Patent ID: 6760342
Filing Date: 2004-07-06
Classification: H04B,H04L

Abstract:
A channelizer for a multi-carrier receiver, the channelizer comprising:a plurality of digital sub-band tuners (DSBTs); each DSBT digitally filtering individual carrier data streams from a digital multi-carrier data stream based on a programmable center frequency; and each DSBT further digitally filtering the individual carrier data streams based on a programmable bandwidth; wherein each DSBT includes: a numerically controlled oscillator for generating a frequency conversion data stream based on the programmable center frequency; a digital mixer having a first input coupled to the oscillator for mixing the individual carrier data streams with the frequency conversion data stream; and a plurality of filter and decimate stages for digitally filtering the individual carrier data streams based on the programmable bandwidth; wherein the plurality of filter and decimate stages includes: a first stage coupled to a serial to parallel conversion module and a second input of the digital mixer, the first stage removing a first energy content from the individual carrier data streams; a second stage coupled to an output of the digital mixer, the second stage removing a second energy content from the individual carrier data streams; and a third stage coupled to the second stage, the third stage removing a third energy content from the individual carrier data streams.