Mismatched finite-complexity MMSE decision feedback equalizers
Mismatched finite-complexity MMSE decision feedback equalizers
复制标题
不匹配的有限复杂度 MMSE 决策反馈均衡器
DOI：
--
复制
发表时间：
1997
影响因子：
5.4
通讯作者：
J. Cioffi
中科院分区：
文献类型：
--
作者：
N. Al;J. Cioffi
推导了有限长最小均方误差判决反馈均衡器(MMSE-DFE)由于信道和噪声失配条件而导致的判决点信噪比下降的闭合表达式。分析进一步扩展到其他接收机结构，即具有自适应前馈滤波器的MMSE-DFE、MMSE线性均衡器和离散多音收发机，所有这些都是在有限复杂性约束下的。并对无限长滤光片的极限情况进行了分析。此外，我们给出了计算机模拟结果，比较了所研究的各种接收器结构的性能，假设高比特率数字用户环路环境的特定信道和噪声失配模型。最后，概述了几种可以用来减轻失配影响的方法。
Closed-form expressions that quantify the degradation in the decision-point signal-to-noise ratio of the finite-length minimum mean-square-error decision feedback equalizer (MMSE-DFE) due to channel and noise mismatch conditions are derived. The analysis is further extended to other receiver structures, namely, the MMSE-DFE with an adaptive feedforward filter, the MMSE linear equalizer, and the discrete multitone transceiver, all under a finite-complexity constraint. The limiting case of infinite-length filters is also analyzed. In addition, we present computer simulation results that compare the performance of the various receiver structures under study, assuming a particular channel and noise mismatch model for the high-bit-rate digital subscriber loop environment. Finally, several methods that can be used to mitigate the effects of mismatch are outlined.