METHODS AND SYSTEMS FOR PROCESSING A DIGITAL SIGNAL BY ESTIMATING SIGNAL ENERGY AND NOISE POWER DENSITY

摘要

Systems and methods are described for processing a digital signal. In one embodiment, the method comprises receiving time-aligned input samples of an input signal; computing at least one moment using the time-aligned input samples; determining at least one of signal energy per symbol and noise power spectral density based on the at least one moment; and adjusting an input signal level based on the at least one of the signal energy per symbol and the noise power spectral density.