Please use this identifier to cite or link to this item: http://hdl.handle.net/11144/3065
Title: Optimum and Sub-Optimum Receivers for OFDM Signals with Strong Nonlinear Distortion Effects
Authors: Guerreiro, Joao
Dinis, Rui
Montezuma, Paulo
Keywords: signal detection
nonlinear distortion
OFDM modulation
radio receivers
Issue Date: Sep-2013
Publisher: IEEE
Abstract: In this paper we consider the optimum detection of OFDM (Orthogonal Frequency Division Multiplexing) signals with strong nonlinear distortion effects. It is shown that the optimum performance with strong nonlinear distortion effects is not as bad as one might expect and can even be better than the performance with conventional, linear transmitters. To achieve these excellent performances we should employ receivers able to take advantage of the information associated to transmitted data symbols that is inherent to the nonlinear distortion component, in opposition to traditional OFDM implementations where nonlinear distortion effects are regarded as an undesirable noise-like component. We study the achievable gains of the optimum receiver both analytically and by simulation. Since the complexity of optimum receivers is extremely high when we have nonlinear distortion effects, even for OFDM signals with a small number of subcarriers, we propose several sub-optimum receivers and evaluate their performance. Our sub-optimal receivers allow remarkable performance improvements, being able to reduce significantly the gap between the optimum performance and the performance of typical OFDM receivers.
Peer reviewed: yes
URI: http://hdl.handle.net/11144/3065
metadata.dc.identifier.doi: 10.1109/TCOMM.2013.072913.120344
ISSN: 0090-6778
Publisher version: http://ieeexplore.ieee.org/document/6573233/
Appears in Collections:DCT - Artigos/Papers

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