Title :
A Bit-Loading Scheme for V-BLAST Systems with Improved BER Performance
Author :
Che, Xiaolin ; He, Chen
Author_Institution :
Shanghai Jiaotong Univ., Shanghai
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.
Keywords :
MIMO communication; error statistics; power amplifiers; transmitting antennas; BER performance; V-BLAST systems; average bit error rate criteria; bisection method; bit-loading scheme; equal power allocation; multiple-input-multiple-output systems; power amplifiers; spatial multiplexing systems; transmit antenna; transmit power allocation scheme; Bit error rate; Bit rate; Dynamic range; MIMO; Power amplifiers; Receiving antennas; Signal to noise ratio; Transmitters; Transmitting antennas; Wireless communication; MIMO; V-BLAST; adaptive modulation; bit loading; spatial multiplexing;
Conference_Titel :
Communications and Networking in China, 2007. CHINACOM '07. Second International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1009-5
Electronic_ISBN :
978-1-4244-1009-5
DOI :
10.1109/CHINACOM.2007.4469595
