Joint sensing time and power allocation in cognitive networks with amplify-and-forward cooperation

Cognitive radio is a novel approach to cope with spectrum scarcity, in which either a network or a wireless node changes its transmission or reception parameters to communicate efficiently. However, it is difficult to avoid the interference between licensed and unlicensed users in various scenarios....

Full description

Saved in:
Bibliographic Details
Published in:Annales des télécommunications 2018-06, Vol.73 (5-6), p.391-399
Main Authors: Ruan, Shunling, Zhao, Chengshi, Jiang, Song, Kwak, Kyungsup
Format: Article
Language:English
Subjects:
Amplification
Circuits
Cognitive radio
Communications Engineering
Computer Communication Networks
Cooperation
Detection
Engineering
Information and Communication
Information Systems and Communication Service
Networks
Power management
R & D/Technology Policy
Signal,Image and Speech Processing
Wireless communications
Wireless networks
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Cognitive radio is a novel approach to cope with spectrum scarcity, in which either a network or a wireless node changes its transmission or reception parameters to communicate efficiently. However, it is difficult to avoid the interference between licensed and unlicensed users in various scenarios. This paper analyzes the jointly optimized allocation of sensing time and power for a two-user, amplify-and-forward (AF) cognitive network developed by maximizing the average aggregate throughput of its secondary network. In particular, this paper discusses diverse cooperation ratios for different scenarios and a unique cooperation ratio in spite of scenario changes. The observations of experiment results indicate that the sensing duration is within a strict interval. The results show that the optimized sensing time is 14.111 ms and the aggregate throughput equals to 1.1451 bps/Hz which are tractable by sequential optimization. This result indicates that by adopting the fixed cooperation ratios, the achievable throughput of the system is decreased. The system innovatively creates multiple independent fading channels to achieve technological diversity among partners.
ISSN:0003-4347
1958-9395
DOI:10.1007/s12243-018-0625-8