一种基于PCC训练符号的OFDM信道估计算法  

A Channel Estimation Algorithm for OFDM Based on PCC Training Symbols

作　　者：唐恬[1] 姜军[1] 张平[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876

出　　处：《北京邮电大学学报》2007年第4期37-40,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60302025)

摘　　要：分析了正交频分复用(OFDM)信道估计中的信道冲激响应(CIR)泄漏问题,提出了一种新的时域信道估计算法.使用多项式相消编码(PCC)训练符号进行信道估计,利用其频谱陡降的特点减少保护边带宽度,进而降低CIR泄漏.与已有的OFDM信道估计算法进行了比较,仿真结果证明,该算法极大降低了信道估计均方误差(MSE)值,改善了系统误码率(BER)性能.The leakage of channel impulse response （CIR） in channel estimation for the orthogonal frequency division multiplexing （OFDM） systems is analyzed. A channel estimation algorithm in time do- main is newly proposed. To overcome the leakage of CIR, the frequency guard bands are reduced by using the polynomial cancellation coding （PCC） training symbols . The symbols have fast spectral rolloff. Comparison has been done between the proposed algorithm and the existing channel estimation algorithms. Simulation results show the decreasing of channel estimation mean square （MSE） and the improvement of bit error rate （BER） performance by the proposed algorithm.

关 键 词：正交频分复用 信道估计 多项式相消编码 

分 类 号：TN929.5[电子电信—通信与信息系统]