Spectral analysis of polynomial nonlinearity with applications to RF power amplifiers
EURASIP Journal on Applied Signal Processing
MILCOM'09 Proceedings of the 28th IEEE conference on Military communications
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
PAPR reduction of the low complexity phase weighting method in OFDM communication system
IEEE Transactions on Consumer Electronics
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It is a well known fact that Orthogonal Frequency Division Multiplexing (OFDM) suffers from high peak to average power ratio (PAPR). The nonlinear distortion introduced by a high PAPR OFDM signal through practical amplifiers can further degrade the system performance. In this paper, we analyze the performance of a M-ary Quadrature Amplitude Modulation (M-QAM) OFDM system which is subject to distortions from nonlinear high power amplifiers (HPAs) in a Rayleigh fading channel. In order to reduce the nonlinear distortion caused by HPAs, we propose a new companding technique to reduce the PAPR and a novel receiver structure to minimize the degradation effects from the decompander. For the purpose of simulation, we extend the analytical model to be in compliance with the IEEE 802.11n standard. The theoretical results are verified with the simulation.