PSK communications systems using fully saturated power amplifiers

Author

Li, Jia ; Liu, Qingchong

Author_Institution

Dept. of Comput. Sci. & Eng., Oakland Univ., Rochester, MI, USA

Volume

42

Issue

2

fYear

2006

fDate

4/1/2006 12:00:00 AM

Firstpage

464

Lastpage

477

Abstract

Quasiconstant envelope phase-shift keying (PSK) is analyzed to assess its ability to overcome nonlinearities caused by fully saturated RF power amplifiers in communications systems. These modulations can achieve bit error rate (BER) performance comparable to linear BPSK in additive white Gaussian noise (AWGN) channel. Quasiconstant envelope offset quadrature PSK (OQPSK) is presented as a design example. At a BER = 10^-5, the SNR degradation caused by fully saturated power amplifiers is 0.1 dB. The simulated BER matches analytically derived results. For a communications system employing the quasiconstant envelope OQPSK and a rate 1/2 convolutional code with K = 7, the demodulation performance is degraded by 0.25 dB at a BER = 10^-5 when a fully saturated power amplifier is employed.

Keywords

AWGN channels; convolutional codes; error statistics; phase shift keying; power amplifiers; quadrature phase shift keying; AWGN channel; BER performance; OQPSK; PSK communications systems; RF power amplifiers; SNR degradation; additive white Gaussian noise channel; bit error rate performance; convolutional code; demodulation performance; fully saturated power amplifier; linear BPSK; nonlinearity overcome; quasiconstant envelope PSK; quasiconstant envelope offset quadrature PSK; quasiconstant envelope phase-shift keying; AWGN; Additive white noise; Binary phase shift keying; Bit error rate; Degradation; Phase shift keying; Power amplifiers; Radio frequency; Radiofrequency amplifiers; Signal to noise ratio;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/TAES.2006.1642564

Filename

1642564