Multi-slot based spectrum sensing with improved energy detector for cognitive radio network in presence of Rayleigh fading. (November 2016)

• Record Type: Journal Article
• Authors: Bhowmick, Abhijit; Roy, Sanjay Dhar; Kundu, Sumit
• Is Part Of: Computers & electrical engineering. Volume 56(2016)
• Page Start: 75
• Page End: 84
• Publication Date: 2016-11
• Subjects: Cognitive radio -- Improved energy detector -- Majority -- Multi slot sensing; Computer engineering -- Periodicals; Electrical engineering -- Periodicals; Electrical engineering -- Data processing -- Periodicals; Ordinateurs -- Conception et construction -- Périodiques; Électrotechnique -- Périodiques; Électrotechnique -- Informatique -- Périodiques; Computer engineering; Electrical engineering; Electrical engineering -- Data processing; Periodicals; Electronic journals; 621.302854
• DOI: 10.1016/j.compeleceng.2016.10.001
• Languages: English
• ISSNs: 0045-7906

Abstract

Abstract: In this paper, the performance of multi-slot based spectrum sensing is investigated in a cooperative scenario where each cognitive radio (CR) user is equipped with an improved energy detector (IED). Two levels of fusion are employed: (i) sub-local decisions obtained in multiple mini slots are combined using OR logic fusion at a CR to obtain a local decision (ii) local decisions from CRs are combined using Majority logic fusion at FC to obtain final decision about the presence of PU. Both the sensing channel (S-channel) and reporting channel (R-channel) are assumed to be Rayleigh faded. Each CR sends its local decision over R-channel to FC after BPSK modulation. The performance of the cooperative spectrum sensing (CSS) using multi-slot and IED is assessed in terms of detection probability and false alarm probability. Furthermore, throughput of a CR is also evaluated under the proposed spectrum sensing scheme. Novel analytical expressions for the detection performance are developed. Performance of multi-slot based sensing is also compared with spectrum sensing without slotted sensing time. Impact of several sensing parameters such as sensing threshold, number of mini-slot, sensing channel SNR (SSNR), reporting channel SNR (RSNR) and IED parameters ( p ) on the detection performance of CR is indicated. The impact of multi-slot and IED parameter on throughput is also investigated.