Cooperative spectrum sensing in decentralized cognitive radio system

Armi, N. and Yusoff, M.Z. and Saad, N.M. (2013) Cooperative spectrum sensing in decentralized cognitive radio system. In: UNSPECIFIED.

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Abstract

Cooperative spectrum sensing (CSS) is capable to improve the performance of signal detection. It is one solution to overcome fading, shadowing, and uncertainty noises. Unlike centralized networks, Secondary User (SU) in decentralized networks independently senses license channel without forwarding the sensing result to central coordinator. This paper investigates the performance of Decentralized Multiuser CSS (DMCSS) in Cognitive Radio (CS) system. Partially observable Markov decision process (POMDP) is used as an aid for SU to sense and access a license channel. It models spectrum as Markov discrete process where idle and busy states are represented by '0' and '1'. The comparisons are made against Centralized Multiuser Cooperative Spectrum Sensing (CMCSS). The derived results show that CMCSS has better performance than DMCSS model. However, at certain values of SNR, DMCSS performance outperforms the achievable throughput by CMCSS through setting of collision threshold (ζ). © 2013 IEEE.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Additional Information: cited By 5; Conference of IEEE EuroCon 2013 ; Conference Date: 1 July 2013 Through 4 July 2013; Conference Code:101060
Uncontrolled Keywords: Achievable throughputs; Better performance; Centralized networks; Co-operative spectrum sensing; Decentralized networks; Dynamic spectrum accesses (DSA); Opportunistic spectrum accesses (OSA); Partially observable Markov decision process, Cognitive radio; Signal to noise ratio, Radio systems
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 09 Nov 2023 15:51
Last Modified: 09 Nov 2023 15:51
URI: https://khub.utp.edu.my/scholars/id/eprint/3257

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