Patent ID: 6975685
Filing Date: 2005-12-13
Classification: H04L

Abstract:
1. A receiver system configured to receive digitally modulated signals for use in a communications system employing a transmitter configured to transmit digitally modulated signals operating in a band of frequencies that is divided into two or more non-overlapping channels, with each channel occupying no more than a predetermined maximum frequency band, the receiver system comprising: one or more analog to digital converters (ADCs), the number of ADCs being less than the number of non-overlapping channels, the one or more ADCs being configured to convert the entire band containing two or more non-overlapping channels to a digital data stream sampled at a rate of at least twice the highest frequency within the band; a front end processor configured to receive the data stream and to down-convert to baseband and decimate this data stream to produce an output data stream that represents each channel within the band, with samples for each channel within the band at a rate that is a multiple of the symbol rate for the corresponding channel; and a receiver containing an indexer configured to operate on the output data stream, sequencing through the two or more non-overlap channels so that data, including phase state, time state, and equalizer state, related to each channel is processed in sequence to phase correct, time correct, and equalize the output data stream for all the non-overlapping channels.