重叠剪切法频域均衡固有误差分析及其改进方法

许国平; 何维; 张欣; 杨大成

doi:10.3724/SP.J.1146.2007.00304

重叠剪切法频域均衡固有误差分析及其改进方法

doi: 10.3724/SP.J.1146.2007.00304

许国平^{①③ 何维,},
何维,
张欣,
杨大成

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- 被引次数: 0
出版历程
- 收稿日期: 2007-03-01
- 修回日期: 2007-09-12
- 刊出日期: 2008-09-19

Analysis of Inherent Error of Overlap-Cut Method Frequency Domain Equalization and Relating Improvements

Xu Guo-Ping^{①③ 何维
,},
He Wei,
Zhang Xin,
Yang Da-Cheng

摘要

摘要: 该文提出了降低CDMA下行重叠剪切(OC)法频域均衡接收机计算复杂度的方法。基于FFT/IFFT变换的频域均衡算法，可以将均衡器简化成单抽头的结构，复杂度大大低于时域均衡算法。通过分析OC法频域均衡接收机系统固有误差的产生原因和分布特点，提出了对OC法的改进方法。理论分析和仿真结果都表明：改进后的频域均衡接收机，在计算复杂度降低的情况下，可以取得比原有频域均衡算法更好的性能。
- CDMA /
- 频域均衡 /
- 循环卷积 /
- 线性卷积 /
- 重叠剪切法
Abstract: A modification is proposed to reduce the complexity of Overlap-Cut (OC) method Frequency Domain Equalization (FDE) in Code Division Multiple Access (CDMA) downlink systems. FDE based on Fast Fourier Transform/Inverse Fast Fourier Transform (FFT/IFFT) carries out single-tap equalization on received signal, moreover, its complexity is much lower than its time-domain counterpart. The analysis for the generation and the distribution of the inherent error of OC method FDE indicates some improvement to the equalizer. As a result of both theoretical analysis and simulation, a better performance is obtained with lower computation burden than conventional algorithms.
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参考文献(1)

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