TITLE:
Hybrid Relaying Protocol for Joint Power and Subcarrier Allocation for OFDM Based Cognitive Radio Networks
AUTHORS:
Muthusamy Bhuvaneswari, Shama Srinivasa Rao Madane
KEYWORDS:
Orthogonal Frequency Division Multiplexing, Interference, Relay, Power, Amplify and Forward, Decode and Forward, Greedy Algorithm
JOURNAL NAME:
Circuits and Systems,
Vol.7 No.10,
August
23,
2016
ABSTRACT: This paper aims to avoid
the interference imposed by the secondary user on a primary user in Cognitive
Radio Network (CRN). In CRN, the interference from secondary user enforced on
primary user mainly depends on spectral interval between primary and secondary
systems. Moreover, it also depends on the power allocated to the secondary
user. In order to avoid interference imposed by secondary user on primary user,
a Hybrid Relaying Protocol for Joint Power and Subcarrier Allocation for
Orthogonal Frequency Division Multiplexing (OFDM) based Cognitive Radio
Networks is proposed. In hybrid relaying protocol, a secondary user uses
amplify and forward (AF) protocol and decode and forward (DF) protocol based on
the requirement to maximize network throughput. A greedy algorithm is proposed
for the selection of relay to get the optimal solution. Moreover, an efficient
hybrid power and subcarrier algorithm is used by considering interference
constraint imposed by cognitive network to the primary user.