›› 2013, Vol. 28 ›› Issue (3): 445-453.doi: 10.1007/s11390-013-1346-0

• Special Section on Recent Advances in Mobile Computing and Networking • Previous Articles     Next Articles

Simplified MMSE Detectors for Turbo Receiver in BICM MIMO Systems

Juan Han1,2 (韩娟), Chao Tang3,4 (唐超), Qiu-Ju Wang1,2 (王秋菊), Zi-Yuan Zhu1,2 (朱子元), and Shan Tang1,2 (唐杉)   

  1. 1. Beijing Key Laboratory of Mobile Computing and Pervasive Device, Institute of Computing Technology Chinese Academy of Sciences, Beijing 100190, China;
    2. Beijing Sylincom Technologies Co., Ltd., Beijing 100190, China;
    3. School of Instrumentation Science and Opto-Electronics Engineering, Beihang University, Beijing 100191, China;
    4. Beijing Science and Technology Information Center, Beijing 100035, China
  • Received:2012-10-05 Revised:2013-03-01 Online:2013-05-05 Published:2013-05-05
  • Contact: 10.1007/s11390-013-1346-0
  • Supported by:

    This work was supported by the Major Project of the Beijing Natural Science Foundation under Grant No. 4110001 and the National Science and Technology Major Project of China under Grant No. 2012ZX03001021-003.

In this article, two methods adopting simplified minimum mean square error (MMSE) filter with soft parallel interference cancellation (SPIC) are discussed for turbo receivers in bit interleaved coded modulation (BICM) multiple-input multiple-output (MIMO) systems. The proposed methods are utilized in the non-first iterative process of turbo receiver to suppress residual interference and noise. By modeling the components of residual interference after SPIC plus the noise as uncorrelated Gaussian random variables, the matrix inverse for weighting vector of conventional MMSE becomes unnecessary. Thus the complexity can be greatly reduced with only slight performance deterioration. By introducing optimal ordering to SPIC, performance gap between simplified MMSE and conventional MMSE further narrows. Monte Carlo simulation results confirm that the proposed algorithms can achieve almost the same performance as the conventional MMSE SPIC in various MIMO configurations, but with much lower computational complexity.

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