This paper investigates physical layer security of non-orthogonal multiple access (NOMA) in
cognitive radio (CR) networks. The techniques of NOMA and CR have improved the …

we propose an overlay cooperative cognitive radio (CR) non-orthogonal multiple access
(NOMA) network which has channel estimation errors and imperfect successive interference …

This paper studies a new amplify-and-forward cooperative overlay cognitive radio (CR) non-
orthogonal multiple access (AFCO-NOMA) system, where a primary network shares its …

In this paper, we employ power-domain non-orthogonal multiple access (NOMA) to
simultaneously transmit signals to both a primary user (PU) and a secondary user (SU) of a …

With the development of the mobile communication and intelligent information technologies,
the intelligent transportation systems driven by the sixth generation (6G) has many …

In this paper, the performance of overlay cognitive radio (CR) in secondary networks as
utilizing non-orthogonal multiple access (NOMA) is examined. We consider transmission …

In this paper underlay cognitive radio system is analyzed in Nakagami fading environment,
for the case when the available channel state information (CSI) of the link from the …

For wireless transmission, the assumption that the transmitter always obtains the channel
state information (CSI) is unreasonable because of feedback delays, estimation error and …

Some problems of multi-user downlink power allocation and beamforming in a underlay
Cognitive Radio Network (CRN) with imperfect Channel State Information (CSI) are …

Recently, Non-orthogonal multiple access (NOMA) has been focused for the next generation
multiple access, which has more spectral efficiency under the limited spectrum bandwidth …