Partial Selective Mapping OFDM with Low Complexity IFFTs

Selective mapping (SLM) is a distortionless technique for reducing the peak-to-average power ratio (PAPR) of an orthogonal frequency division multiplexing (OFDM) signal. However, it has a relatively high computational complexity due to the computation of multiple inverse fast Fourier transforms (IFF...

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Bibliographic Details
Published in:IEEE communications letters 2008-01, Vol.12 (1), p.4-6
Main Authors: Ghassemi, A., Gulliver, T.A.
Format: Article
Language:English
Subjects:
Applied sciences
Complexity
Computation
Computational complexity
Discrete Fourier transforms
Distortion
Exact sciences and technology
Fast Fourier transforms
Fourier transforms
Frequency division multiplexing
Information, signal and communications theory
Inverse
Mapping
Multiplexing
OFDM
Orthogonal Frequency Division Multiplexing
Peak to average power ratio
Reduction
Signal and communications theory
Signal mapping
Telecommunications and information theory
Time domain analysis
Wireless communication
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Description
Summary:Selective mapping (SLM) is a distortionless technique for reducing the peak-to-average power ratio (PAPR) of an orthogonal frequency division multiplexing (OFDM) signal. However, it has a relatively high computational complexity due to the computation of multiple inverse fast Fourier transforms (IFFTs). In this letter, we present a new technique for reducing this complexity which is based on multiplying the phase sequences with a subset of the intermediate IFFT signals. This new technique significantly decreases the computational complexity while providing comparable PAPR reduction to original SLM (O-SLM).
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2008.071397