Title :
Optimal beamforming in MIMO systems with HPA nonlinearity
Author :
Qi, Jian ; Aïssa, Sonia
Author_Institution :
INRS-EMT, Univ. of Quebec, Montreal, QC, Canada
Abstract :
In this paper, multiple-input multiple-output (MIMO) transmit beamforming (TB) systems under the consideration of nonlinear high-power amplifiers (HPAs) are investigated. The optimal beamforming scheme, with the optimal beamforming weight vector and combining vector, is proposed for MIMO systems with HPA nonlinearity. The performance of the proposed MIMO beamforming scheme in the presence of HPA nonlinearity is evaluated in terms of average symbol error probability (SEP), outage probability and system capacity, considering transmission over uncorrelated quasi-static frequency-flat Rayleigh fading channels. Numerical results are provided and show the effects of several system parameters, namely, parameters of nonlinear HPA, numbers of transmit and receive antennas, and modulation order of phase-shift keying (PSK), on performance.
Keywords :
MIMO communication; Rayleigh channels; array signal processing; error statistics; phase shift keying; receiving antennas; transmitting antennas; MIMO beamforming scheme; multiple input multiple output transmit beamforming system; nonlinear HPA nonlinearity; nonlinear high power amplifier; optimal beamforming weight vector; outage probability; phase shift keying; receive antennas; symbol error probability; transmit antennas; uncorrelated quasistatic frequency flat Rayleigh fading channel; Array signal processing; Fading; MIMO; Receiving antennas; Signal to noise ratio; Upper bound;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2010 IEEE 21st International Symposium on
Conference_Location :
Instanbul
Print_ISBN :
978-1-4244-8017-3
DOI :
10.1109/PIMRC.2010.5672083
