A Digital Frequency Synthesizer for Cognitive Radio Spectrum Sensing Applications

Author

Rapinoja, Tapio ; Stadius, Kari ; Xu, Liangge ; Lindfors, Saska ; Kaunisto, Risto ; Pärssinen, Aarno ; Ryynänen, Jussi

Author_Institution

Sch. of Sci. & Technol., Dept. of Microsci. & Nanosci., Aalto Univ., Espoo, Finland

Volume

58

Issue

5

fYear

2010

fDate

5/1/2010 12:00:00 AM

Firstpage

1339

Lastpage

1348

Abstract

This paper presents a wideband digital frequency synthesizer architecture targeted for spectrum sensing applications. The proposed frequency synthesizer architecture is based on digital period synthesis (DPS), which inherently can achieve a wide operational bandwidth, extremely high-frequency resolution, and an instantaneous settling time with low power and area consumption. The performance of DPS and its fundamental limitations are analyzed in this paper. The frequency synthesizer was implemented in a 65-nm CMOS process and it occupies an active area of 0.12 mm² . The frequency range of the synthesizer is from 0.1 to 4.267 GHz with a frequency resolution of 0.025-5.38 Hz. In this frequency range, the power consumption is between 3.6-8.4 mW.

Keywords

CMOS digital integrated circuits; cognitive radio; frequency synthesizers; CMOS process; cognitive radio spectrum sensing applications; digital frequency synthesizer; digital period synthesis; frequency 0.025 Hz to 5.38 Hz; frequency 0.1 GHz to 4.267 GHz; power 3.6 mW to 8.4 mW; size 65 nm; Cognitive radio; digital frequency synthesis; digital period synthesis (DPS); spectrum sensing;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2010.2042859

Filename

5438824