DocumentCode
1256469
Title
Low-Complexity Spectrum Shaping for OFDM-Based Cognitive Radio Systems
Author
Zhou, Xiangwei ; Li, Geoffrey Ye ; Sun, Guolin
Author_Institution
School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA
Volume
19
Issue
10
fYear
2012
Firstpage
667
Lastpage
670
Abstract
Orthogonal frequency-division multiplexing (OFDM) is an ideal transmission technique for dynamic spectrum access in cognitive radio (CR) systems. In this letter, we propose low-complexity spectrum shaping to enable fast decaying of power spectral sidelobes and enhance spectral compactness for OFDM-based CR systems. Based on a basic scheme mapping antipodal symbol pairs onto adjacent subcarriers, we present two modified schemes to further balance sidelobe suppression and system throughput. Compared with existing spectrum shaping schemes, ours exhibit their advantage of both simplicity and flexibility.
Keywords
Cognitive radio; Interference; OFDM; Throughput; Cognitive radio; OFDM; precoding; spectrum shaping;
fLanguage
English
Journal_Title
Signal Processing Letters, IEEE
Publisher
ieee
ISSN
1070-9908
Type
jour
DOI
10.1109/LSP.2012.2211013
Filename
6256699
Link To Document