Title :
Towards non-uniformly controlled charge domain sample and hold for SDR receiver baseband stage
Author :
Ben-Romdhane, Manel ; Rebai, Oussama ; Masmoudi, Mohamed ; Rebai, Chiheb
Author_Institution :
GRESCOM Research Lab., SUP´COM, University of Carthage, Tunisia
Abstract :
The time-quantized pseudorandom sampling (TQ-PRS) offers alias attenuation. The TQ-PRS-based baseband stage in a software defined radio (SDR) profit from this advantage to relax constraints on the analog-to-digital converter (ADC) and the anti-aliasing filter (AAF). However, the spectrum analysis of the TQ-PRS-controlled ADC experimental test results shows spurious replicas which are not present in simulation results. In this paper, the presented investigations show that a charge domain sample and hold circuit prior to the ADC can attenuate the spurious replicas with at least 7 dB. A solution to more attenuate the spurious replicas consists on a discrete-time switched-capacitor filter stage in charge domain.
Keywords :
Analog-digital conversion; Passband; Receivers; Software radio; analog-to-digital converter; charge domain sample and hold circuit; multistandard receiver; software defined radio; time-quantized pseudorandom sampling;
Conference_Titel :
Design & Technology of Integrated Systems in Nanoscale Era (DTIS), 2012 7th International Conference on
Conference_Location :
Gammarth
Print_ISBN :
978-1-4673-1926-3
DOI :
10.1109/DTIS.2012.6232971