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A Disruptive Receiver Architecture Dedicated to Software-Defined Radio

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6 Author(s)
Rivet, F. ; Univ. of Bordeaux, Talence ; Deval, Y. ; Begueret, J. ; Dallet, D.
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The next generation of mobile terminals is faced with the emergence of the software-defined radio (SDR) concept. The communication devices tend to provide various wireless services through a multi-functional, multi-mode and multi-standard terminal. The SDR concept aims at designing a re-configurable radio architecture accepting all cellular or noncellular standards working in the 0-5-GHz frequency range. Some technical challenges have to be solved in order to address this concept. Working in the digital domain may be a solution but the analog-to-digital conversion cannot be done at Radio Frequencies, at an acceptable resolution and at an acceptable level of power consumption. The idea proposed here was to interface an analog pre-processing circuit between the antenna and a digital signal processor to pre-condition the RF signal. It uses the principle of a fast Fourier transform to carry out basic functions with high accuracy in a low-cost technology like CMOS. This paper presents the design and the behavioral simulations of this analog discrete-time device which gives the hardware flexibility required for a cognitive radio component.

Published in:

Circuits and Systems II: Express Briefs, IEEE Transactions on  (Volume:55 ,  Issue: 4 )

Date of Publication:

April 2008

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