J4 ›› 2009, Vol. 36 ›› Issue (4): 639-644.

• Original Articles • Previous Articles     Next Articles

Uplink detection algorithms in multiuser MIMO systems

LI Chuan1;LIU Wei2;CHEN Rui2;HUANG Peng-yu2;ZHOU Li-hua1   

  1. (1. Research Inst. of Multimedia Technology, Xidian Univ., Xi'an  710071, China;
    2. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China)
  • Received:2009-03-17 Online:2009-08-20 Published:2009-09-28
  • Contact: LI Chuan E-mail:chuanliuk@yahoo.com

Abstract:

We propose two novel uplink multiuser detection (MUD) algorithms for Multi-User Multiple Input Multiple Output (MU-MIMO) systems. Based on block diagonalization (BD) technique the proposed parallel and successive MUD algorithms can decompose the MU-MIMO system into parallel single user MIMO (SU-MIMO) systems, which enables the SU-MIMO based algorithms to be directly applied and significantly reduces complexity. Simulation results show that the proposed algorithms are capable of achieving the same performance as the corresponding SU-MIMO system and have a substantial performance gain against the traditional zero-forcing (ZF) based algorithm. Furthermore, theoretical analysis and simulation results demonstrate that the successive BD algorithm significantly outperforms the parallel one.

Key words: block diagonalization, parallel multiuser detection, successive mutiuser detection, multi-user MIMO, single-user MIMO, zero-forcing

CLC Number: 

  • TN911.5