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Large-Signal Characterization of a Mixed-Signal SoC Receiver for Multiband SDR/CR Designs

Ribeiro, D. ; Cruz, P.M. ; Carvalho, N.B.C.

Large-Signal Characterization of a Mixed-Signal SoC Receiver for Multiband SDR/CR Designs, Proc European Microwave Week/European Microwave Conf., Rome, Italy, Vol. 1, pp. 1 - 4, October, 2014.

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Abstract
This paper shows a framework to evaluate the nonlinear distortion characteristic of a commercial mixed-signal wideband system-on-chip (SoC) receiver. An approach to obtain fully-synchronized amplitude and phase relationships between the analog input and digital output ports is described.
Measurement of AM/AM and AM/PM curves under a sinusoidal excitation are executed over a wide input power range, in order to extract device compression information at different carrier frequencies. As well, metrics for the in-band generated nonlinear distortion are obtained by exciting the mixed-signal SoC device with a two-tone signal, and then calculating the respective third-order intermodulation distortion ratio.