非线性功率放大器OFDM-CDMA系统

WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466) Pub Date : 1999-09-21 DOI:10.1109/WCNC.1999.796903

Junsong Li, M. Kavehrad

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引用次数: 12

摘要

这项研究的动机是最近对宽带无线服务的正交频分复用(OFDM) CDMA系统的兴趣增加。大功率放大器引起的非线性失真是OFDM系统的主要问题之一。本文研究了非完美功率放大对OFDM-CDMA系统的影响。仿真结果表明，采用理想的线性化放大器，可以在AWGN信道上提高OFDM-CDMA系统的性能。一般来说，OFDM- cdma系统通过使用简单的码字分配方案，性能优于非理想功率放大的OFDM系统。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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OFDM-CDMA systems with nonlinear power amplifier

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.

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WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466)

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