叙述了基于GSM网络的定位系统的系统框架及实现方案，分析了定位演示系统的红外通信接口协议及协议所采用的状态转换原理图；讨论了定位演示系统定位算法的原理和方法，建立了定位演示系统所采用的信道模型；同时给出了在微小区环境下的测试结果。结果表明：该方案能通过无线蜂窝系统完成手机相对位置计算，并结合电子地图很好地得到手机的绝对位置，最终完成了定位跟踪。关 键 词 定位技术; 通信接口协议; 定位算法; 双斜率模型Abstract This paper introduces the architecture of GSM location system and its implementation scheme. It describes the infrared communication interface protocol of this demo system, and brings forward the status transform diagram used by the protocol. It mainly analyses the theories and methods of the location algorithm used by the demo system, and builds its channel model. Meanwhile, it analyses the testing results in the micro-cellular condition. With this it shows that this scheme accomplishes the mobile telephone relative position calculating using wireless cellular system, and will more perfectly acquire the absolute position of the mobile phone, so eventually complete the location tracing.Key words location technology; communication interface protocol; location arithmetic; two-slope model
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