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A Mitigation Technique for Harmonic Downconversion in Wideband Spectrum Sensors

Khatri, Vishal and Banerjee, Gaurab (2015) A Mitigation Technique for Harmonic Downconversion in Wideband Spectrum Sensors. In: IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 64 (12). pp. 3226-3238.

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Official URL: http://dx.doi.org/10.1109/TIM.2015.2469415


The down conversion of radio frequency components around the harmonics of the local oscillator (LO), and its impact on the accuracy of white space detection using integrated spectrum sensors, is studied. We propose an algorithm to mitigate the impact of harmonic downconversion by utilizing multiple parallel downconverters in the system architecture. The proposed algorithm is validated on a test-board using commercially available integrated circuits and a test-chip implemented in a 130-nm CMOS technology. The measured data show that the impact of the harmonic downconversion is closely related to the LO characteristics, and that much of it can be mitigated by the proposed technique.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Keywords: Cognitive radios; harmonic downconversion; multiband radio frequency (RF) systems; spectrum sensing receivers
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Depositing User: Id for Latest eprints
Date Deposited: 30 Dec 2015 06:02
Last Modified: 30 Dec 2015 06:02
URI: http://eprints.iisc.ac.in/id/eprint/52937

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