并行级联频域判决反馈(DFE)均衡策略及不匹配译码

李强; 李少谦

doi:10.3724/SP.J.1146.2007.00491

并行级联频域判决反馈(DFE)均衡策略及不匹配译码

doi: 10.3724/SP.J.1146.2007.00491

李强,
李少谦

基金项目:

国家自然科学基金(60496313，60502010)资助课题

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- 被引次数: 0
出版历程
- 收稿日期: 2007-04-02
- 修回日期: 2007-09-19
- 刊出日期: 2008-10-19

Mismatched Detection of Turbo Block DFE Using Parallel Concatenated Scheme

摘要

摘要: 该文提出了一种使用并行级联的turbo类型判决反馈均衡器(DFE)结构，用于抑制线性码间干扰。基于该结构又提出了一种低复杂度的基于频域迭代块判决反馈检测(Turbo Block DFE, TBDFE)算法。该并行策略比传统的块迭代判决反馈均衡算法(Iterative Block DFE, IBDFE)有更大的性能增益，且在信道估计存在相同的一定误差时，该结构与IBDFE的性能增益比没有估计误差时更大。该文还研究了SNR估计误差对TBDFE算法与传统IBDFE算法的影响，结果表明二者对SNR的过估计比欠估计均为敏感。
- 频域均衡 /
- 块迭代DFE /
- 并行级联 /
- ISI
Abstract: A turbo-type scheme that uses parallel concatenation and Turbo Block Decision Feedback Equalization (TBDFE) is proposed for transmission over linear intersymbol interference channels. The scheme can offer significant improvement in performance. However, the performance gain is even higher when the detector uses an imperfect channel estimate. In the case of SNR mismatch, both TBDFE and IBDFE algorithms are more sensitive to SNR overestimation than underestimation.
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