Power Control Technique in Cognitive Radio Networks Using Smart Antennas
Date Issued
2010
Date
2010
Author(s)
Chang, Tai-Wei
Abstract
The co-existence and simultaneous transmission for primary users and cognitive radio users in the cognitive network attract the researching interesting. The smart antenna technology has been widely adopted in wireless environment to prevent the interference outside the expected transmission direction together with advantage of power saving by antenna directional gain to improve the system communication quality. That is intuitively witness that the different transmission pairs can communicate once when those interference among transmission pairs below the tolerance threshold since cognitive radio users do not transmit in the mutual interfering area, called restricted area .
Power control is another popular mechanism to reduce the interference. In this thesis we combine the concepts of smart antenna and power control. The feasibility study demonstrates the simultaneous transmission scenario among primary users and cognitive radio users when they locate at spectacular topology or not within the restricted area. Power control can further solve some problems which met in restrict area to increase the successful decodable rate. The channel mismatch and location uncertainty are also studied in this research.
Subjects
Cognitive Radio Networks
Smart Antennas
Power Control
Coexistence System
Channel Mismatch
Location Uncertaity
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-99-R97942058-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):b40d4b06c7002912b7fd8a148af0999e