GMSK信号进行了仿真研究,GPRS采用与GSM 相同的频段、频带宽度、突发结构、无线调制标准、跳频规则以及相同的TDMA帧结构。因此，在GSM系统的基础上构建GPRS系统时，GSM系统中的绝大部分部件都不需要作硬件改动，只需作软件升级-GMSK signal simulation, GPRS and GSM using the same frequency and bandwidth, unexpected structure, the wireless standard modulation, frequency hopping and the same rules TDMA fr a me structure. Therefore, in the GSM system constructed on the basis of GPRS system, GSM System of most components do not need to make hardware changes, only for software upgrades