This paper investigates the energy efficiency (EE) in multiple relay-aided OFDM systems,
where decode-and-forward (DF) relay beamforming is employed to help the information …

New radio vehicle-to-everything (NR-V2X) is an emerging technology based on the 5G
cellular mobile communication networks. In this paper, the sidelink (SL) resource allocation …

This paper investigates an energy efficiency optimization problem in cognitive orthogonal
frequency division multiplexing systems. The goal is to maximize the energy efficiency by …

Cognitive radio networks (CRNs) are expected to improve spectrum utilization efficiently by
allowing secondary users (SUs) to opportunistically access the licensed spectrum of primary …

This paper addresses the resource allocation (RA) problem in multi‐cell cognitive radio
networks. Besides the interference power threshold to limit the interference on primary users …

In this paper, we investigate a worst-case robust power allocation scheme to improve energy
efficiency (EE) for an amply-and-forward relaying uplink underlay OFDM cognitive radio …

In this paper, the energy efficiency maximization problem in OFDM-based cognitive relay
networks with incomplete spectrum sensing is investigated. Firstly, a secondary relay …

This paper analyzes closed-form outage probability of opportunistic amplify-and-forward
(AF) for orthogonal frequency division multiplexing (OFDM) relaying over Rician fading …

5G has pushed the use of radio spectrum to a new level, and cognitive clustering network
can effectively improve the utilization of radio spectrum, which is a feasible way to solve the …

Energy efficiency (EE) has now become one of the essential parameters in the design of 5G
and other next‐generation communication networks mainly due to economic and …