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IEICE TRANSACTIONS on Fundamentals

A Low-Power Multi Resolution Spectrum Sensing Architecture for a Wireless Sensor Network with Cognitive Radio

Toshihiro KONISHI, Shintaro IZUMI, Koh TSURUDA, Hyeokjong LEE, Takashi TAKEUCHI, Masahiko YOSHIMOTO, Hiroshi KAWAGUCHI

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Summary :

Concomitantly with the progress of wireless communications, cognitive radio has attracted attention as a solution for depleted frequency bands. Cognitive radio is suitable for wireless sensor networks because it reduces collisions and thereby achieves energy-efficient communication. To make cognitive radio practical, we propose a low-power multi-resolution spectrum sensing (MRSS) architecture that has flexibility in sensing frequency bands. The conventional MRSS scheme consumes much power and can be adapted only slightly to process scaling because it comprises analog circuits. In contrast, the proposed architecture carries out signal processing in a digital domain and can detect occupied frequency bands at multiple resolutions and with low power. Our digital MRSS module can be implemented in 180-nm and 65-nm CMOS processes using Verilog-HDL. We confirmed that the processes respectively dissipate 9.97 mW and 3.45 mW.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E94-A No.11 pp.2287-2294
Publication Date
2011/11/01
Publicized
Online ISSN
1745-1337
DOI
10.1587/transfun.E94.A.2287
Type of Manuscript
Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category
Mobile Information Network and Personal Communications

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