Title :
OFDM-CDMA systems with nonlinear power amplifier
Author :
Li, Junsong ; Kavehrad, Mohsen
Author_Institution :
CICTR, Pennsylvania State Univ., University Park, PA, USA
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;
Conference_Titel :
Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5668-3
DOI :
10.1109/WCNC.1999.796903
