一种改进的基于MMSE准则信道缩短算法  

An Improved Optimal Channel Shortening Algorithm Based on MMSE

作　　者：刘水生[1] 沈元隆[2] 

机构地区：[1]南京烟草专卖局信息中心,江苏南京210003 [2]南京邮电大学,江苏南京210000

出　　处：《电力系统通信》2011年第6期58-61,共4页Telecommunications for Electric Power System

摘　　要：在离散多音调制/正交频分复用系统中,采用接收端的时域均衡器来缩短信道的冲击响应长度,使得不大于循环前缀的长度,从而来消除ISI/ICI。很多学者给出不少计算最优缩短冲激响应均衡器抽头系数的算法,在这些算法中,要求时域均衡器的抽头长度必须小于或者等于目标冲激响应的记忆长度。文章提出了改进算法克服上述局限性,不仅可以用来计算任意长度时域均衡器的抽头系数,而且计算量显著减少。In discrete multitone （DMT） modulation systems, the time-domain equalizer （TEQ） at the receiver front-end is used to overcome the ICI/ISI caused by the inadequate CP length. A algorithm used to calculated the coefficients of the optimal shortening time domain equalizer （TEQ） was given by some experts, which requires that the length of the TEQ must be smaller than or equal to the memory length of the target impulse response. This paper modifies this algorithm and makes it not only suitable for calculating the coefficients of the TEQ with arbitrary length, but also have a much lower computational time.

关 键 词：时域均衡 离散多音调制 循环前缀 信道缩短 

分 类 号：TN911[电子电信—通信与信息系统]