基于二维DCT的LS信道估计  

2D-DCT based on LS Channel Estimation

作　　者：边刚[1] 刘汉奎[1] 郝希准[1] 杨柳[1] 

机构地区：[1]西华师范大学物理与电子信息学院,四川南充637009

出　　处：《西华师范大学学报（自然科学版）》2009年第4期379-382,共4页Journal of China West Normal University(Natural Sciences)

基　　金：四川省教育厅重点实验室专项资金资助项目(2006ZD026)

摘　　要：把二维DCT变换引入传统的LS信道估计算法,提出了一种基于DCT2/IDCT2的OFDM系统信道估计方法.通过对具有瑞利衰落信道的典型OFDM系统仿真,该算法性能比传统的LS算法有明显提高,尤其在低信噪比时该方法对系统性能提升更为突出,并研究了该算法性能受插值方法和多普勒频移的影响.By introducing the 2D discrete cosine transform （DCT） into the traditional least square （LS） channel estimation, a novel DCT2/IDCT2-based channel estimation is proposed in orthogonal frequency division multiplexing （0FDM） system. A typical OFDM system with Rayleigh Fading channel is simulated. It is concluded that the proposed channel estimation performs better than the traditional LS. In addition, the improvement of system performanee is very obvious when the signal to noise ratio （ SNR ） is low. Furthermore, the influenees Of interpolation method and the Doppler frequency shift on the performance of the proposed channel estimator are investigated.

关 键 词：DCT LS 信道估计 正交频分复用 仿真 

分 类 号：TN914[电子电信—通信与信息系统]