Acta Metallurgica Sinica(English letters) ›› 2008, Vol. 15 ›› Issue (2): 7-11.doi: 1005-8885 (2008) 02-0007-05

• Wireless • Previous Articles     Next Articles

Multistage soft decision equalization technique for MIMO systems in frequency selective channels

YU Jiang, LI Xiao-jun, YUE Guang-xin   

  1. Digital Communications and Networking Laboratory, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2007-10-15 Revised:1900-01-01 Online:2008-06-30
  • Contact: YU Jiang, LI Xiao-jun, YUE Guang-xin

Abstract:

This article proposes a multistage soft decision equalization (SDE) technique for block transmission over frequency selective multi-input multi-output (MIMO) channels. Using the Toeplitz structure, the general signal model can be converted into a series of small-sized sub-signal models. For each sub-signal model, soft interference cancellation (SIC) is used firstly to remove partial effects of interfering symbols, then max-log-MAP sphere decoder is performed to get the desired a posteriori information. Simulation shows that with lower complexity the proposed method outperforms the probability data association SDE and the Schnorr-Euchner sphere decoder.

Key words:

sphere decoder;SDE

CLC Number: