敘述了基于GSM網(wǎng)絡(luò)的定位系統(tǒng)的系統(tǒng)框架及實(shí)現(xiàn)方案，分析了定位演示系統(tǒng)的紅外通信接口協(xié)議及協(xié)議所采用的狀態(tài)轉(zhuǎn)換原理圖；討論了定位演示系統(tǒng)定位算法的原理和方法，建立了定位演示系統(tǒng)所采用的信道模型；同時(shí)給出了在微小區(qū)環(huán)境下的測試結(jié)果。結(jié)果表明：該方案能通過無線蜂窩系統(tǒng)完成手機(jī)相對位置計(jì)算，并結(jié)合電子地圖很好地得到手機(jī)的絕對位置，最終完成了定位跟蹤。
關(guān) 鍵 詞 定位技術(shù); 通信接口協(xié)議; 定位算法; 雙斜率模型

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