Physical Layer Security in Cognitive Radio Networks Using Improper Gaussian Signaling

The Security of Physical Layer in Cognitive Radio Networks

—Cognitive Radio (CR) is a novel technology that promises to solve the lack of spectrum by allowing secondary users to use licensed band, so that they can coexist with primary users without causing interference to their communications. With the development of CR, extending to the level of network, cognitive radio networks (CRNs) emerge as the times require. Nowadays the operational aspects of ...

On Physical Layer Security for Cognitive Radio Networks

Security in Cognitive Radio Networks Security in Cognitive Radio Networks

While bringing the potential for solving the spectrum underutilization problem using methods such as dynamic and opportunistic spectrum access, Cognitive Radios (CRs) also bring a set of security issues and potential breaches that have to be addressed. These issues come out mainly from the two important capabilities implemented within CRs: their cognition ability and reconfigurability. This cha...

Improper Gaussian signaling for multiple-access channels in underlay cognitive radio

This paper characterizes the achievable rate region of an unlicensed multiple-access channel (MAC) that coexists with a licensed point-to-point user, following the underlay cognitive radio paradigm. We assume that every transceiver except the secondary base station has one antenna, and that the primary user (PU) is protected by a minimum rate constraint. In contrast to the conventional assumpti...

Countermeasure Against Physical Layer Attack in Cognitive Radio Networks

A “Cognitive radio” is a latest technology aiming to solve the spectrum scarcity problem by allocating the spectrum to secondary users. It aims to improve the utilization of the radio spectrum by reducing the spectrum holes. The existing systems that have been proposed so far provided the solution for some attacks in the Physical layer of Cognitive radio with a limited number of nodes, evaluate...