基于RSS-IWLS的认知无线电系统主用户定位算法  

Primary user positioning algorithm RSS-IWLS-based in cognitive radio systems

作　　者：李洪兵[1] 陈斌斌[2] 廖玉祥[1] 冯文江[2] 

机构地区：[1]国网重庆市电力公司江北供电分公司,重庆401120 [2]重庆大学通信工程学院,重庆400044

出　　处：《计算机工程与应用》2016年第2期146-150,共5页Computer Engineering and Applications

基　　金：国家电网公司科技项目资助(No.2013渝电科技36#)

摘　　要：在认知无线电系统中,主用户定位是执行无线传输场景分析,进而共享主用户频谱资源,提供基于位置辅助业务的前提条件。针对主用户发射信号功率未知情况,提出一种基于接收信号强度的改进加权最小二乘(RSS-IWLS)算法实现在对主用户定位的同时估计其发送功率。该算法综合考虑路径损耗、阴影效应和信道噪声对定位精度的影响。仿真结果表明,执行RSS-IWLS算法获得的主用户位置估计精度比基于接收信号强度的最小二乘算法更高。In this paper, it proposes a novel primary user positioning algorithm RSS-IWLS-based to estimate the position and transmission power of the primary user at the same time in cognitive radio systems. The proposed algorithm considers the practical factors not only path loss but also shadowing effect and channel noise that affect the estimation accuracy. The simulation results show that the proposed algorithm is better than RSS-LS algorithm in estimation accuracy.

关 键 词：认知无线电系统 主用户定位 接收信号强度 加权最小二乘算法 

分 类 号：TN92[电子电信—通信与信息系统]