Research Article
A Bit-Loading Scheme for V-BLAST Systems with Improved BER Performance
@INPROCEEDINGS{10.1109/CHINACOM.2007.4469595, author={Xiaolin Che and Chen He}, title={A Bit-Loading Scheme for V-BLAST Systems with Improved BER Performance}, proceedings={2nd International ICST Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2008}, month={3}, keywords={MIMO V-BLAST adaptive modulation bit loading spatial multiplexing}, doi={10.1109/CHINACOM.2007.4469595} }- Xiaolin Che
Chen He
Year: 2008
A Bit-Loading Scheme for V-BLAST Systems with Improved BER Performance
CHINACOM
IEEE
DOI: 10.1109/CHINACOM.2007.4469595
Abstract
In this paper, a bit-loading scheme is proposed for multiple-input-multiple-output (MIMO) spatial multiplexing systems. Minimization of average bit error rate (BER) criteria is employed under the requirement of total bit rates and equal power allocation to each transmit antenna. Bisection method is utilized to select transmit constellations that make the BER of every transmit substream equal. In contrast to the transmit power allocation scheme, the requirements on the dynamic range of the power amplifiers are reduced in our scheme without the performance loss. Simulation results have shown that the proposed scheme could provide superior performance over the conventional MIMO system.
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