Exact BER analysis for M-QAM modulation with transmit beamforming under channel prediction errors

Author

Martos-Naya, Eduardo ; Paris, José F. ; Fernández-Plazaola, Unai ; Goldsmith, Andrea J.

Author_Institution

Dept. de Ingeniera de Comun., Univ. de Malaga, Malaga, Spain

Volume

7

Issue

10

fYear

2008

fDate

10/1/2008 12:00:00 AM

Firstpage

3674

Lastpage

3678

Abstract

Significant throughput improvements can be obtained in multiple-input multiple-output (MIMO) fading channels by merging beamforming at the transmitter and maximal ratio combining (MRC) at the receiver. In general, accurate channel state information (CSI) is required to achieve these performance gains. In this paper, we analyze the impact of channel prediction error on the bit error rate (BER) of combined beamforming and MRC in slow Rayleigh fading channels. Exact closed-form BER expressions are obtained in terms of elementary functions. Numerical results show that imperfect CSI causes little BER degradation using channel prediction of moderate complexity.

Keywords

MIMO communication; Rayleigh channels; computational complexity; error statistics; numerical analysis; quadrature amplitude modulation; M-QAM modulation; MIMO systems; Rayleigh fading channels; bit error rate; channel prediction errors; channel state information; exact BER analysis; maximal ratio combining; multiple-input multiple-output channels; transmit beamforming; Array signal processing; Bit error rate; Channel state information; Diversity reception; Fading; MIMO; Merging; Optical modulation; Throughput; Transmitters; Multiple input multiple output (MIMO) systems, beamforming, maximal ratio combining (MRC), imperfect channel state information (ICSI), channel prediction, bit error rate (BER);

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/T-WC.2008.070192

Filename

4657309