A simplified clipping and filtering technique for PAR reduction in OFDM systems

The existing iterative clipping and filtering techniques require several iterations to mitigate the peak regrowth. In this letter, we analyze the conventional clipping and filtering using a parabolic approximation of the clipping pulse. We show that the clipping noise obtained after several clipping...

Full description

Saved in:
Bibliographic Details
Published in:IEEE signal processing letters 2005-06, Vol.12 (6), p.453-456
Main Authors: Luqing Wang, Tellambura, C.
Format: Article
Language:English
Subjects:
Clipping and filtering
Computational complexity
Convergence
Fast Fourier transforms
Filtering
Frequency conversion
Noise generators
Noise reduction
OFDM
orthogonal frequency division multiplexing (OFDM)
Peak to average power ratio
peak-to-average power ratio (PAR) reduction
scaling
Time domain analysis
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The existing iterative clipping and filtering techniques require several iterations to mitigate the peak regrowth. In this letter, we analyze the conventional clipping and filtering using a parabolic approximation of the clipping pulse. We show that the clipping noise obtained after several clipping and filtering iterations is approximately proportional to that generated in the first iteration. Therefore, we scale the clipping noise generated in the first iteration to get a new clipping and filtering technique that, with three fast Fourier transform/inverse fast Fourier transform (FFT/IFFT) operations, obtains the same PAR reduction as that of the existing iterative techniques with 2K+1 FFT/IFFT operations, where K represents the number of iterations.
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2005.847886