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Performance of OFDM-FFT system in various wireless channels
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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