无线电通信对大多数人来讲并不陌生，人们习以为常的寻呼机、“大哥大”等都属无线电通信设备。无线电通信从过去到现在已经历了近百年，其技术发生了很大的变化，从模拟到数字；从点对点通信网进入地域通信网；从无干扰措施进入了采用跳频、直接序列扩频和两者混用的抗干扰体 Radiocommunication is no stranger to most people, and people are accustomed to pagers, “big brother” and so on are all radio communications equipment. Radiocommunications has experienced nearly a hundred years from the past to the present, its technology has undergone great changes, from analog to digital; from point to point communication network into the regional communication network; from non-interference measures into the use of frequency hopping, direct sequence spread spectrum and Anti-interference between the two mixed body