论文部分内容阅读
“大哥大”选择有讲究目前投放在市场上的＂大哥大＂分为９００兆和８００兆两种．９００兆（ＭＨＺ）系统和８００兆（ＭＨＺ）系统，是移动通信系统的不同类型，顾名思义，９００ＭＨＺ系统使用９００ＭＨＺ的无线频段，８００ＭＨＺ系统使用８００ＭＨＺ的无线频段。９...
“Big Brother” choose to pay attention to currently put on the market, “Big Brother” is divided into 900 trillion and 800 trillion two. 900 MHZ system and 800 MHZ system are different types of mobile communication system. As its name implies, 900MHZ system uses 900MHZ wireless band and 800MHZ system uses 800MHZ wireless band. 9 ...