Optimal Transmission Time of Secondary User in an Overlay Cognitive Radio System
Document Type
Conference Proceeding
Publication Date
4-27-2009
Publication Title
Sixth International Conference on Information Technology: New Generations
Publisher
IEEE
First page number:
1269
Last page number:
1274
Abstract
Optimal Opportunistic channel access of the unlicensed users has been a major problem in a cognitive radio system. In this paper, we consider an overlay cognitive radio system, where the secondary user senses the channel for an empty slot and transmits a constant power for a time period without sensing the channel again. We obtain the optimal transmission time of the secondary user to achieve the maximum data rate while keeping the interference on the primary user under a given threshold. We derive closed-form expressions for the interference at the primary receiver side and the achievable data rate of the secondary user. Our analysis is based on a Markov model for the primary user statuses and we consider the probability of error in sensing by the secondary user. Computer simulation results of the system show the validity of our analysis.
Keywords
Cognitive radio networks; Markov processes; Radio resource management (Wireless communications); Radio--Transmitters and transmission; Wireless communication systems
Disciplines
Digital Communications and Networking | Energy Systems | Engineering | Mechanical Engineering
Language
English
Permissions
Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.
Repository Citation
Bastami, B. A.,
Saberinia, E.
(2009).
Optimal Transmission Time of Secondary User in an Overlay Cognitive Radio System.
Sixth International Conference on Information Technology: New Generations
1269-1274.
IEEE.