Outage Performance of Cooperative Underlay CR-NOMA with Imperfect CSI

Sultangali Arzykulov; Theodoros Tsiftsis; Galymzhan Nauryzbayev; Mohamed Abdallah

doi:10.1109/LCOMM.2018.2878730

Outage Performance of Cooperative Underlay CR-NOMA with Imperfect CSI

Sultangali Arzykulov, Theodoros Tsiftsis, Galymzhan Nauryzbayev, Mohamed Abdallah

Research output: Contribution to journal › Article › peer-review

137 Citations (Scopus)

Abstract

In this letter, a decode-and-forward cooperative underlay cognitive radio (CR) non-orthogonal multiple access (NOMA) network is studied. Exact closed-form expressions for the outage probability (OP) of two NOMA secondary destination users (U1 and U2) are derived in the case of imperfect channel state information. Then, we find optimal power allocation factors for different distances of U1 to satisfy the OP fairness for both users. Moreover, the proposed system model shows the superiority of the CR-NOMA compared to the cooperative OMA. The derived analytical expressions are corroborated through Monte Carlo simulations.

Original language	English
Pages (from-to)	176-179
Number of pages	4
Journal	IEEE Communications Letters
Volume	23
Issue number	1
DOIs	https://doi.org/10.1109/LCOMM.2018.2878730 https://doi.org/10.1109/LCOMM.2018.2878730
Publication status	Published - Jan 2019

Keywords

Cognitive radio (CR)
decode-and-forward (DF)
Downlink
Interference
NOMA
non-orthogonal multiple access (NOMA)
outage probability (OP)
Relays
Signal to noise ratio
Silicon carbide
Two dimensional displays

ASJC Scopus subject areas

Modelling and Simulation
Computer Science Applications
Electrical and Electronic Engineering

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Cite this

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abstract = "In this letter, a decode-and-forward cooperative underlay cognitive radio (CR) non-orthogonal multiple access (NOMA) network is studied. Exact closed-form expressions for the outage probability (OP) of two NOMA secondary destination users (U1 and U2) are derived in the case of imperfect channel state information. Then, we find optimal power allocation factors for different distances of U1 to satisfy the OP fairness for both users. Moreover, the proposed system model shows the superiority of the CR-NOMA compared to the cooperative OMA. The derived analytical expressions are corroborated through Monte Carlo simulations.",

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Outage Performance of Cooperative Underlay CR-NOMA with Imperfect CSI

Abstract

Keywords

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