符号间干扰信道的迭代均衡合成算法

doi:10.3969/j.issn.1001-2400.2015.05.024

J4 ›› 2015, Vol. 42 ›› Issue (5): 139-146.doi: 10.3969/j.issn.1001-2400.2015.05.024

符号间干扰信道的迭代均衡合成算法

乔良;郑辉

(盲信号处理重点实验室, 四川成都 610041)

收稿日期:2014-05-20 出版日期:2015-10-20 发布日期:2015-12-03
通讯作者: 乔良
作者简介:乔良(1984-)，男，盲信号处理重点实验室博士研究生，E-mail: lqiao57s@163.com．
基金资助:
国家自然科学基金资助项目(61172140)

Iterative equalization combining algorithm in intersymbol interference channel

QIAO Liang;ZHENG Hui

(National Key Lab. of Science and Technology on Blind Signal Processing, Chengdu 610041, China)

Received:2014-05-20 Online:2015-10-20 Published:2015-12-03
Contact: QIAO Liang

摘要/Abstract

摘要：

针对符号间干扰信道的多天线分集接收问题，提出了一种迭代均衡合成算法．该算法不需要借助复杂的信噪比估计方法，而是直接利用分集支路迭代均衡的相关参数计算合成权值，以进行均衡符号的合成；并将译码输出的外信息反馈至分集支路，在译码器和支路均衡器之间迭代交换软信息．外信息传递图分析和计算机仿真结果均表明，所提算法充分利用了多径时域信息和多天线空域信息，能够有效提升接收系统抗严重符号间干扰的能力．

关键词: 空间分集, Turbo均衡, 符号间干扰, 外信息传递图

Abstract:

To realize joint optimization of spatial diversity and equalization combining in the intersymbol interference (ISI) channel, an iterative equalization combining algorithm is proposed. The proposed algorithm uses the coefficients of Turbo equalization to calculate the combination weights without estimating the signal to noise ratio in each diversity branch. The equalized symbols from different diversity branches are combined, and the extrinsic information output from the decoder is fed back to the equalizers, so as to exchange soft information between the equalizers and the decoder. The performance of the proposed algorithm is analyzed using the extrinsic information transfer (EXIT) chart and verified by simulations. Results show that our approach fully exploits time domain information from the multipath channel and spatial domain information from multi receiving antennas, which efficiently improve the performance of the receiver in the severe ISI channel.

Key words: spatial diversity, Turbo equalization, intersymbol interference, extrinsic information transfer(EXIT) chart

中图分类号:

TN911.5

乔良;郑辉. 符号间干扰信道的迭代均衡合成算法[J]. J4, 2015, 42(5): 139-146.

QIAO Liang;ZHENG Hui. Iterative equalization combining algorithm in intersymbol interference channel[J]. J4, 2015, 42(5): 139-146.

参考文献

［1］ Scott K, Olasz E B, Sendyk A. Diversity Combining with MLSE Equalization［J］. IEE Proceedings of Communications, 1998, 145(2): 105-108.
［2］沈彩耀, 于宏毅, 胡赟鹏. 频率选择性信道下的多天线信号分量合成算法［J］. 信息工程大学学报, 2012, 13(1): 48-53.
Shen Caiyao, Yu Hongyi, Hu Yunpeng. Signal Components Combination Algorithm on a Multi-antennas Array for Frequency Selective Channels［J］. Journal of Information Engineering University, 2012, 13(1): 48-53.
［3］罗柏文, 沈彩耀, 于宏毅. 采用余弦调制滤波器组的多径衰落信号子带合成［J］. 信号处理, 2013, 29(5): 537-543.
Luo Baiwen, Shen Caiyao, Yu Hongyi. Sub-band Combining for Multipath Fading Signals Using Cosine Modulated Filter Banks［J］. Signal Processing, 2013, 29(5): 537-543.
［4］ Coskun A, Kale I. Blind Correlation-based DFE Receiver for the Equalization of Single Input Multi Output Communication Channels［C］//2009 Wireless Telecommunications Symposium. Piscataway: IEEE Computer Society, 2009: 5068975.
［5］ Coskun A, Kale I. Blind Multidimensional Matched Filtering Techniques for Single Input Multiple Output Communications［J］. IEEE Transactions on Instrumentation and Measurement, 2010, 59(5): 1056-1064.
［6］ Douillard C, Jezequel M, Berrou C. Iterative Correction of Intersymbol Interference: Turbo Equalization［J］. European Transactions on Telecommunications, 1995, 6(5): 507-511.
［7］ Tüchler M, Koetter R, Singer A C. Turbo Equalization: Principles and New Results［J］. IEEE Transactions on Communications, 2002, 50(5): 754-767.
［8］ Tüchler M, Singer A C. Turbo Equalization: an Overview［J］. IEEE Transactions on Information Theory, 2011, 57(2): 920-952.
［9］ Otnes R, Tüchler M. Improved Receivers for Digital High Frequency Waveforms Using Turbo Equalization［C］//Proceedings of IEEE Military Communications Conference. New York: IEEE, 2002: 99-104.
［10］ Rafati A, Lou H, Xiao C. Soft-decision Feedback Turbo Equalization for LDPC-coded MIMO Underwater Acoustic Communications［J］. IEEE Journal of Oceanic Engineering, 2013, 39(1): 90-99.
［11］赵亮, 葛建华. 用于水声通信系统的迭代接收算法［J］. 西安电子科技大学学报, 2013, 40(1): 53-57.
Zhao Liang, Ge Jianhua. Iterative Receiver Algorithm for Underwater Acoustic Communications［J］. Journal of Xidian University, 2013, 40(1): 53-57.
［12］ Barhumi I. Decision Feedback Turbo Equalization for OFDM over Doubly Selective Channels［C］//IEEE Global Communications Conference. New York: IEEE, 2012: 3801-3806.
［13］ Wang Z, Huang J, Zhou S. Iterative Receiver Processing for OFDM Modulated Physical-layer Network Coding in Underwater Acoustic Channels［J］. IEEE Transactions on Communications, 2013, 61(2): 541-553.
［14］高梅, 黄国策, 杜栓义, 等. 用于短波高速数据传输的迭代合并均衡算法［J］. 系统工程与电子技术, 2013, 35(9): 1954-1960.
Gao Mei, Huang Guoce, Du Shuanyi. Iterative Combining-equalization Algorithm for High Data Rate HF Transmission［J］. Systems Engineering and Electronics, 2013, 35(9): 1954-1960.
［15］ Laot C, Le Bidan R. Adaptive MMSE Turbo Equalization with High-order Modulations and Spatial Diversity Applied to Underwater Acoustic Communications［C］//17th European Wireless Conference. Offenbach: VDE Verlag, 2011: 488-493.
［16］许华, 王爱粉, 杨晓宇. 常规数字通信信号信噪比估计综述［J］. 信号处理, 2013, 29(6): 723-733.
Xu Hua, Wang Aifen, Yang Xiaoyu. Survey of the SNR Estimation of Conventional Digital Communication Signals［J］. Signal Processing, 2013, 29(6): 723-733.
［17］ Brink S. Convergence Behavior of Iteratively Decoded Parallel Concatenated Codes［J］. IEEE Transactions on Communications, 2001, 49(10): 1727-1737.
［18］ Eric M, Pierre D, Jean F C, et al. Subspace Methods for the Blind Identification of Multichannel FIR Filters［J］. IEEE Transactions on Signal Processing, 1995, 43(2): 516-525.

[1]	侯箫剑;许华;曾乐雅. 带有误差反馈结构的多天线变步长均衡算法[J]. 西安电子科技大学学报, 2017, 44(5): 158-164.
[2]	刘明骞;陈健;李兵兵;郭晓玲. 非合作通信中OFDM系统盲均衡方法[J]. 西安电子科技大学学报, 2016, 43(3): 1-5.
[3]	王秋才;袁超伟;张金波;李映雪. SC-FDMA上行系统中一种频域迭代块DFE均衡方法[J]. J4, 2013, 40(2): 25-30.
[4]	汪涵;朱磊基;施玉松;邢涛;王营冠. 利用循环前缀的OFDM系统定时同步算法[J]. J4, 2013, 40(1): 141-147.
[5]	曲咏哲;李玉山;闫旭;丁同浩;蒋冬初. 电感耦合连接器的均衡[J]. J4, 2012, 39(2): 192-199.
[6]	曲咏哲;李玉山;闫旭;丁同浩. 电容耦合连接器及其信号完整性分析[J]. J4, 2011, 38(5): 159-164.
[7]	周生华;刘宏伟;刘保昌;尹奎英. 信噪比加权空间分集雷达目标检测算法[J]. J4, 2011, 38(4): 82-88.
[8]	杨鹏;葛建华. 一种新型低复杂度的Turbo TCM迭代均衡译码结构及算法[J]. J4, 2006, 33(3): 411-415.

符号间干扰信道的迭代均衡合成算法

Iterative equalization combining algorithm in intersymbol interference channel

PDF (PC)

赞

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 8

Metrics

本文评价

推荐阅读 0