This paper proposes a probabilistic interference constraint method with a radio environment
map (REM) for spatial spectrum sharing. The REM stores the spatial distribution of the …

This paper analyzes the performance of an underlay cognitive radio based decode-and-
forward mixed multiple-input multiple-output radio frequency/free space optical cooperative …

We consider a cognitive wireless powered communication network sharing the spectrum
with a primary network, which faces security threats from eavesdroppers (EAVs). We …

In this paper, throughput achieved in cognitive radio channels with finite blocklength codes
under buffer limitations is studied. Cognitive users first determine the activity of the primary …

Novel analytic solutions are derived for integrals that involve the generalized Marcum Q-
function, exponential functions and arbitrary powers. Simple closed-form expressions are …

We consider a spectrum sharing scenario where a secondary transmitter (ST) communicates
with its destination via a decode-and-forward secondary relay (SR) in the presence of …

In this paper, we propose the novel concept of a spectrum database for improving the
efficiency of spectrum utilization. In the current design of TV white space spectrum …

We consider an opportunistic cognitive radio (CR) system in which secondary transmitter
(SU tx) is equipped with a reconfigurable antenna (RA). Utilizing the beam steering …

In this paper, we develop and analyze a novel performance metric, called interference
efficiency, which shows the number of transmitted bits per unit of interference energy …

This paper studies the symbol error rate performance of cognitive radio transmissions in the
presence of imperfect sensing decisions. Two different transmission schemes, namely …