NDLI: Robust Spectrum Sensing and User Identification for PCP-OFDM Signal Using Noise Insensitive Threshold

Content Provider	IEEE Xplore Digital Library
Author	Hao Li Xianbin Wang Chouinard, J.-Y.
Copyright Year	2010
Abstract	To ensure proper operations of primary users and a fair spectrum sharing among the secondary users, spectrum sensing and user identification at cognitive radio (CR) have to be achieved with high accuracy under low signal- to-noise ratio (SNR). Motivated by the unavailability of perfect synchronization and prior noise knowledge at the CR sensing device, a robust sensing and user identification technique using noise insensitive threshold under low SNR is proposed in this paper for signals from precoded cyclic prefix Orthogonal Frequency Division Multiplexing (PCP-OFDM) system, which is proposed recently to provide a fast-adapting CR communication platform using a PCP enabled signaling link for dynamic system interaction [1]. The proposed spectrum sensing and user identification are achieved with time domain cyclic correlations based on the inherent PCP feature in the received signals. Different users are distinguished in the sensing process with their unique PCPs. The impact of unknown noise statistics on the sensing threshold determination is removed with the proposed correlation ratio metric. The effect of unknown timing offset is also mitigated with the cyclic correlations. Numerical results are provided to verify the analysis and evaluate the performance of the proposed algorithm.
Starting Page	1
Ending Page	5
File Size	178359
Page Count	5
File Format	PDF
ISBN	9781424435739
ISSN	10903038
DOI	10.1109/VETECF.2010.5594271
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-06
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM Sensors Correlation Chromium Signal to noise ratio Cognitive radio
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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