河北移动公司BSS培训教材初稿第三章GSM无线接口理论目录第三章GSM无线接口理论......................................................................................1第一节工作频段的分配.......................................................................................4一、我国GSM网络的工作频段......................................................................4二、频道间隔.....................................................................................................4三、频道配置.....................................................................................................4四、干扰保护比.................................................................................................5第二节时分多址技术（TDMA）........................................................................5一、TDMA信道的概念....................................................................................5二、TDMA帧....................................................................................................7三、突发脉冲序列（Burst）............................................................................8四、逻辑信道与物理信道之间的对应关系...................................................10五、信道组合种类...........................................................................................12六、系统消息...............................................................................................一三第三节无线路径的损耗和衰落.........................................................................14一、无线路径的损耗和衰落...........................................................................14二、分集接收...................................................................................................16第四节移动台和基站的时间调整.....................................................................一八第五节跳频技术.............................................................................................一八一、跳频的种类及各自实现的方法...............................................................19二、跳频的优点...............................................................................................20三、跳频序列...................................................................................................20第六节语音的传输过程.....................................................................................21一、语音编码...................................................................................................21二、信道编码...................................................................................................21三、交织技术...................................................................................................23四、加密...........................................................................................................24五、调制和解调...............................................................................................24第四章呼叫处理过程...............................................................................................24第一节小区的选择与重选.................................................................................24一、小区选择过程.....................................................................................24二、小区重选过程..............................................
