Patent ID: 6157682
Filing Date: 2000-12-05
Classification: H03D,H04B

Abstract:
A method of digitizing a signal having first and second non-contiguous frequency bands comprising the steps of:a) performing a first analog conversion on said signal to isolate and convert the spectrum of the first band into a first converted frequency band which lies below FS/2 where FS is a predetermined sampling frequency;b) performing a second analog conversion on said signal to isolate and convert the spectrum of the second band into a second converted frequency band which when sampled at said predetermined frequency FS will result in a digitized signal having an alias band between 0 and FS/2 which is a replica of the second converted band which does not have its I and Q sidebands reversed, the alias band not interfering with said first converted frequency band; andc) combining said first converted signal with said second converted signal and sampling at said predetermined sampling frequency with an analog-to-digital converter.