Apparatus and method for multi-channel receiver
AssigneeAgere Systems Inc.
InventorJohn Steven Merriam, Jr.
Life of this patent
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Abstract
A receiver for use in a communications system that employs 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 operates upon a data stream representative of the entire band, with each channel within the band converted to baseband and sampled at twice the symbol rate of the related channel. The receiver equalizes, provides phase and timing correction for each of the channels, cycling through the data related to each channel in sequence, thereby requiring only one the phase recovery, one timing recovery and one equalization circuit for all the channels within the multi-channel band, each of which is re-used for each channel.
Claims35
A receiver for use in a communications system that employs digitally modulated signals operating in a communications band of frequencies that is divided into two or more non-overlapping channels comprising:
- an input for receiving a data stream representative of the communications band, with each channel within the communications band having been converted to baseband and sampled at a rate of at least twice the symbol rate of the corresponding channel;
- an equalizer configured to equalize the data for each of the two or more non-overlapping channels;
- a timing recovery circuit configured to recover timing information for each of the two or more non-overlapping channels;
- a phase recovery circuit configured to recover phase information for each of the two or more non-overlapping channels;
- and
- an indexer that controls the cycling of data through the equalizer, the timing recovery, and phase recovery circuits so that data related to each channel is processed by each of the equalizer, the timing recovery, and phase recovery circuits in sequence, thereby requiring only one phase recovery, one timing recovery and one equalization circuit for all the channels within the communications band.
A method for receiving signals in a communications system that employs digitally modulated signals operating in a communications band of frequencies that is divided into two or more non-overlapping channels comprising the steps of:
- (A) receiving at an input a data stream representative of the communications band, with each channel within the communications band converted to baseband and sampled at a rate of at least twice the symbol rate of the corresponding channel;
- (B) equalizing the data for each of the two or more non-overlapping channels in an equalizer circuit;
- (C) recovering timing information for each of the two or more non-overlapping channels in a timing recovery circuit;
- (D) recovering phase information for each of the two or more non-overlapping channels in a phase recovery circuit;
- and
- (E) indexing the cycling of data through the equalizer, the timing recovery, and phase recovery circuits so that data corresponding to each channel is processed by each of the equalizer, the timing recovery, and phase recovery circuits in sequence, thereby requiring only one phase recovery, one timing recovery and one equalization circuit for all the channels within the communications band.
Dependencies are inferred from the claim text.