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A 0.25-3.25-GHz Wideband CMOS-RF Spectrum Sensor for Narrowband Energy Detection

Khatri, Vishal and Banerjee, Gaurab (2016) A 0.25-3.25-GHz Wideband CMOS-RF Spectrum Sensor for Narrowband Energy Detection. In: IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, 24 (9). pp. 2887-2898.

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Official URL: http://dx.doi.org/10.1109/TVLSI.2016.2530305

Abstract

A wideband spectrum sensing system for cognitive radio is designed and implemented in a 130-nm radio frequency mixed-mode CMOS technology. The system employs an I-Q downconverter, a pair of complex filters, and a pair of envelope detectors to perform the spectrum sensing from 250 MHz to 3.25 GHz. The design makes use of the band-pass nature of the complex filter to achieve two objectives: 1) separation of upper sideband and lower sideband around the local oscillator signal and 2) resolution of smaller bands within a large detection bandwidth. The measured sensitivity is close to -45 dBm for a single tone test over a bandwidth of 40 MHz. The measured image reject ratio is close to 30 dB. The overall wideband detection bandwidth is 250 MHz, which is partitioned into 40-MHz narrowband chunks with eight such overlapping chunks.

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
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Depositing User: Id for Latest eprints
Date Deposited: 03 Dec 2016 06:26
Last Modified: 03 Dec 2016 06:26
URI: http://eprints.iisc.ac.in/id/eprint/55283

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