Premium
Performance analysis of cooperative spectrum sharing using non‐orthogonal multiple access
Author(s) -
Kader Md Fazlul,
Shin Soo Young
Publication year - 2017
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.3481
Subject(s) - computer science , rayleigh fading , transmitter , relay , computer network , ergodic theory , cognitive radio , fading , spectral efficiency , protocol (science) , superposition principle , coding (social sciences) , throughput , algorithm , topology (electrical circuits) , decoding methods , wireless , telecommunications , mathematics , channel (broadcasting) , medicine , mathematical analysis , power (physics) , physics , alternative medicine , statistics , quantum mechanics , pathology , combinatorics
Summary This paper presents a cooperative spectrum sharing protocol using non‐orthogonal multiple access in cognitive radio networks. A 2‐phase protocol comprising of a primary transmitter‐receiver pair and a secondary transmitter‐receiver pair is considered. In the proposed protocol, 3 data symbols can be transmitted during the 2 phases; this is unlike the traditional decode‐and‐forward relaying where 1 data symbol can be transmitted and the conventional superposition coding–based overlay spectrum sharing and the cooperative relaying system using non‐orthogonal multiple access where 2 data symbols can be transmitted, under a single‐relay scenario. We have investigated performance of our proposed protocol in terms of ergodic sum capacity and outage probability along with analytical derivations over independent Rayleigh fading channels. We also compared our proposed protocol with the traditional decode‐and‐forward relaying, conventional superposition coding–based overlay spectrum sharing, and the cooperative relaying system using non‐orthogonal multiple access schemes to demonstrate efficacy of the proposed protocol. The simulation and analytical results are presented to confirm efficiency of the proposed spectrum sharing protocol.