An Introduction to Spread-Spectrum Communications
An Introduction to Spread-Spectrum Communications
Centralized channel assignment and routing algorithms for multi-channel wireless mesh networks
ACM SIGMOBILE Mobile Computing and Communications Review
NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Dynamic Spectrum Access with QoS and Interference Temperature Constraints
IEEE Transactions on Mobile Computing
Cognitive Mesh Network Under Interference from Primary User
Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
Achievable rates and scaling laws for cognitive radio channels
EURASIP Journal on Wireless Communications and Networking - Cognitive Radio and Dynamic Spectrum Sharing Systems
Resource allocation for spectrum underlay in cognitive radio networks
IEEE Transactions on Wireless Communications - Part 2
Cognitive Multiple Access Via Cooperation: Protocol Design and Performance Analysis
IEEE Transactions on Information Theory
Hi-index | 0.00 |
In this paper, we develop a single user and a multi user version of a Distributed Underlay Channel Assignment (DUCHA) algorithm for spectrum access to a downlink channel of a primary cell for a cognitive cooperative ad hoc network overlaid with the cell. We use direct sequence spread spectrum as a medium interface for cognitive links. We investigate performance of DUCHA algorithm in three spreading scenarios with regard to the bandwidth of the channel. Simulation results show that when there are 100 cognitive channel applicants and spreading factor is 100 the multi user DUCHA algorithm assigns the channel to an average 51.8 percent of channel applicants and in this case it achieves 22.57 bps/Hz spectral efficiency under high power interference from the primary base station of the cell. We show that in this condition the increased in-band and out of band interference temperatures are non-harmful and have values of respectively 22.48 dB and -0.99 dB.