WCDMA信号检测与参数估计  

Detection and parameter estimation of WCDMA signal

作　　者：高洪兴[1] 张天骐[1] 陈适[1] 何丹娜[1] 

机构地区：[1]重庆邮电大学信号与信息处理重庆市重点实验室,重庆400065

出　　处：《电子技术应用》2013年第1期100-104,108,共6页Application of Electronic Technique

基　　金：国家自然科学基金项目(61071196;61102131);教育部新世纪优秀人才支持计划项目(NCET-10-0927);信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003);重庆市杰出青年基金项目(CSTC2011jjjq40002);重庆市自然科学基金项目(CSTC2009BB2287;CSTC2010BB2398;CSTC2010BB2409;CSTC2010BB2411)

摘　　要：针对低信噪比下WCDMA信号检测与伪码(OVSF码)周期检测的难题,利用四阶累积量能够有效抑制高斯白噪声和二次谱具有明显谱峰的特性,提出了一种基于四阶累积量和二次谱相结合的WCDMA信号盲检测方法。该方法首先利用四阶累积量的切片检测出WCDMA信号,并估计得到WCDMA信号的采样率,接着通过二次谱算法所得到的谱峰间的距离来估计出OVSF码的周期参数。计算机仿真结果表明,该算法可以有效地对WCDMA信号进行检测并估计OVSF码周期。According to WCDMA signal detection and pseudo code （ OVSF code） cycle testing problem in the lower SNR, with using fourth-order cumulant can effectively inhibit the Gauss white noise and reprocessing power spectrum has obvious characteris- tics of spectral peak, it is proposed one method which is based on the fourth-order cumulant and reprocessing power spectrum to detect WCDMA signal. The method firstly uses fourth-order cumulant slice to detect WCDMA signal, and estimate the WCDMA signal sampling rate. Then through the reprocessing power spectral algorithm with the spike pulse distance to estimate the OVSF code cycle parameters. Computer simulation results show that the algorithm can be effectively to detect the WCI）MA signal and esti- mate the OVSF code period.

关 键 词：WCDMA信号 OVSF码周期 四阶累积量 二次谱 

分 类 号：TN911.7[电子电信—通信与信息系统]