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2007
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On the Suitability of Discrete-Time Receivers for Software-Defined Radio

10 years 5 months ago
On the Suitability of Discrete-Time Receivers for Software-Defined Radio
—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 softwaredefined radio (SDR) receivers. Via symbolic analysis and simulations we 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 pseudoquadrature and pseudo-differential sampling; 3) the conversion gain of a charge sampling front-end is strongly frequencydependent. Compared to a mixer based radio receiver, extra costs are needed to solve these problems.
Zhiyu Ru, Eric A. M. Klumperink, Bram Nauta
Added 04 Jun 2010
Updated 04 Jun 2010
Type Conference
Year 2007
Where ISCAS
Authors Zhiyu Ru, Eric A. M. Klumperink, Bram Nauta
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