GPS车辆监控系统性能提高的研究与实现

本文提出并应用了预解码技术，应用该技术对差分GPS电文进行预解码处理，从而使差分GPS接收机在任意时刻与任意时间间隔输出的差分信息能够被通信控制器完整、高效、准确地接收并转发．为降低GPS车辆监控系统数据链传输的误码率，本文对所有需要无线传输的数字信息都进行了BCH纠错编码处理．本文还综合运用信道编码、差分信息预解码和抗干扰等技术，对GPS车辆监控系统的关键部件 —— 通信控制器的软硬件进行研究和改进，完善了通信控制器的性能．

RESEARCH AND IMPLEMENTATION OF PERFORMANCE IMPROVEMENT OF VEHICULAR GPS MONITOR SYSTEM

In this paper, the pre decoding technology is put forward and adopted. The differential GPS (DGPS) data output by DGPS receiver at anytime and any intervals can be processed and transmitted by the communication controller. The DGPS data is successfully transmitted and fullly utilized. In order to reduce error code rate in the data link of GPS Vehicular Monitor System, BCH Error Correcting Code is adopted to all the wireless transmitted data. In order to improve capability of the GPS Vehicular Monitor System, the hardware and software of the Communication Controller are improved in this paper. The Channel Coding, DGPS data pre decoding, anti jamming techniques are applied to the controller.