Unified approach for measurement on modulated signal

Abstract

The functional block architecture implementing the method to measure the carrier frequency error of the single carrier digital modulations is presented. It is able to operate on the single carrier digital modulated signals M-ASK, M-QAM and M-PSK. The functional block architecture, obtained from the Software Radio architecture, is based on the cascade of the Analog to Digital Converter (ADC), the Digital Down Converter and the base band processing. The performance of this cascaded architecture is analyzed by considering three different ADC architectures based on: the pipeline, the single quantizer loop modulator, and the Multistage Noise Shaper (MASH) modulator. Numerical tests confirm the important role of the ADC in this architecture, and highlight that the Band Pass MASH modulator based ADC offers interesting performances. Consequently, it candidates to be implemented in hardware and to be used in advanced measurement instrument.

The results of research given to pointed out the functional block implementing the method for the carrier frequency error measurement are presented in [97].