TWA-based channel estimation for CO-OFDM systems  

作　　者：李莉 吴迪 韩力 胡贵军 

机构地区：[1]College of Communication Engineering, Jilin University [2]College of Physics, Jilin University

出　　处：《Optoelectronics Letters》2014年第2期133-136,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61177066)

摘　　要：An efficient channel estimation method called time-domain weighted average(TWA) algorithm is proposed for coherent optical orthogonal frequency division multiplexing(CO-OFDM) systems. On the premise of calculating the associated weight of channel transfer function, a more exact channel characteristic is obtained by calculating the weighted average of the pilot transfer function in this algorithm. Compared with time-domain average(TA) algorithm, the TWA algorithm can reach the same bit error rate(BER) with fewer pilots, and it improves the performance of CO-OFDM systems.An efficient channel estimation method called time-domain weighted average （TWA） algorithm is proposed for coherent optical orthogonal frequency division multiplexing （CO-OFDM） systems. On the premise of calculating the associated weight of channel transfer function, a more exact channel characteristic is obtained by calculating the weighted average of the pilot transfer function in this algorithm. Compared with time-domain average （TA） algorithm, the TWA algorithm can reach the same bit error rate （BER） with fewer pilots, and it improves the performance of CO-OFDM systems.

关 键 词：OFDM系统 信道估计 加权平均值 正交频分复用 时域平均 A算法 估计方法 传递函数 

分 类 号：TN929.1[电子电信—通信与信息系统]