MMSE iterative soft interference cancellation algorithm using transmit power allocation scheme in V-BLAST system

Author

WanBin, Tang ; YanLin, Zhou ; Shaoqian, Li

Author_Institution

Nat. Key Lab. of Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

1

fYear

2005

Firstpage

462

Abstract

In the V-BLAST system, the minimum mean square error (MMSE) iterative soft interference canceller is a popular soft-input/soft-output (SISO) detector for the turbo receiver. Link adaptation is a good scheme to improve performance in a wireless system. In the paper, we propose a modified algorithm of MMSE iterative soft interference cancellation detector with variable transmission power in each antenna, and propose an effective transmit power scheme to improve bit error rate (BER) performance. This scheme requires small feedback overhead. By uncoded system simulation, it is found that the modified V-BLAST system with transmit power allocation outperforms the conventional V-BLAST system greatly.

Keywords

error statistics; feedback; interference suppression; iterative methods; least mean squares methods; power control; radio receivers; BER performance; MMSE; SISO detector; V-BLAST system; bit error rate; feedback overhead; iterative soft interference cancellation; link adaptation; minimum mean square error; soft-input/soft-output detector; transmit power allocation; turbo receiver; uncoded system simulation; variable transmission power; Bit error rate; Detection algorithms; Detectors; Interference cancellation; Interference elimination; Iterative algorithms; MIMO; Mean square error methods; Space technology; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems, 2005. Proceedings. 2005 International Conference on

Print_ISBN

0-7803-9015-6

Type

conf

DOI

10.1109/ICCCAS.2005.1493450

Filename

1493450