一种降低OFDM移动通信系统中LS信道估计均方误差的算法

李国松; 周正欧

一种降低OFDM移动通信系统中LS信道估计均方误差的算法

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出版历程
- 收稿日期: 2004-04-12
- 修回日期: 2005-02-07
- 刊出日期: 2005-09-19

An Algorithm to Reduce MSE of LS Channel Estimation in Mobile OFDM System

摘要

摘要: 在基于OFDM的移动通信系统中,针对LS信道估计时域结果的构成特点,同时结合无线信道冲激响应在时域为有限持续长度的特性,提出一种新的算法估计信道有效阶数,然后利用该估计值对LS信道估计时域结果进行加窗处理以减小LS算法中由噪声和子信道间干扰引起的均方误差:LS算法性能的提高及其对系统误符号性能的改善通过计算机仿真得以验证.
- OFDM; 信道估计; 有效阶数; LS算法
Abstract: In mobile OFDM system, this paper pays much attention to the character of time domain result of LS channel estimation. At the same time, it is noticed that the character of Channel Impulse Response （CIR） is finite impulse response. A new algorithm is proposed to estimate channel effective order, and then the estimated value is used to truncate the time-domain result of channel estimation achieved by LS algorithm in order to reduce Mean Square Error （MSE） of LS algorithm due to noise and Inter-Carrier Interference （ICI）. Performance improvement of LS algorithm and its enhancement on Symbol Error Rate （SER） have been evaluated by computer simulation.

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参考文献(1)

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