Investigation on Multiuser Diversity in Spectrum Sharing Based Cognitive Radio Networks

TL;DR

This paper explores a novel multiuser interference diversity in cognitive radio networks, analyzing its impact on throughput and comparing it with conventional networks without primary links.

Contribution

It introduces and analyzes multiuser interference diversity, a new form of multiuser diversity, in spectrum sharing cognitive radio networks.

Findings

Multiuser interference diversity enhances spectrum efficiency.

Ergodic throughput is improved with the proposed diversity.

Comparison shows benefits over conventional networks without primary links.

Abstract

A new form of multiuser diversity, named \emph{multiuser interference diversity}, is investigated for opportunistic communications in cognitive radio (CR) networks by exploiting the mutual interference between the CR and the existing primary radio (PR) links. The multiuser diversity gain and ergodic throughput are analyzed for different types of CR networks and compared against those in the conventional networks without the PR link.