SC-FDE散射通信系统MMSE-HDFE-RISIC均衡

doi:10.19665/j.issn1001-2400.2022.05.003

西安电子科技大学学报 ›› 2022, Vol. 49 ›› Issue (5): 18-24.doi: 10.19665/j.issn1001-2400.2022.05.003

SC-FDE散射通信系统MMSE-HDFE-RISIC均衡

刘刚(),庞翔云(),陈镇涛(),郭漪()

西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安 710071

收稿日期:2022-01-18 出版日期:2022-10-20 发布日期:2022-11-17
作者简介:刘刚(1977—),男,副教授,博士,E-mail:lgliu@163.com；|庞翔云(1998—),男,西安电子科技大学硕士研究生,E-mail:954978105@qq.com；|陈镇涛(1997—),男,西安电子科技大学硕士研究生,E-mail:2218015829@qq.com；|郭漪(1977—),女,副教授,博士,E-mail:guoyi402@163.com
基金资助:
国家自然科学基金(62171354)

MMSE-HDFE-RISIC equalization for SC-FDE scatter communication systems

LIU Gang(),PANG Xiangyun(),CHEN Zhentao(),GUO Yi()

State Key Laboratory of Integrated Services Networks,Xidian University,Xi’an 710071,China

Received:2022-01-18 Online:2022-10-20 Published:2022-11-17

摘要/Abstract

摘要：

对流层散射通信作为一种超视距通信方式,因为保密性强、抗干扰强等,是未来战场的主要通信手段之一。单载波频域均衡技术能够有效解决功放发射峰值功率受限与信号多径衰落问题,在对流层散射通信中广泛应用。然而SC-FDE系统中,频域均衡后的残留码间干扰会严重影响散射通信系统的误码性能。针对这一问题,基于最小均方误差准则,提出了一种适用于SC-FDE散射通信系统的MMSE-HDFE-RISIC均衡算法。该算法基于混合判决反馈均衡算法,通过频域估计残留码间干扰,再时域求和补偿,进一步减少了残留码间干扰对系统性能的影响。仿真分析表明,提出算法在散射信道下具有良好的误码性能。在QPSK调制下,以最小均方差来衡量,频域均衡算法性能提升约2.9 dB,相比传统混合判决反馈均衡算法性能提高约1 dB;在16QAM调制下,频域均衡算法的最小均方差性能提升约1.3 dB,相比传统混合判决反馈均衡算法性能提高约0.6 dB。

关键词: 散射通信, SC-FDE系统, MMSE-HDFE-RISIC均衡

Abstract:

Tropospheric scatter communication,as an over-the-horizon communication method,is one of the main communication means in the future battlefield because of its high secrecy and interference resistance.Single carrier frequency domain equalization technology can effectively solve the problem of amplifier transmit peak power limitation and signal multipath fading,and is widely used in tropospheric scatter communication.However,in the SC-FDE systems,the residual inter-symbol interference after the frequency domain equalization can seriously affect the bit error rate (BER) performance of the scatter communication systems.To solve this problem,this paper proposes an MMSE-HDFE-RISIC equalization algorithm based on the minimum mean square error criterion for the SC-FDE scatter communication systems.The algorithm is based on the hybrid decision feedback equalization algorithm,which further reduces the impact of residual inter-symbol interference on the system performance by estimating the residual inter-symbol interference in the frequency domain and then summing up the compensation in the time domain.Simulation analysis shows that the proposed algorithm has a good BER performance under the scattering channel.Under QPSK modulation,the performance improvement is 2.9 dB compared to the MMSE frequency domain equalization algorithm and about 1 dB compared to the traditional hybrid decision feedback equalization algorithm.Under 16QAM modulation,the performance improvement is 1.3 dB compared to the MMSE frequency domain equalization algorithm and about 0.6 dB compared to the traditional hybrid decision feedback equalization algorithm.

Key words: scatter communication, SC-FDE, MMSE- HDFE-RISIC equalization

中图分类号:

TN926.4

刘刚,庞翔云,陈镇涛,郭漪. SC-FDE散射通信系统MMSE-HDFE-RISIC均衡[J]. 西安电子科技大学学报, 2022, 49(5): 18-24.

LIU Gang,PANG Xiangyun,CHEN Zhentao,GUO Yi. MMSE-HDFE-RISIC equalization for SC-FDE scatter communication systems[J]. Journal of Xidian University, 2022, 49(5): 18-24.

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参考文献 13

[1]	张娅妹, 周林, 陈辰, 等. 瑞利衰落信道中SC-LDPC码滑窗译码算法[J]. 西安电子科技大学学报, 2020, 47(6):78-83.
	ZHANG Yamei, ZHOU Lin, CHEN Chen, et al. Sliding Window Decoding of the Spatially Coupled LDPC Code over Rayleigh Fading Channels[J]. Journal of Xidian University, 2020, 47(6):78-83.
[2]	ZHENG T, JING L, HE C, et al. A Novel Single Carrier Frequency Domain Equalization Method in Underwater Acoustic Communications[C]// 2021 IEEE International Conference on Signal Processing,Communications and Computing. Piscataway: IEEE, 2021:1-5.
[3]	LI Y, ZHANG W, JIANG R, et al. Adaptive Space-Frequency Equalization for SC-FDE Systems with Interference[J]. IEEE Access, 2019, 7:74149-74156. doi: 10.1109/ACCESS.2019.2918616
[4]	EKMEKCI N H. Adaptive Frequency-Domain Equalizer Structure for SC-FDE Systems in Fast-Fading Channels[C]// 2018 26th Signal Processing and Comm4unications Applications Conference. Piscataway: IEEE, 2018:1-4.
[5]	廖勇, 孙宁, 王帅, 等. 面向LTE-V2X系统的双迭代信号检测算法[J]. 西安电子科技大学学报, 2021, 48(3):1-8.
	LIAO Yong, SUN Ning, WANG Shuai, et al. Algorithm for Detection of Twice Iterative Signals for LTE-V2X Systems[J]. Journal of Xidian University, 2021, 48(3):1-8.
[6]	CHANG-YING L. Compatibility Design of Tactical Communication Based on OFDM and SC-FDE[C]// 2018 4th Annual International Conference on Network and Information Systems for Computers. Piscataway: IEEE, 2018:101-103.
[7]	PEDROSA P, DINIS R, CASTANHEIRA D, et al. Joint Channel Equalization and Tracking for SC-FDE Schemes[C]// 2019 IEEE 90th Vehicular Technology Conference. Piscataway: IEEE, 2019:1-6.
[8]	WITSCHNIG H, KEMPTNER M, WEIGEL R, et al. Decision Feedback Equalization for a Single Carrier System With Frequency Domain Equalization-An Overall System Approach[C]// 1st International Symposium on Wireless Communication Systems,2004. Piscataway: IEEE, 2004:26-30.
[9]	BENVENUTO N, TOMASIN S. Iterative Design and Detection of a DFE in the Frequency Domain[J]. IEEE Transactions on Communications, 2005, 53(11):1867-1875. doi: 10.1109/TCOMM.2005.858666
[10]	BENVENUTO N, DINIS R, FALCONER D, et al. Single Carrier Modulation with Nonlinear Frequency Domain Equalization:An Idea Whose Time Has Come—Again[J]. Proceedings of the IEEE, 2009, 98(1):69-96. doi: 10.1109/JPROC.2009.2031562
[11]	Al-IESAWI S A. Iterative Hybrid Decision-Feedback Equalization (HDFE) Based Single-Carrier IDMA Schemes[C]// 2013 Sixth International Conference on Developments in Systems Engineering. Piscataway: IEEE, 2013:69-72.
[12]	杨志, 刘泽民. SC-FDE系统的一种新型判决反馈均衡器[J]. 半导体技术, 2007,(9):800-803.
	YANG Zhi, LIU Zemin.A Novel Decision Feedback Equalizer for SC-FDE System[J]. Semiconductor Technology, 2007(9):800-803.
[13]	QI Y, CHEN X, XIE Z, et al. An Improved MMSE-RISIC Equalization Algorithm Based on STBC-SC-FDE[C]// 2018 IEEE 3rd International Conference on Signal and Image Processing. Piscataway: IEEE, 2018:310-314.

SC-FDE散射通信系统MMSE-HDFE-RISIC均衡

MMSE-HDFE-RISIC equalization for SC-FDE scatter communication systems

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路径	1	2	3	4	5	6	7
时延/ns	0	8.3	170.0	250.0	330.0	420.0	500.0
功率衰减/dB	-10	-3	0	-2	-5	-8	-10
多普勒频移/Hz	10	10	10	10	10	10	10