基于无线网络的辅助GPS客户端设计

针对传统全球定位系统(GPS)在卫星信号微弱时定位情况差的问题，提出基于通用分组无线服务(GPRS)网络的辅助GPS定位方法。该方法通过在GPS模块中增加通信协议，实现GPRS无线通信功能，并利用GPRS传输辅助GPS所需的信息。介绍系统硬件组成及网络传输协议的软件设计。测试结果表明，该系统连接上网速度快，提高了GPS接收机在弱信号情况下的捕获能力，加快了GPS接收机的定位速度。

Design of Assisted GPS Client Based on Wireless Network

To solve the positioning problem of the traditional Global Position System(GPS) under the weak GPS signal, the method of Assisted Global Position System(AGPS) based on General Packet Radio Service(GPRS) is AGPRS wireless communication is implemented by adding communication protocol into GPS module, and information required by the AGPS receiver is transmitted through GPRS. Hardware components and software design of network transport protocols are separately introduced. Testing results show that this system not only can connect to Internet rapidly and improve the signal capture capability of GPS receiver under the weak GPS signal sharply, but also can accelerate the fixing speed of GPS receiver.