Title :
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
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;
Conference_Titel :
Communications, Circuits and Systems, 2005. Proceedings. 2005 International Conference on
Print_ISBN :
0-7803-9015-6
DOI :
10.1109/ICCCAS.2005.1493450
