Patent ID: 6215430
Filing Date: 2001-04-10
Classification: H03D

Abstract:
A method for processing a digital signal for analog transmission, the method comprising the steps of:up-sampling a digital signal to produce a digital up-sampled signal having signal components in a plurality of Nyquist bands including a first Nyquist band and a plurality of super-Nyquist bands at higher frequencies than the first Nyquist band, wherein the first Nyquist band includes a plurality of signal components, including a baseband signal component and a plurality of aliased signal components;selecting, from the digital up-sampled signal, one of the plurality of signal components in the first Nyquist band; andoutputting the selected one of the plurality of signal components at a frequency that will cause a digital to analog converter to output an aliased signal component in a super-Nyquist band nearer an anticipated peak amplitude of a filtering characteristic of the digital to analog converter than an aliased signal component in the super-Nyquist band that would be created by the baseband signal component.