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US 2004/0174932 A1Published application
Time domain equalizer and method
AssigneeTexas Instruments Incorporated
InventorsNirmal C. Warke, Arthur J. Redfern
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Abstract
Time domain equalizer determination for discrete multitone systems by tone error minimization from a starting point of a single-tone equalizer.
Claims11
A method of equalizer determination, comprising:
- (a) providing estimates of correlations of received multitone signals;
- and
- (b) determining a set of tap weights for a time domain equalizer from a minimization of the product of tone mean square errors of said multitone signals using said estimates;
- (c) wherein said minimization includes a multivariable optimization starting at an initial set of tap weights for a time domain equalizer, said initial set of tap weights corresponding to an equalizer for a single tone.
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A multitone receiver, comprising:
- (a) a time domain equalizer;
- (b) a block transformer coupled to an output of said time domain equalizer;
- and
- (c) a plurality of 1-tap frequency domain equalizers, each of said frequency domain equalizers coupled to an output of said block transformer;
- (d) wherein said time domain equalizer has tap weights characterized by a minimization of the product of tone mean square errors of outputs of said frequency domain equalizers, wherein said minimization includes a multivariable optimization starting at an initial set of tap weights for said time domain equalizer, said initial set of tap weights corresponding to an equalizer for a single tone.
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Dependencies are inferred from the claim text.