High Performance of a TOA-TDOA Hybrid GSM Location System for Intelligent Transportation Systems

This paper illustrates the performance of a mobile positioning technique applicable to a GSM network.An experimental system of a network-based GSM positioning for ITS has been proposed, and the hybrid TOA-TDOA method based on GSM signaling has been analyzed and used. The performance of the proposed system is showed through simulations in urban and suburban environments. The accuracy for 67% mobile stations is 70 m in urban and 120 m in suburban. The accuracy, coverage and network load of positioning system are also analyzed.

消防车辆实时监控系统的设计与实现

随着通信技术的发展,GPS的应用技术已经成为一个十分重要的研究课题。文章介绍了一个基于GPS/GSM/GIS的消防车辆实时监控系统的结构、功能及其实现原理,并对GPS接收器的结构组成、接口设计、车载单元系统结构和系统通信等关键技术进行了详细说明。实践表明,该系统性能稳定,有效地提高了森林灭火的准确性和高效性。