M-QAM-OFDM system performance in the presence of a nonlinear amplifier and phase noise
M-QAM-OFDM system performance in the presence of a nonlinear amplifier and phase noise
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DOI：
10.1109/26.990908
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发表时间：
2002-03-01
影响因子：
8.3
通讯作者：
Pupolin, S
中科院分区：
文献类型：
--
作者：
Costa, E;Pupolin, S
正交频分复用（OFDM）调制格式已在欧洲被提议作为广播音频和电视数字信号以及宽带无线通信系统（例如，HIPERLAN II）的标准。发射端大功率放大器的非线性和振荡器的相位噪声严重影响OFDM方案的性能。本文研究了放大器非线性和相位噪声对OFDM信号的联合效应。提供了对信号失真的每个贡献的准确统计描述。理论结果与仿真结果吻合较好，可用于推导OFDM系统的性能，而无需进行大量的仿真。
The orthogonal frequency-division multiplexing (OFDM) modulation format has been proposed in Europe as the standard for broadcasting both audio and television digital signals and for wide-band wireless communication systems (e.g., HIPERLAN II). The performance of the OFDM scheme is severely affected by the nonlinearity of the high-power amplifier at the transmitter end and by the phase noise of the oscillators. In this paper, we investigate the joint effects induced on the OFDM signal by the amplifier nonlinearity and by the phase noise. An accurate statistical description of each contribution to the signal distortion is provided. Theoretical results show perfect agreement with those obtained by simulation and they can be used to derive the OFDM system performance, without the need to run extensive simulations.