FFH-OFDM预编码矩阵的分析和改进  

Analysis and improvement of pre-coding matrix in FFH-OFDM

作　　者：钱璟[1] 张申如[2] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007 [2]解放军理工大学理学院,江苏南京210007

出　　处：《电路与系统学报》2008年第6期133-135,132,共4页Journal of Circuits and Systems

摘　　要：快速跳频正交频分复用(FFH-OFDM)在常规的OFDM符号中加入快速跳频预编码矩阵(FFH),使其在多径时变的衰落环境下具有良好的抗衰落性能[1]。本文首先对循环预编码矩阵带来的噪声半混合进行了分析,并进一步提出了噪声全混合的预编码矩阵,分析了其误码率。仿真结果表明,频率选择性信道下,在高信噪比时全混合较之半混合预编码矩阵进一步提高了OFDM系统抗衰落的能力。FFH-OFDM combines fast frequency hopping （FFH） with regular OFDM symbols, and it shows better performance in anti-fading of time-varying multi-path. This paper analyses half hybrid noise of the circulant pre-coding matrix, then proposes full hybrid noise pre-coding matrix and discusses its bit error rate. The simulation results show that on frequency- selective channels, full hybrid pre-coding matrix can further improve the BER performance at a high SNR.

关 键 词：快速跳频 正交频分复用 预编码矩阵 噪声混合 

分 类 号：TN929.5[电子电信—通信与信息系统]