基于TDL信道模型的CDMA导频信号检测  

The CDMA pilot signal detection based on TDL channel model

作　　者：屈保平[1] 王华剑[1] 景占荣[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710129

出　　处：《陕西科技大学学报（自然科学版）》2012年第4期93-96,共4页Journal of Shaanxi University of Science & Technology

基　　金：航天支撑技术基金(N7CH0004);航天科技创新基金(N7CH0003)

摘　　要：针对利用CDMA导频信号无源定位问题,建立节拍延迟线(TDL)信道模型,并利用贝叶斯线性模型建立了基于奈曼-皮尔逊(NP)准则的最佳检验统计量,同时根据导频信号的特性并利用数学工具使其在允许条件下最简化.然后构建了基于相关接收理论的最佳检测系统,以信噪比的渐变为参变量,求解接收机检测概率、虚警概率的解析表达式,并对系统检测性能进行仿真,并与瑞利信道进行比较.仿真结果表明,相同条件下TDL信道好于瑞利信道,当信噪比达到20dB时,信道模型具有理想的检测性能.The paper establishs TDL channel model about multi-path transmission,and get the best test statistics based on NP criteria and white gauss nosie.According to the characteristics of pilot signal and by the use of mathematical tools it was simplified.Then the paper establishs the best test detection system based on related theory.When using signal noise rate as variable,it can be gained for the analytical expression of the probability of detection and the false probability of receiver.Finally the paper simulates to the detection performance of system.Comparisons is made with Rayleigh channel.Simulation shows that the TDL channel outperforms Reyleigh channel in the same condition and the channel model has a ideal performance of detection when the received SNR is over 20 dB.

关 键 词：TDL信道模型 最佳统计量 检测概率 

分 类 号：TN914[电子电信—通信与信息系统]