OFDM-CDMA systems with nonlinear power amplifier

Author

Li, Junsong ; Kavehrad, Mohsen

Author_Institution

CICTR, Pennsylvania State Univ., University Park, PA, USA

fYear

1999

fDate

1999

Firstpage

1167

Abstract

This investigation has been motivated by a recent increased interest in orthogonal frequency division multiplexing (OFDM) CDMA systems for broadband wireless services. One of the major problems in OFDM systems is nonlinear distortion caused by high-power amplifiers. In this paper, the effect of non-perfect power amplification on OFDM-CDMA systems is examined. Simulation results show that, with an ideally linearized amplifier, the performance of OFDM-CDMA systems can be improved over an AWGN channel. In general, OFDM-CDMA systems perform better than OFDM systems with non-ideal power amplification, by using a simple code word assignment scheme

Keywords

AWGN channels; OFDM modulation; code division multiple access; digital radio; nonlinear distortion; power amplifiers; AWGN channel; OFDM-CDMA systems; broadband wireless services; code word assignment scheme; high-power amplifiers; nonlinear distortion; nonlinear power amplifier; nonperfect power amplification; orthogonal frequency division multiplexing; simulation results; AWGN channels; Broadband amplifiers; Fading; Frequency division multiaccess; High power amplifiers; Multiaccess communication; Nonlinear distortion; OFDM; Power amplifiers; Power generation;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE

Conference_Location

New Orleans, LA

ISSN

1525-3511

Print_ISBN

0-7803-5668-3

Type

conf

DOI

10.1109/WCNC.1999.796903

Filename

796903