Multi-slot based spectrum sensing with improved energy detector for cognitive radio network in presence of Rayleigh fading

被引：1
作者：
Bhowmick, Abhijit [1 ]
Roy, Sanjay Dhar [2 ]
Kundu, Sumit [2 ]
机构：
[1] VIT, SENSE, Vellore, Tamil Nadu, India
[2] NIT, ECE Dept, Durgapur, India
来源：
COMPUTERS & ELECTRICAL ENGINEERING | 2016年 / 56卷
关键词：
Cognitive radio; Improved energy detector; Majority; Multi slot sensing;
D O I：
10.1016/j.compeleceng.2016.10.001
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
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. (C) 2016 Elsevier Ltd. All rights reserved.
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收藏
页码：75 / 84
页数：10
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