Open AccessPerformance analysis of NOMA with generalised selection combining receivers
Author(s) -
Kumar Vaibhav,
Cardiff Barry,
Flanagan Mark F.
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2019.2948
Subject(s) - noma , selection (genetic algorithm) , expression (computer science) , correctness , computer science , outage probability , upper and lower bounds , closed form expression , algorithm , topology (electrical circuits) , mathematics , telecommunications , fading , artificial intelligence , telecommunications link , combinatorics , mathematical analysis , decoding methods , programming language
In this Letter, the authors present a comprehensive performance analysis of a non‐orthogonal multiple access (NOMA) system with generalised selection combining (GSC), which bridges the gap between the performance of NOMA with selection combining (SC) and NOMA with maximal‐ratio combining (MRC). In particular, the authors derive a closed‐form expression for an upper bound on the average achievable sum rate and an exact closed‐form expression for the outage probability. The analysis reveals a tradeoff between the number of implemented receiver radio‐frequency (RF) chains and the achieved performance and can be used to determine the appropriate number of paths to combine into a practical receiver design. A demonstrated agreement between the analytical and simulation results confirms the correctness of the analysis.