严格采样FMT系统频域均衡算法  

Frequency-domain equalization algorithm in critical-sampled FMT system

作　　者：钟华[1,2] 郑林华[1] 金国平[1] 丁宏[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院 [2]95746部队

出　　处：《电路与系统学报》2010年第3期54-58,共5页Journal of Circuits and Systems

摘　　要：根据滤波多音调制(FMT)系统基本原理推导了严格采样FMT系统的矩阵表示式,并针对严格采样FMT系统符号间干扰(ISI)严重的问题,根据最小均方误差准则提出了一种子信道频域均衡算法,给出了新算法的最小二乘迭代实现。仿真结果表明,新算法能有效均衡FMT信号,相比较于判决反馈均衡(DFE)算法,新算法的实现结构更简单并且误码率性能更好。According to the theory of filtered multitone modulation （FMT）, the matrix representations of critical-sampled FMT system is deduced in this paper and a subchannel frequency-domain equalization algorithm is proposed to eliminate the intersymbol interference（ISI） in critical-sampled FMT system. The least square iterative realization of this new algorithm is also presented. Simulation results indicate that the proposed algorithm can effectively equalize the FMT signal, the realization of the proposed algorithm is simpler than that of the previously proposed DFE equalization algorithm and the bit error ratio（BER） performance of the proposed algorithm is also better than that of the DFE equalization algorithm.

关 键 词：均衡 滤波多音调制 符号间干扰 最小均方误差 

分 类 号：TN911.5[电子电信—通信与信息系统]