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空时分组码系统中WL-Kalman均衡算法


  摘 要: 根据空时分组码(STBC)系统的编码特点,提出了一种低复杂度的基于宽线性(WL)处理的Kalman均衡算法。该算法针对STBC系统,利用宽线性处理的思想,采用Kalman均衡算法对接收信号及其复共轭联合进行处理,有效地减轻了由频率选择性衰落信道引起的码间干扰(ISI)。对所提出的均衡算法在不同环境下进行了仿真验证。结果表明,与传统的线性均衡器相比,该算法明显提高了系统的性能,具有实际应用价值。

  关键词:空时分组码; 卡尔曼滤波; 宽线性处理; 码间干扰

  中图分类号:TN911.5文献标志码:A

  文章编号:1001-3695(2010)07-2674-03

  doi:10.3969/j.issn.1001-3695.2010.07.078

  WL-Kalman equalization algorithm for STBC systems

  HAO Li-honga, LI Guang-juna, XIONG Xing-zhongb

  (a. School of Communication & Information Engineering, b.National Key Laboratory of Communications, University of Electronic Science & Technology of China, Chengdu 610054, China)

  Abstract:This paper proposed a low complexity Kalman equalization algorithm based on widely linear (WL) process by utilizing the property of the space time block code (STBC) systems. The proposed equalization algorithm significantly alleviated the effect of inter-symbol interference (ISI) caused by frequency selective fading channel by using WL-Kalman equalizer, which jointly processed the received sequence and its complex conjugate. Gave the simulation results in different scenarios. The resuts show that the proposed WL-Kalman equalization algorithm gets better performance than the conventional linear equalizer.

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