Mobile communication technology has been gained flourish development last several tens year , it has been developed from the first generation simulation communication system manifested by audio transferring to the second generation gsm digital communication system and gprs data t system manifested by data and audio transferring simultaneously and to the third generation mobile communication system 移动通信技术近几十年来蓬勃发展，已由第一代以语音为主的模拟通信系统发展到第二代gsm数字通信系统和正兴起可同时传输数据与语音的gprs数据传输系统以及第三代移动通信系统。
The content of this dissertation are including : an implement solution of wireless data trans - receiving system brief introduction of usb 1 . 1 specifications the interfacing technology with pc through usb development procedure of an applied dsp system and its hardware and soft wares discussions on digital signal processing method and system reliability the system introduced in this dissertation has been authenticated and experts considered that it will have a promising future 内容涉及到无线数字通信系统的的发展现状及未来的发展方向；提出了系统的总体设计方案；介绍了usb1 . 1协议规范；给出了usb设备开发实例及相应的驱动程序设计；分析了dsp系统的开发流程及实例；介绍了上层应用程序设计；对数字通信中的信源编码、信道编码、直接序列扩频、数字调制方案以及系统的可靠性等方面进行了研究。
