Power amplifier nonlinearity effects on OFDM subcarrier transmit beamforming

Author

Ku, Gwanmo ; Walsh, John MacLaren

Author_Institution

Dept. of Electr. & Comput. Eng., Drexel Univ., Philadelphia, PA, USA

fYear

2011

fDate

28-31 March 2011

Firstpage

1954

Lastpage

1959

Abstract

The effect of a power amplifier nonlinearity on multi-antenna orthogonal frequency division multiplexing (OFDM) transmitters utilizing subcarrier beamforming is investigated. Theoretical analysis and simulation shows that such systems can exhibit significant performance degradation due to the power amplifier nonlinearity when there are channel state feedback errors. The SINR degradation under solely channel mismatch is shown to be significantly better than when power amplifier nonlinearity effects are included. The ultimate conclusion is that power amplifier nonlinearity effects should be considered when designing per subcarrier transmit beamformers.

Keywords

OFDM modulation; antenna arrays; array signal processing; power amplifiers; OFDM subcarrier transmit beamforming; SINR degradation; channel state feedback errors; multiantenna orthogonal frequency division multiplexing transmitters; power amplifier nonlinearity effects; theoretical analysis; Array signal processing; Degradation; Interference; OFDM; Receivers; Signal to noise ratio; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference (WCNC), 2011 IEEE

Conference_Location

Cancun, Quintana Roo

ISSN

1525-3511

Print_ISBN

978-1-61284-255-4

Type

conf

DOI

10.1109/WCNC.2011.5779458

Filename

5779458