GDL

Extending the Capability of Energy Detector for Sensing Of Heterogeneous Wideband Spectrum

ISSN : 0974 – 9322
Journal from gdlhub / 2017-08-14 11:52:34
Oleh : Oluwatobi Olabiyi1 and Annamalai Annamalai2, International Journal of Computer Networks & Communications
Dibuat : 2012-07-03, dengan 1 file

Keyword : Energy Detectors, Heterogeneous Wideband Spectrum Sensing, Modified Periodogram, Cognitive Radios
Subjek : Extending the Capability of Energy Detector for Sensing Of Heterogeneous Wideband Spectrum
Url : http://airccse.org/journal/cnc/0512cnc01.pdf
Sumber pengambilan dokumen : Internet

Reliable spectrum sensing is the very task upon which the entire operation of the cognitive radio rests.


Energy detection is one of the solutions that have been proposed for enabling opportunistic spectrum


access but its capability has limited sensitivity, no resolution and requires high sampling rate when


employed in the detection of wideband heterogeneous spectrum. This article proposes a solution that can


extend the capability of traditional energy detector to wideband sensing with improved performance. The


solution involves the use of parallel detection circuitry with each tuned to different frequencies. The


decision of each detection circuit can then be used to create a spectral map of the entire spectrum. This


introduces some resolution component and improved sensitivity based on the number of parallel circuits


and bandwidth of each detection circuit. Since the bandwidth of the incumbent signal is generally not


known a priori, there is possibility that it spans across multiple detectors. The detection of such wideband


signal can be achieved by either data or decision fusion of the results of each narrowband detector. We


show that the use of parallel multi-channel detection can greatly enhance the detection of wideband


signal compared to averaging while improving the resolution and sensitivity of energy detection of


wideband spectrum. Further performance improvement can be achieved through the use of diversity


reception on each narrow band detectors. Numerical results have been shown for representative cases


and careful review of previous works reveals that these have never been considered in literature.

Deskripsi Alternatif :

Reliable spectrum sensing is the very task upon which the entire operation of the cognitive radio rests.


Energy detection is one of the solutions that have been proposed for enabling opportunistic spectrum


access but its capability has limited sensitivity, no resolution and requires high sampling rate when


employed in the detection of wideband heterogeneous spectrum. This article proposes a solution that can


extend the capability of traditional energy detector to wideband sensing with improved performance. The


solution involves the use of parallel detection circuitry with each tuned to different frequencies. The


decision of each detection circuit can then be used to create a spectral map of the entire spectrum. This


introduces some resolution component and improved sensitivity based on the number of parallel circuits


and bandwidth of each detection circuit. Since the bandwidth of the incumbent signal is generally not


known a priori, there is possibility that it spans across multiple detectors. The detection of such wideband


signal can be achieved by either data or decision fusion of the results of each narrowband detector. We


show that the use of parallel multi-channel detection can greatly enhance the detection of wideband


signal compared to averaging while improving the resolution and sensitivity of energy detection of


wideband spectrum. Further performance improvement can be achieved through the use of diversity


reception on each narrow band detectors. Numerical results have been shown for representative cases


and careful review of previous works reveals that these have never been considered in literature.

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