On the Suitability of Discrete-Time Receivers for Software-Defined Radio

Ru, Zhiyu and Klumperink, Eric A.M. and Nauta, Bram (2007) On the Suitability of Discrete-Time Receivers for Software-Defined Radio. In: IEEE International Symposium on Circuits and Systems, ISCAS 2007, 27-30 May 2007 , New Orleans, LA.

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Abstract:	CMOS radio receiver architectures, based on radio frequency (RF) sampling followed by discrete-time (D-T) signal processing via switched-capacitor circuits, have recently been proposed for dedicated radio standards. This paper explores the suitability of such D-T receivers for highly flexible software-defined radio (SDR) receivers. Via symbolic analysis and simulations the authors analyze the properties of D-T receivers, and show that at least three challenges exist to make a D-T receiver work for SDR: 1) the sampling clock frequency is related to the radio frequency, complicating baseband filter design; 2) a frequency-dependent phase shift is introduced by pseudo-quadrature and pseudo-differential sampling; 3) the conversion gain of a charge sampling front-end is strongly frequency-dependent. Compared to a mixer based radio receiver, extra costs are needed to solve these problems
Item Type:	Conference or Workshop Item
Copyright:	© 2007 IEEE
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Integrated Circuit Design (ICD)
Link to this item:	http://purl.utwente.nl/publications/58148
Official URL:	http://dx.doi.org/10.1109/ISCAS.2007.378752
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