Open AccessBit error rate and outage analysis of an interference cancellation technique for cooperative spectrum sharing cognitive radio systems
Author(s) -
Jain Neha,
Vashistha Ankush,
Bohara Vivek Ashok
Publication year - 2016
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2015.0172
Subject(s) - cognitive radio , computer science , overlay , coding gain , interference (communication) , diversity gain , bit error rate , coding (social sciences) , outage probability , computer network , electronic engineering , fading , telecommunications , decoding methods , wireless , mathematics , channel (broadcasting) , engineering , statistics , programming language
In this study, an overlay spectrum sharing scheme has been proposed for a cognitive radio system. To achieve the desired quality of service for the licenced (i.e. primary) system and spectrum access for unlicenced (i.e. secondary) system, a three‐phase cooperative decode and forward relaying is used. Furthermore, space–time block coding is used in order to cancel the interference at primary as well as secondary receiver. It has been shown that the proposed scheme helps in achieving diversity gain of three and two for primary and secondary systems, respectively. The performance of both primary and cognitive (secondary) system is appraised by deriving closed‐form expression for bit error rate and outage probability. The theoretical and simulation results validate that the proposed scheme improves the performance of both systems as compared with the earlier proposed schemes.