Title :
A Novel Nyquist Window for OFDM-based Cognitive Radio Systems
Author :
Yang, Ziyuan ; Zhang, Haixia ; Yuan, Dongfeng ; Bai, Zhiquan ; Kwak, Kyungsup
Author_Institution :
Sch. of Inf. of Sci. & Eng., Shandong Univ. Jinan, Jinan
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.
Keywords :
OFDM modulation; cognitive radio; resource allocation; FCC; Nyquist Window; OFDM; adjacent non-orthogonal users; cognitive radio systems; mathematical model; orthogonal frequency division multiplexing; primary users; secondary users; spectrum resources allocation; spectrum utilization; Chromium; Cognitive radio; FCC; Frequency measurement; Interference; Mathematical model; OFDM modulation; Performance analysis; Physical layer; Resource management;
Conference_Titel :
Cognitive Radio Oriented Wireless Networks and Communications, 2008. CrownCom 2008. 3rd International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2301-9
Electronic_ISBN :
978-1-4244-2302-6
DOI :
10.1109/CROWNCOM.2008.4562495
