A Novel Spatial Diversity Equalizer Based on Frequency-Domain Waveform Combining

doi:10.3969/j.issn.0372-2112.2018.05.015

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A Novel Spatial Diversity Equalizer Based on Frequency-Domain Waveform Combining

更新时间：2025-07-08

- A Novel Spatial Diversity Equalizer Based on Frequency-Domain Waveform Combining
- Acta Electronica Sinica Vol. 46, Issue 5, Pages: 1121-1127(2018)
- 作者机构：
  
  解放军信息工程大学信息系统工程学院,河南,郑州,450002
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61501517)
- DOI：10.3969/j.issn.0372-2112.2018.05.015
  CLC： TN911.7
- Published Online：25 May 2018，
  
  Published：2018
- 稿件说明：
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A Novel Spatial Diversity Equalizer Based on Frequency-Domain Waveform Combining[J]. Acta Electronica Sinica, 2018, 46(5): 1121-1127.
DOI：

A Novel Spatial Diversity Equalizer Based on Frequency-Domain Waveform Combining[J]. Acta Electronica Sinica, 2018, 46(5): 1121-1127. DOI： 10.3969/j.issn.0372-2112.2018.05.015.

摘要

针对频率选择性衰落信道下的多天线盲接收问题，本文提出了一种新的合成器-均衡器盲空间分集均衡器结构.基于频域波形合成、均衡器与软符号信息的联合处理框架，首先设计了频域BLOCK-SUMPLE迭代算法，对多路信号频域合成权值进行联合估计，实现频率选择性衰落信道下的波形合成.在此基础上，利用均衡器输出软符号信息重构合成参考，对权值相位予以修正，实现对等效合成信道的优化补偿.与传统盲空间分集均衡算法相比，上述算法实现无需训练序列辅助，并且优化了信号分集合并性能，降低了均衡器的设计难度.仿真结果表明，采用新型结构可有效改善衰落信道下的盲接收效果，逼近最佳空间分集均衡器性能.

Abstract

A novel combiner-equalizer structure of blind Spatial Diversity Equalizer (SDE) is proposed for blind reception of multi-antenna system under frequency-selective fading channels.Three key components

i.e.frequency waveform combiner

equalizer and soft information recycler are jointly processed under this new structure.An iterative BLOCK-SUMPLE algorithm is designed first to calculate weight values for multi-antenna signals

with frequency waveform combining implemented afterwards.In order to compensate and optimize the equivalent synthesis channel

soft symbols from the equalizer output are fed back and functioned as a new reference to adjust the weight phases.Compared with traditional blind SDEs

no prior symbol information is required during the implementation.The proposed structure also improves diversity combining performance and reduces the design complexity of equalizer at the same time.Simulation results show that this new structure effectively improves the reception capability under fading channels and it performs closely to the optimal Spatial Diversity Equalizers.

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