J4 ›› 2009, Vol. 36 ›› Issue (3): 563-572.

• Original Articles • Previous Articles     Next Articles

Design and performance analysis of quasi-orthogonal space-time block codes for four antennas

XIE Wu1;CAO Jia-nian1;WANG Li-ying2
  

  1. (1. School of Infor. and Comm. Eng., Harbin Eng. Univ., Harbin  150001, China;
    2. The 54th Research Institute of CETC, Shijiazhuang  050081,  China)
  • Received:2008-03-28 Revised:2008-06-26 Online:2009-06-20 Published:2009-07-04
  • Contact: XIE Wu E-mail:xiewu@hrbeu.edu.cn

Abstract:

This paper analyzes the structure and characteristics of several types of quasi-orthogonal space-time block codes (QSTBC). It proposes two new methods for QSTBC for four antennas which enrich the family of QSTBC. Experimental results indicate that the two new QSTBC have good performance as in TBH and Jafarkhani cases, while the decoding complexity is the same as that of other QSTBC. This paper has compared the Maximum Likelihood (ML) decoding algorithm and QR decomposition decoding algorithm for the new QSTBC. Simulation results indicate that the QR decoding algorithm has good performance and can reduce the computation complexity.

Key words: MIMO systems, QSTBC, Maximum Likelihood decoding, Matrix QR decomposition

CLC Number: 

  • TN911.22