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\Sigma \Delta ADC-Based Frequency-Error Measurement in Single-Carrier Digital Modulations

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3 Author(s)
Carni, D.L. ; Meas. Lab., Calabria Univ. ; Grimaldi, D. ; Serratore, L.

This paper deals with the functional-block architecture implementing the new method to measure the carrier frequency error of the single-carrier digital modulations. The method is able to operate on the modulations M-ary amplitude shift keying, M-ary phase shift keying, and M-ary quadrature amplitude modulation used in the telecommunication systems. The functional-block architecture obtained from the software-radio (SR) architecture is based on the cascade of the analog-to-digital converter (ADC), the digital down converter, and the base-band processing. Looking at the implementation in measurement instrumentation, the performance of this cascaded architecture is investigated by considering three different ADC architectures. They are based on 1) pipeline; 2) single quantizer loop Sigma-Delta (SigmaDelta) modulator; and 3) multistage noise shaper (MASH) SigmaDelta modulator. Numerical tests confirm the important rule of the ADC in this architecture and highlight the interesting performance of the MASH-based SigmaDelta modulator for use in advanced measurement instruments

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:55 ,  Issue: 5 )

Date of Publication:

Oct. 2006

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