Title :
A new algorithm for sidelobe suppression and performance comparison in DFT-OFDM cognitive radios
Author :
Marey, Mohamed ; Dobre, Octavia ; Willink, Tricia
Author_Institution :
Fac. of Eng. & Appl. Sci., Memorial Univ. of Newfoundland, St. John´´s, NL, Canada
Abstract :
In this paper, we propose a novel algorithm to reduce the out-of-band radiation for the Discrete Fourier Transform (DFT)-based orthogonal frequency division multiplexing (OFDM) cognitive radio (CR) systems. Further, we provide a performance comparison for the proposed and conventional algorithms in terms of power spectral density (PSD), peak to average power ratio (PAPR), and required bandwidth for overhead. Simulation results demonstrate that the proposed algorithm outperforms the conventional algorithms at the cost of an overhead, with a similar PAPR. The trade-off between the PSD (as a benefit) and the PAPR and overhead (as costs) is emphasized, being used for the selection of specific algorithm parameters.
Keywords :
OFDM modulation; cognitive radio; discrete Fourier transforms; DFT-OFDM cognitive radios; discrete Fourier transform; orthogonal frequency division multiplexing cognitive radio systems; peak to average power ratio; performance comparison; power spectral density; sidelobe suppression; Cognitive radio; Gain; Indexes; Interference; Peak to average power ratio; Signal processing algorithms; Cognitive Radio; OFDM; Sidelobe Suppression;
Conference_Titel :
Signals, Systems and Computers (ASILOMAR), 2010 Conference Record of the Forty Fourth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
978-1-4244-9722-5
DOI :
10.1109/ACSSC.2010.5757597