In this paper, multi‐users (MU) communications are considered based on the cognitive ratio
(CR) technique. Multiple‐input multiple‐output (MIMO) and non‐orthogonal multiple access …

This paper has collectively exploited cognitive radio (CR), non‐orthogonal multiple access
(NOMA) and multiple‐input‐multiple‐output (MIMO) communication systems in order to …

Non-orthogonal multiple access (NOMA) is emerging as a promising, yet challenging,
multiple access technology to improve spectrum utilization for the fifth generation (5G) …

Due to rapid increase in the wireless‐connected Internet‐of‐things (IoT) devices, the
communication among devices is a critical task as it relies on the radio‐frequency spectrum …

In this article, the performance of cognitive radio system benefits from non-orthogonal
multiple access (NOMA) scheme. We then examine system metrics to adjust its quality of …

In this paper, cognitive radio (CR) based on non-orthogonal multiple access (NOMA) is
considered over frequency non-selective Rayleigh fading channels. The two techniques are …

The primary objective of cognitive radio network is to effectively utilize the unused spectrum
bands. In cognitive radio networks, spectrum sharing between primary and secondary users …

Both non-orthogonal multiple access (NOMA), which can serve multiple users
simultaneously and on the same frequency, and cognitive radio (CR) can contribute to …

We consider in this paper, a spectrum sharing cognitive radio system with a ratio selection
scheme; where one out of N independent-and-identically-distributed transmit antennas is …

This paper proposes a massive multiple-input multiple-output (MIMO) non-orthogonal
multiple access (NOMA) system based on cognitive radio (CR) networks. To reduce the …