基于频域波形合成的盲空间分集均衡器设计

doi:10.3969/j.issn.0372-2112.2018.05.015

电子学报 ›› 2018, Vol. 46 ›› Issue (5): 1121-1127.DOI: 10.3969/j.issn.0372-2112.2018.05.015

基于频域波形合成的盲空间分集均衡器设计

陈紫阳, 胡赟鹏, 沈智翔, 沈彩耀

解放军信息工程大学信息系统工程学院, 河南郑州 450002

收稿日期:2016-09-08 修回日期:2017-11-26 出版日期:2018-05-25
- 通讯作者:
- 沈智翔
- 作者简介:
- 陈紫阳 女,1992年出生,湖北随州人,硕士研究生,主要研究方向为通信信号处理.E-mail:mareo126@126.com;胡赟鹏 男,1978年出生,江西南昌人,博士,副教授,主要从事无线通信、通信中的信号处理方面的研究.E-mail:hyp1978@126.com
- 基金资助:
- 国家自然科学基金 (No.61501517）

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

CHEN Zi-yang, HU Yun-peng, SHEN Zhi-xiang, SHEN Cai-yao

PLA Information Engineering University, Zhengzhou, Henan 450002, China

Received:2016-09-08 Revised:2017-11-26 Online:2018-05-25 Published:2018-05-25
- Corresponding author:
- 沈智翔
- Supported by:
- National Natural Science Foundation of China (No.61501517)

摘要/Abstract

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.

关键词: 衰落信道, 空间分集均衡器, 频域波形合成

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.

Key words: fading channels, spatial diversity equalizer, frequency-domain waveform combining

中图分类号:

TN911.7

陈紫阳, 胡赟鹏, 沈智翔, 等. 基于频域波形合成的盲空间分集均衡器设计[J]. 电子学报, 2018, 46(5): 1121-1127.

CHEN Zi-yang, HU Yun-peng, SHEN Zhi-xiang, et al. A Novel Spatial Diversity Equalizer Based on Frequency-Domain Waveform Combining[J]. Acta Electronica Sinica, 2018, 46(5): 1121-1127.

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基于频域波形合成的盲空间分集均衡器设计

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

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