基于空时编码和干扰对齐的干扰消除方法

计算机科学 ›› 2015, Vol. 42 ›› Issue (10): 122-125.

基于空时编码和干扰对齐的干扰消除方法

孙江峰,田心记

河南理工大学计算机科学与技术学院焦作454004,河南理工大学计算机科学与技术学院焦作454004

出版日期:2018-11-14 发布日期:2018-11-14
基金资助:
本文受河南省高等学校矿山信息化重点学科开放实验室开放基金(KZ2012-03)资助

Interference Cancellation Method Based on Space-time Code and Interference Alignment

SUN Jiang-feng and TIAN Xin-ji

Online:2018-11-14 Published:2018-11-14

摘要/Abstract

摘要： 对于每个用户配置4根天线的X信道,提出了一种基于空时编码和干扰对齐的干扰消除方法。设计了4×4的速率为2的空时码字,并且在码字中引入零向量。首先通过干扰对齐将每个接收端接收到的非期望接收码字对齐,然后对接收信号进行线性操作以消除非期望接收的码字,最后对接收信号进行非线性运算使得期望接收的码字互不干扰。所提方案的自由度为16/3,分集增益为8。仿真结果显示,所提方案的可靠性优于相同场景中的已有方案。

关键词: X信道,空时编码,干扰对齐,自由度,分集增益

Abstract: An interference cancellation method based on space-time code and interference alignment was proposed for X channel with four antennas of each user.4×4 space-time codeword with coding rate being 2 was designed,and zero vectors were introduced into each codeword.Firstly,the unwanted codewords for each receiver are aligned by interference alignment.Then,the unwanted codewords are mitigated by linear operation on received signals.Finally,the wanted codewords are not interfering with each other by non-linear operation on received signals.The sum degrees of freedom and the diversity gain are 16/3 and 8 respectively.Simulation results show that the reliability of proposed scheme outperforms the existing scheme at the same scene.

Key words: X channel,Space-time code,Interference alignment,Degrees of freedom,Diversity gain

孙江峰,田心记. 基于空时编码和干扰对齐的干扰消除方法[J]. 计算机科学, 2015, 42(10): 122-125. https://doi.org/

SUN Jiang-feng and TIAN Xin-ji. Interference Cancellation Method Based on Space-time Code and Interference Alignment[J]. Computer Science, 2015, 42(10): 122-125. https://doi.org/

参考文献

[1] 田心记,倪水平,胡紫巍,等.MIMO-MAC中改进的空时码传输方案 [J].北京邮电大学学报,2013,36(4):95-98 Tian Xin-ji,Ni Shui-ping,Hu Zi-wei,et al.Improved Space-Time Coded Transmission Scheme for MZMO-MAC[J].Journal of Beijing University of Posts and Telecommunications,2013,36(4):95-98
[2] Gesbert D,Shafi M,Shiu D.From theory to practice:an overview of MIMO space-time coded wireless systems [J].IEEE Journal on Selected Areas in Communications,2003,21(3):281-302
[3] 田心记,李亚.X信道中新的空时码传输方案 [J].北京邮电大学学报,2014,31(7):99-102 Tian Xin-ji,Li Ya.New Space-Time Coded Transmission Scheme for X Channel[J].Journal of Beijing University of Posts and Telecommunications,2014,31(7):99-102
[4] Maddah-Ali M,Motahari A,Khandani A.Communication over MIMO X channels:Interference alignment,decomposition,and performance analysis [J].IEEE Transactions on Information Theory,2008,54(8):3457-3470
[5] Shi L,Zhang W,Xia X G.Space-Time Block Code Designs forTwo-User MIMO X Channels[J].IEEE Transactions on Communications,2013,61(9):3806-3815
[6] Rao X B,Ruan L Z,Lan K N.Csi feedback reduction for mimo interference alignment [J].IEEE Transactions on Signal Processing,2013,61(18):4428-4437
[7] Xie B,Li Y,Minn H,et al.Adaptive interference alignment with csi uncertainty [J].IEEE Transactions on Communications,2013,61(2):792-801
[8] Li L B,Jafarkhani H,Jafar S A.When alamouti codes meet interference alignment:transmission schemes for two-user x channel [C]∥IEEE International Symposium on Information Theory(ISIT).2011:2577-2581
[9] Li F,Jafarkhani H.Space-time processing for x channels using precoders [J].IEEE Transactions on Signal Processing,2012,60(4):1849-1861
[10] Ganesan A,Rajan B S.Interference alignment with diversity for the 2×2 X network with three antennas[C]∥ IEEE International Symposium on Information Theory.Honolulu,2014:1216-1220
[11] Zaki A,Wang C,Rasmussen L K.Combining interference alignment and alamouti codes for the 3-user mimo interference channel[C]∥IEEE Wireless Communications and Networking Conference.Shanghai,China,2013:3563-3567

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed