CDMA调制解调器的设计

Design of CDMA modem

在无线局域网中,引入CDMA技术,即可实现点对点、点对多点的高速计算机通信,它解决了有线网耗资大、携带不便的缺陷。文中提出了一种CDMA调制解调器射频电路和数字基带处理电路框图,分析了它们的组成及工作过程,设计了扩展功能用的系统连接器。由此组装的电路,通过使用CDMA个人身份卡———UIM卡,实现了无线上网、语音通信、收发短消息等功能。

The techniques of CDMA in WLAN are discussed. High speed computer communitcation can be realized by one point to another point and one point to more points,the blemish is solved and more resources are wasted. A new design of RF block diagram,digital baseband block diagram of CDMA modem , the form and working-process are analysised, In order to expand function,a system connector is designed . By using the installed circuit and used CDMA person card-UIM card, the internet by wireless,communitcation by audio,short information can berealized.