Paper Info
Title
Cooperative spectrum sharing in cognitive radio networks: An interference free approach.
Abstract
We present a novel interference free dual-hop cooperative spectrum sharing protocol in cognitive radio networks exploiting spatial modulation (SM) at both primary transmitter (PT) and secondary transmitter (ST). A ST equipped with multi-antenna acts as a half-duplex decode-and-forward relay for the primary system. During phase-1, SM is invoked at PT, while ST keeps silent. The information bit stream of PT is mapped into two different sets: the M-ary phase shift keying (M-PSK)/M-ary quadrature amplitude modulation (M-QAM) bits and the antenna index. The ST then exploits iterative-maximum ratio combining (i-MRC) technique to de-map the block of information bits, transmitted by PT. During phase-2, ST forwards the primary data by activating only one antenna based on its own secondary data exploiting the concept of SM. The PT’s data is then retrieved at the primary receiver (PR) and the secondary receiver (SR) recover its own desired data by detecting only the transmit antenna indices of ST using i-MRC. As a result, mutual interference between primary and secondary systems is avoided and interference cancellation techniques at the PR and SR are no longer needed. In the proposed protocol, the primary user does not need to lease its spectrum or time slots to the secondary user in exchange for cooperation. Moreover, power of ST does not need to be distributed for primary and secondary transmission simultaneously during phase-2. The simulation and analytical results are presented to show effectiveness of the proposed protocol compared to conventional spectrum leasing and superposition coding based overlay protocols.
Year
DOI
Venue
2017
10.1016/j.phycom.2017.09.001
Physical Communication
Keywords
Field
DocType
Spatial modulation,Cognitive radio,Bit error rate,Interference free,Outage probability,Spectrum sharing
Topology,Transmitter,Quadrature amplitude modulation,Telecommunications,Computer science,QAM,Single antenna interference cancellation,Computer network,Interference (wave propagation),Phase-shift keying,Bit error rate,Cognitive radio
Journal
Volume
Issue
ISSN
25
P1
1874-4907
Citations 
PageRank 
References 
0
0.34
20
Authors
4
Name
Order
Citations
PageRank
Md. Fazlul Kader1728.26
Muhammad-Naeem Irfan26829.98
Soo Young Shin333462.53
Seog Chae400.34