In this paper, we present an analytical modeling framework for supporting and evaluating
the impact of shadowing and beamforming on the topological connectivity of cognitive radio …

This paper investigates the impact of using directional antennas and beamforming schemes
on the connectivity of cognitive radio ad hoc networks (CRAHNs). Specifically, considering …

In conventional cognitive radio ad hoc networks, both primary users (PUs) and secondary
users (SUs) are typically equipped with omni-directional antennas, which can cause high …

Due to the spatial–temporal spectrum mobility in cognitive radio ad-hoc networks
(CRAHNs), multi-hop communication paths among secondary users have to detour or even …

In this paper, we investigate the impact of using directional antennas and beamforming
schemes on the connectivity of cognitive radio ad-hoc networks (CRAHNs). Specifically …

In cognitive radio ad hoc networks, omni-directional antennas are typically used at both
primary users (PUs) and secondary users (SUs), which can cause high interference. We …

In this paper, we study the connectivity of cognitive radio ad-hoc networks (CRAHNs) where
primary users (PUs) and secondary users (SUs) are randomly distributed in a given area …

Connectivity of large-scale wireless networks has received considerable attention in the past
several years. Different from traditional wireless networks, in Cognitive Radio Ad-hoc …

Frequency scarcity has emerged as a primary hurdle when trying to launch new wireless
communication services. However, recent spectrum utilization measurements have shown …

The number of hops between source node and destination node is a key parameter in
studying multi-hop wireless networks. Although hop count in wireless ad-hoc networks …