… NOMA in cognitive radio (CR) network … relay selection problem in CR networks when
operating in the spectrum sharing model. Specifically, the secondary users (SUs) in the CR-NOMA …

… Wireless power transfer has been applied to cooperative NOMA in [7], as … of relay selection
on the performance of cooperative NOMA, and we focus on two types of relay selection criteria…

… Inspired by [6,28], this paper investigates adaptive relay selection and power allocation in
cooperative underlay CR-NOMA networks by considering mutual interference and constraints …

… of fixed power allocation based NOMA (F-NOMA) and cognitive radio based NOMA (CR-…
More particularly, via the assistance of the best relay selected, the QoS requirements of NOMA …

… a reactive relay scheme for cooperative CR-NOMA networks to select the best relay from
potential … Being focused on RS in CR-NOMA networks, this paper considers a cooperative CR-…

… relay selection scheme (PRSS) on cooperative underlay cognitive radio (CR) non-orthogonal
multiple access (NOMA) … Decodeand-forward (DF) protocol is used at the selected relay to …

… our relay selection criteria are adaptive according to whether or not the near user needs help
… feedbacks, we correspondingly design two different selection criteria to find the best relay. …

… be achieved as deploying relay selection schemes. In this investigation, NOMA and CR
scheme are considered as promising techniques to introduce new model of CR-NOMA and to …

… relay selection in cooperative NOMA networks [16]. The authors proposed a twostage relay
selection … using max-min criteria to satisfy the QoS of destination users. Sum rate and outage …

… criteria, all relays are selected in turn to transmit received NOMA signals to the users. In
this network, the BS firstly sends superposed signal to the relays in time slot 1. And then the …