise (wideband noise, narrowband noise, single f