Fast two-stage spectrum detector for cognitive radios in uncertain noise channels

An enormous influx of wireless services and devices coupled with inefficient usage of electromagnetic spectrum has led to an apparent scarcity of usable radio bandwidth. Cognitive radio is leading the trend for increasing the spectrum efficiency by utilising the vacancy in the radio spectrum created...

Full description

Saved in:
Bibliographic Details
Main Authors: Nair, P. R., Krishna, A. K., Vinod, Achutavarrier Prasad, Smitha, Kavallur Gopi
Other Authors: School of Computer Engineering
Format: Article
Language:English
Published: 2013
Subjects:
Online Access:https://hdl.handle.net/10356/107333
http://hdl.handle.net/10220/16662
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-107333
record_format dspace
spelling sg-ntu-dr.10356-1073332020-05-28T07:17:43Z Fast two-stage spectrum detector for cognitive radios in uncertain noise channels Nair, P. R. Krishna, A. K. Vinod, Achutavarrier Prasad Smitha, Kavallur Gopi School of Computer Engineering DRNTU::Engineering::Computer science and engineering An enormous influx of wireless services and devices coupled with inefficient usage of electromagnetic spectrum has led to an apparent scarcity of usable radio bandwidth. Cognitive radio is leading the trend for increasing the spectrum efficiency by utilising the vacancy in the radio spectrum created by absence of the licensed primary user. This paradigm shift can only take place if the means to detect the primary user are well established so that an ecosystem can be created where both primary and secondary users can co-exist without interfering with each other. In this study the authors propose a two-stage detection mechanism which gives an improved performance over conventional single-stage detectors yet optimises the usage of the second stage, thereby reducing the sensing time as compared to conventional two-stage spectrum sensing algorithms. A hardware implementation of the algorithm has also been done to quantify the area and power consumption values. By utilising the second-stage optimally, the algorithm presented in this study helps in reducing the sensing time by 86% as compared with the conventional two-stage detector. By not activating the second stage at high SNRs, the proposed algorithm saves 0.915%W of dynamic power out of a total of 1.09%W, thus effectively reducing the dynamic power consumption by 84%. 2013-10-21T07:33:06Z 2019-12-06T22:29:00Z 2013-10-21T07:33:06Z 2019-12-06T22:29:00Z 2012 2012 Journal Article Nair, P. R., Vinod, A. P., Smitha, K. G., & Krishna, A. K. (2012). Fast two-stage spectrum detector for cognitive radios in uncertain noise channels. IET Communications, 6(11), 1341-1348. 1751-8628 https://hdl.handle.net/10356/107333 http://hdl.handle.net/10220/16662 10.1049/iet-com.2011.0751 en IET communications
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Computer science and engineering
spellingShingle DRNTU::Engineering::Computer science and engineering
Nair, P. R.
Krishna, A. K.
Vinod, Achutavarrier Prasad
Smitha, Kavallur Gopi
Fast two-stage spectrum detector for cognitive radios in uncertain noise channels
description An enormous influx of wireless services and devices coupled with inefficient usage of electromagnetic spectrum has led to an apparent scarcity of usable radio bandwidth. Cognitive radio is leading the trend for increasing the spectrum efficiency by utilising the vacancy in the radio spectrum created by absence of the licensed primary user. This paradigm shift can only take place if the means to detect the primary user are well established so that an ecosystem can be created where both primary and secondary users can co-exist without interfering with each other. In this study the authors propose a two-stage detection mechanism which gives an improved performance over conventional single-stage detectors yet optimises the usage of the second stage, thereby reducing the sensing time as compared to conventional two-stage spectrum sensing algorithms. A hardware implementation of the algorithm has also been done to quantify the area and power consumption values. By utilising the second-stage optimally, the algorithm presented in this study helps in reducing the sensing time by 86% as compared with the conventional two-stage detector. By not activating the second stage at high SNRs, the proposed algorithm saves 0.915%W of dynamic power out of a total of 1.09%W, thus effectively reducing the dynamic power consumption by 84%.
author2 School of Computer Engineering
author_facet School of Computer Engineering
Nair, P. R.
Krishna, A. K.
Vinod, Achutavarrier Prasad
Smitha, Kavallur Gopi
format Article
author Nair, P. R.
Krishna, A. K.
Vinod, Achutavarrier Prasad
Smitha, Kavallur Gopi
author_sort Nair, P. R.
title Fast two-stage spectrum detector for cognitive radios in uncertain noise channels
title_short Fast two-stage spectrum detector for cognitive radios in uncertain noise channels
title_full Fast two-stage spectrum detector for cognitive radios in uncertain noise channels
title_fullStr Fast two-stage spectrum detector for cognitive radios in uncertain noise channels
title_full_unstemmed Fast two-stage spectrum detector for cognitive radios in uncertain noise channels
title_sort fast two-stage spectrum detector for cognitive radios in uncertain noise channels
publishDate 2013
url https://hdl.handle.net/10356/107333
http://hdl.handle.net/10220/16662
_version_ 1681057533771382784