Improper Gaussian signaling (IGS) scheme has been recently shown to provide
performance improvements in interference-limited networks as opposed to the conventional …

In this paper, we consider a cognitive radio network consisting of a primary transmitter-
primary receiver pair, and a secondary base station-secondary receiver pair. To improve the …

Improper Gaussian signaling (IGS) has proven its ability in improving the performance of
underlay and overlay cognitive radio paradigms. In this paper, the interweave cognitive …

We consider an extension of the cognitive radio channel model in which the secondary
transmitter has to obtain (“learn”) the primary message in a first phase rather than having …

In this paper, we propose two limited feedback based underlay spectrum sharing schemes
in Poisson cognitive radio networks without and with primary exclusive regions, respectively …

In this paper, we propose a spectrum sharing mechanism with a two-phase two-way relaying
protocol for an overlay cognitive network. The system comprises two primary users (PUs) …

In this paper, we consider power allocation in multiband cognitive radio (CR) networks,
where multiple secondary users (SUs) transmit via a common relay and compete for the …

In this paper, an interference channel with a cognitive relay (IFC-CR) is considered to
achieve spectrum sharing between a licensed primary user and an unlicensed secondary …

In this paper, we consider a secondary broadcast network where a multi-antenna transmitter
broadcasts the same data toward a large number of secondary receivers (SRs) in the …

This paper studies the achievable cognitive sum rate of an overlay cognitive radio (CR)
system assisted with multiple antennas two-way relays in which primary users (PUs) …