Detecting Low-Power Primary Signals via Distributed Sensing to Support Opportunistic Spectrum Access

Cognitive radio operation with opportunistic spectrum access has been proposed to utilize spectrum holes left unused by a primary system owning the spectrum license. The key of cognitive radio operation is the ability to detect weak primary signals and to control the transmission of cognitive users...

Full description

Saved in:
Bibliographic Details
Main Authors: Fodor, V., Glaropoulos, I., Pescosolido, L.
Format: Conference Proceeding
Language:English
Subjects:
Cognitive radio
Cognitive systems
Communications Society
Control systems
Electric network topology
Fading
Frequency
Genetic programming
Information technology
Informationsteknik
Interference
Licenses
Paper technology
Power spectrum
Radio broadcasting
Radio control
Radio transmission
Signal detection
Spectroscopy
TECHNOLOGY
TEKNIKVETENSKAP
Telecommunication
Telekommunikation
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Cognitive radio operation with opportunistic spectrum access has been proposed to utilize spectrum holes left unused by a primary system owning the spectrum license. The key of cognitive radio operation is the ability to detect weak primary signals and to control the transmission of cognitive users in a way that interference between the two systems is minimized. In this paper we evaluate how a sensor network deployed to provide distributed spectrum sensing can assist cognitive operation. Specifically, we consider sensor networks with regular topology, where a high level of cooperation also means that sensors far from the source of the primary signal are involved in the sensing process. Assuming energy detection and hard-decision combining we derive worst case probabilities of missed detection and false alarm, determine the necessary level of cooperation among the sensors and evaluate how the sensor density and the sensing time affect the performance of distributed sensing.
ISSN:1550-3607
1938-1883
DOI:10.1109/ICC.2009.5198909