METHOD AND SYSTEM FOR SPECTRAL LEAKAGE REMOVAL IN DAC TESTING

摘要

System and method for processing a signal sampled from an output of a digital-analog converter. The method comprises: (a) transforming the input signal from time domain to frequency domain to obtain a signal having a plurality of bins; (b) estimating properties of a largest amplitude bin, except for direct current (DC) bin, in the input signal; (c) performing signal reconstruction in time domain based on the estimated properties to generate a reconstructed signal; (d) subtracting the estimated signal from the input signal to get a residual signal; (e) repeating steps (a)-(d) till a predetermined number of bins have been processed; (f) adding all the reconstructed signals and the last residual signal together to generate a sum signal; and (g) transforming the sum signal from the time domain to the frequency domain.

主权项

1. A method of signal processing, the method comprising:
(a) receiving an input signal and determining a plurality of frequency bins contained in the input signal; (b) generating an estimated signal based on estimated properties of a largest amplitude frequency bin, except for any direct current (DC) bin, of the plurality of frequency bins; (c) generating a reconstructed signal for a respective frequency bin of the plurality of the frequency bins based on the estimated properties; (d) subtracting the estimated signal from the input signal to generate a residual signal; and (e) repeating (a)-(d) for a number of frequency bins of the plurality of frequency bins.