A Reliability-Based Detection Algorithm for MIMO Relay System

被引:0
作者
Gao, Rui [1 ]
Zhang, Xin [1 ]
Yang, Dachang [1 ]
Wu, Kai [1 ]
机构
[1] Beijing Univ Posts & Telecommun, Wireless Theories & Technol Lab WT&T, Beijing 100088, Peoples R China
来源
2010 IEEE 71ST VEHICULAR TECHNOLOGY CONFERENCE | 2010年
关键词
MIMO Relay system; Log-Likelihood Ratio(LLR); cooperative diversity; H-ARQ;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Cooperative Communication enables wireless devices with relatively less antennas to share their antennas and create virtual multiple-antenna transmitter, thereby achieving transmit diversity to combat fading caused by multi-path propagation in wireless environment. At the receiver in a multi-input multi-output (MIMO) relay system, we can still utilize the traditional detection algorithm, such as zero-forcing successive interference cancellation (ZF-SIC), which have been widely employed in the Vertical Bell Laboratories Layered Space-Time (V-BLAST) system model. However, the inevitable error-propagation in the procedure of such algorithms may cause great performance degradation, which cannot meet the demand for high data rate while maintaining high quality wireless communications. In this paper, we develop a reliability-based detection algorithm that includes a new log likelihood ratio (LLR) calculation for MIMO Relay system to alleviate error propagation. In addition, to further improve the system performance, we utilize a pair-wise LLR combining scheme suits for cooperative communication system with incremental relaying protocol. Simulation results show that our proposed algorithm outperforms the traditional ones in a MIMO Relay system.
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页数:5
相关论文
共 10 条
  • [1] Benjebbour A, 2001, IEEE VTS VEH TECHNOL, P2053, DOI 10.1109/VTC.2001.957105
  • [2] CODE COMBINING - A MAXIMUM-LIKELIHOOD DECODING APPROACH FOR COMBINING AN ARBITRARY NUMBER OF NOISY PACKETS
    CHASE, D
    [J]. IEEE TRANSACTIONS ON COMMUNICATIONS, 1985, 33 (05) : 385 - 393
  • [3] Choi WJ, 2000, IEEE ICC, P1243, DOI 10.1109/ICC.2000.853698
  • [4] Low complexity bit by bit soft output demodulator
    Fagervik, K
    Jeans, TG
    [J]. ELECTRONICS LETTERS, 1996, 32 (11) : 985 - 987
  • [5] On Limits of Wireless Communications in a Fading Environment when Using Multiple Antennas
    Foschini G.J.
    Gans M.J.
    [J]. Wireless Personal Communications, 1998, 6 (3) : 311 - 335
  • [6] Foschini G. J., 1996, Bell Labs Technical Journal, V1, P41, DOI 10.1002/bltj.2015
  • [7] NICHOLAS J, 2004, IEEE T INFORM THEORY, V50
  • [8] NOSRATINA A, 2004, IEEE COMMUNICATI OCT
  • [9] SANG WK, 2006, IEEE T COMMUN, V54, P302
  • [10] WOLNIANSKY PW, 1998, P ISSSE 98, P395