Performance of OFDM-FFT system in various wireless channels

H. Taha, M. Salleh
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Abstract

The increased in demand for high data rate in wireless communication systems paves the way for the development of broadband communication systems. A radio channel is plagued by multipath propagation, which causes frequency-selective fading in broadband signals. Orthogonal frequency-division multiplexing (OFDM) is a modulation scheme specifically designed to have high-speed data transmission as well as more robust over the frequency-selective fading channels. In this paper we discuss the impact of the number of qudarature amplitude modulation(QAM) modulation point over AWGN, flat fading as well as frequency selective fading channels.
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OFDM-FFT系统在各种无线信道中的性能
无线通信系统对高数据速率需求的增加为宽带通信系统的发展铺平了道路。无线电信道受到多径传播的困扰,这会导致宽带信号的频率选择性衰落。正交频分复用(OFDM)是一种专为高速数据传输而设计的调制方案,并且在频率选择性衰落信道上具有更强的鲁棒性。本文讨论了正交调幅(QAM)调制点个数对AWGN、平坦衰落和频率选择性衰落信道的影响。
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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