利用判决抑制CDMA系统下行链路移动台定位中的多址干扰  

Using Decision to Suppress MAI of Downlink Positioning Signal in CDMA Mobile Communications Systems

作　　者：华云[1] 龚耀寰[1] 何芳[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都610054

出　　处：《电子学报》2003年第10期1456-1460,共5页Acta Electronica Sinica

摘　　要：本文深入分析了CDMA系统中利用下行链路信号进行移动台定位存在的多址干扰 (MAI)问题 .通过数学推导提出了一种判决算法 ,该算法可以计算出信号到达时间 (ToA)估计的准确程度 ,去除不可靠的测量结果 ,提高定位精度 .算法实现简单 ,仿真结果表明 。We first analyzed the effect of MAI in CDMA mobile communication when using downlink signal to position mobile station, and then proposed an algorithm through mathematical derivation. Using this algorithm we can calculate the reliability of the estimation of Time of Arrive of downlink signal, get rid of the result that is not reliable, and improve the veracity of location estimation. The algorithm is very simple. Simulation results demonstrate that the proposed algorithm can reduce error of location estimation very greatly.

关 键 词：CDMA 下行链路导频信号 MAI TDOA TOA 

分 类 号：N929.533[自然科学总论]