期刊文献+

MIMO系统中基于因素图的迭代信号检测算法 被引量:5

Iterative signal detection algorithm based on factor graph in MIMO systems
下载PDF
导出
摘要 基于无线通信中接收信号的似然检测模型,给出发送信号估计和推理的因素图描述。在此基础上,应用标准和积算法提出一种频率选择性衰落信道下的多输入多输出(multiple input multiple output,MIMO)系统的迭代信号检测算法。为了降低计算复杂度,提出一种快速迭代检测算法,通过引入概率数据关联方法,避免了标准和积算法中符号概率估计的积分计算。仿真结果表明,应用标准和积算法得到的迭代信号检测算法可以逼近最优算法的性能,而快速迭代检测算法在大幅降低计算复杂度的同时,误码率性能比传统的最小均方误差算法有较大优势。 A factor graph description of transmitted signal estimation and inference is presented based on the likelihood detection model of the received signal in wireless communications. The sum-product algorithm is applied to the factor graph for iterative signal detection over the frequency selective channel in MIMO systems. Furthermore, a fast iterative detection algorithm is proposed to reduce the computational complexity, where a probabilistic data association method is introduced to avoid integral computation in the normal sum-product algorithm. Simulation results show that the proposed iterative signal detection algorithm using the normal sumproduct algorithm approximates to optimum performance. The computational complexity of the fast iterative algorithm can be greatly reduced; meanwhile its bit error rate performance is also better than the traditional mini- mum mean square error algorithm.
出处 《系统工程与电子技术》 EI CSCD 北大核心 2009年第7期1534-1538,共5页 Systems Engineering and Electronics
基金 国家自然科学基金资助课题(60672047)
关键词 多输入多输出 信号检测 因素图 和积算法 概率数据关联 multiple input multiple output signal detection factor graph sum-product algorithm probabilistic data association
  • 相关文献

参考文献1

  • 1G.J. Foschini,M.J. Gans. On Limits of Wireless Communications in a Fading Environment when Using Multiple Antennas[J] 1998,Wireless Personal Communications(3):311~335 被引量:1

同被引文献30

  • 1周鹏,赵春明,盛彬.MIMO-OFDM系统中基于导频辅助的信道估计[J].电子与信息学报,2007,29(1):133-137. 被引量:15
  • 2Foschini G J, Gans M J. On limits of wireless communicate on in a fading environment when using multiple antennas [J]. Wireless Personal Communication, 1998, 6(3) : 311 - 335. 被引量:1
  • 3Cimini L J. Analysis and simulation of a digital mobile channel using orthogonal frequency division multiplexing[J]. IEEE Trans. on Communication, 1985, 33 (7) : 665 - 675. 被引量:1
  • 4Xu X, Mathar R. Factor graph based detection and channel estimation for MIMO - OFDM systems in doubly selective channel [J]. IEEE ISWCS, 2010:1 -5. 被引量:1
  • 5Kchischang F R, Frey B J, Loeligor H A. Factor graphs and the sum product algorithm [J]. IEEE Transactions on Information Theory, 2001,47(2) : 498 - 519. 被引量:1
  • 6Y Li, L J Cimini, N R Sollenberger. Robust channel estimation for OFDM systems with rapid dispersive fading channels [ J]. IEEE Transactions on Communications, 1998, 46(7) : 902 -915. 被引量:1
  • 7Knievel C, Shi Z, Hoeher P A. 2D Graph - Basod Soft Channel Estimation for MIMO -OFDM [ J] . IEEE International Conference on Communications, 2010 : 1 - 5. 被引量:1
  • 8Baddour K E, Beauliea N C. Autoregressive models for fading chan- nel simulation E C]. IEEE Global Communications Conference, 2001: 1187- 1192. 被引量:1
  • 9GJ Foschini, MJ Gans. On the limits of wireless communications in a fading environment when using multiple antennas [J]. Wireless Personal Commun, 1998, (6): 315-335. 被引量:1
  • 10F J L R Bahl, J Cocke, J Raviv. Optimal decoding of linear codes for minimizing symbol error rate [J]. IEEE Trans., 1974, 20(2): 284-287. 被引量:1

引证文献5

二级引证文献1

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部