Paper Info
Title
Performance of an Improved Energy Detector in Multi-Hop Cognitive Radio Networks
Abstract
Cooperative spectrum sensing in a multi-hop cognitive radio (CR) network based on multiple antennas using an improved energy detector is studied in this paper. The improved energy detector uses p-th power of absolute value of samples of primary user’s (PU’s) signals. We replace the conventional energy detector by an improved energy detector for enhancing the performance of CR. Analytical expressions of the probability of false alarm and missed detection in each CR are derived. Further, we extend our study to a multi-hop cooperative diversity system containing multiple multi-hop secondary transmission paths between PU and fusion center. Performance analysis of multi-hop cooperative diversity is discussed using an improved energy detector. We introduce a framework to derive a closedform expression of optimal number of multi-hop cooperative diversity branches by minimizing the total error rate. An efficient quick spectrum sensing algorithm is proposed which requires fewer than the total number of cooperative multi-hop diversity branches. It is shown through various numerical examples that by using the optimal number of secondary transmission paths, it is possible to perform quick spectrum sensing while satisfying an upper bound on the total error rate.
Year
DOI
Venue
2016
10.1109/TVT.2015.2401332
Vehicular Technology, IEEE Transactions  
Keywords
DocType
Volume
Cognitive radio,improved energy detector,multi-hop communication
Journal
PP
Issue
ISSN
Citations 
99
0018-9545
15
PageRank 
References 
Authors
0.67
23
3
Name
Order
Citations
PageRank
Ajay Singh1443.02
Manav R. Bhatnagar253953.01
Ranjan K. Mallik3111496.29