Traditional spectrum allocation policies may result in temporarily unused radio spectrum.
Cognitive radio (CR) has emerged as a promising technology to exploit the radio spectrum …

In this paper, we study the performance of a downlink non-orthogonal multiple access-based
cooperative relay system with a single relay over Nakagami-m fading channels, where both …

This paper considers the problem of radio resource allocation in an orthogonal frequency-
division multiple access based cognitive radio (CR) network that opportunistically operates …

Since the electromagnetic spectrum resource is becoming more and more scarce, improving
spectral efficiency is becoming extremely important for the sustainable development of …

A spectrum-sharing communication system where the secondary user is aware of the
instantaneous channel-state information (CSI) of the secondary link but knows only the …

This letter presents the outage performance analysis for a cognitive relay network (CRN)
with imperfect channel knowledge estimations. Under the condition of imperfect channel …

Conventional investigations on the capacity of a secondary link in spectrum sharing
environments have assumed that a secondary user knows perfect channel information …

In order to achieve better statistical Quality-of-Service (QoS) provisioning for cognitive radio
networks (CRN), in this paper, we develop a hybrid underlay/overlay transmission mode for …

This paper studies the throughput of spectrum sharing networks utilizing rate adaptation. We
use some recent results on the achievable rates of finite block-length codes to analyze the …

We examine the impact of limited channel knowledge on the secondary user (SU) in a
cognitive radio system. Under a minimum signal-to-interference noise ratio (SINR) constraint …