DocumentCode :
3542551
Title :
The Population Declining AFSA Based Identification of Active Users for Cooperative Cognitive Radio Networks with DS-UWB Based Control Channel
Author :
Zhiyuan Zong ; Zhendong Yin ; Zhilu Wu
Author_Institution :
Sch. of Electron. & Inf. Eng., Harbin Inst. of Technol., Harbin, China
fYear :
2012
fDate :
21-23 Sept. 2012
Firstpage :
1
Lastpage :
5
Abstract :
Cognitive radio (CR) has been considered as a promising technology to alleviate the spectrum scarcity problem and the spatial diversity gain can be obtained through cooperation among multiple secondary users (SUs). However, the multiuser control channel for exchanging control information among them becomes saturated, due to a significant number of cooperating SUs existing in this cooperative cognitive radio network (CRN). In this paper, the DS-UWB based control channel is applied to this scenario for its underlay nature and multiuser capability. In this multiuser DS-UWB framework, the active user identification problem is studied here for both the efficiency of multiuser detection (MUD) and the identification of malicious or redundant SUs. Then a novel population declining artificial fish swarm algorithm (PD-AFSA) based user identification scheme is proposed to make the logarithmic maximum a posterior (MAP) estimation of active SUs. This scheme employs a population declining mechanism to enlarge the searching range through initializing the large population of artificial fishes (AFs), and declining their population in successive iterations. Experimental results have testified the validity of this proposed PD-AFSA based scheme in both static and dynamic situations.
Keywords :
cognitive radio; cooperative communication; multiuser channels; ultra wideband communication; DS UWB based control channel; active user identification problem; cooperative cognitive radio networks; logarithmic maximum a posterior estimation; multiple secondary user; multiuser DS UWB framework; multiuser capability; multiuser control channel; multiuser detection; population declining AFSA based identification; population declining artificial fish swarm algorithm; spatial diversity gain; spectrum scarcity problem; user identification scheme; Cognitive radio; Estimation; Marine animals; Sensors; Sociology; Statistics; Vectors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications, Networking and Mobile Computing (WiCOM), 2012 8th International Conference on
Conference_Location :
Shanghai
ISSN :
2161-9646
Print_ISBN :
978-1-61284-684-2
Type :
conf
DOI :
10.1109/WiCOM.2012.6478715
Filename :
6478715
Link To Document :
بازگشت