The article discusses the communication and position of the system,and emphasizes the structure and principle of the subsystem and describes the GPS system,GSM and WLAN technology in detail.

• 本文围绕系统通信和定位这两个主题,从各子系统的结构组成和原理分析上着重入手,对GPS系统、GSM和WLAN技术作了详尽的描述和研究。