Research Article
A Novel Nyquist Window for OFDM-based Cognitive Radio Systems
@INPROCEEDINGS{10.1109/CROWNCOM.2008.4562495, author={Ziyuan Yang and Haixia Zhang and Dongfeng Yuan and Zhiquan Bai and Kyung Sup Kwak and Kyungsup Kwak}, title={A Novel Nyquist Window for OFDM-based Cognitive Radio Systems}, proceedings={3rd International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2008}, month={7}, keywords={}, doi={10.1109/CROWNCOM.2008.4562495} }- Ziyuan Yang
Haixia Zhang
Dongfeng Yuan
Zhiquan Bai
Kyung Sup Kwak
Kyungsup Kwak
Year: 2008
A Novel Nyquist Window for OFDM-based Cognitive Radio Systems
CROWNCOM
IEEE
DOI: 10.1109/CROWNCOM.2008.4562495
Abstract
Cognitive radio (CR) is one of the important paradigms proposed by FCC for improving the spectrum utilization. To make agile spectrum resources allocation between the primary users (PUs) and the secondary users (SUs), Orthogonal Frequency Division Multiplexing (OFDM) has been taken as one of the potential modulation candidates in the physical layer in CR. This paper presents a mathematical model for measuring the interference in the windowed OFDM systems. Additionally, we introduce a novel optimized Nyquist window approach to decrease the out-of-band radiation, such that the interference to the adjacent non-orthogonal users can be avoided. Both theoretical analysis and numerical results show the performance enhancement of the proposed scheme.
