Apparatus and method for a reduced component equalizer circuit
AssigneeTexas Instruments Incorporated
InventorsAlan Gatherer, Hiep Van Tran
Life of this patent
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Abstract
In an equalizer filter unit, the filter is divided into a plurality of sequential segments. While all the components of the equalizer unit multiply data signal groups by the a coefficient signal group, in only one segment are the coefficient signal groups updated. The data and the coefficient signal groups are periodically transferred to the next sequential filter segment while the filter segments are reconfigured in the original sequential order. In this manner, the each data signal group interacts with a coefficient signal group in the original sequential order. Because the coefficients are updated in only one of the filter segments, the amount of apparatus required for processing signal groups is reduced.
Claims12
An equalizer filter unit for processing data in iterations, comprising:
- a plurality of filter unit segments, said plurality of filter units coupled in a sequential configuration, wherein each filter segment includes;
- at least one stage, said stage having,
- a data signal group storage unit, and
- a coefficient signal group storage unit,
- signal transfer apparatus, said signal transfer apparatus transferring data and coefficient signal groups in each filter segment after at least one iteration from each such filter segment to a next sequential filter segment for use in said next sequential filter segment in at least one subsequent iteration;
- and
- a configuration unit for maintaining said sequential configuration of said filter units segments after transfer of said data and coefficient signal groups;
- wherein each stage in a preselected filter segment further has a coefficient signal group update unit.
A method for processing data in an equalizer filter unit in iterations, said method comprising the steps of:
- dividing said filter unit into a plurality of sequential segments;
- updating coefficients in a preselected segment of said filter;
- providing data to said equalizer filter;
- performing at least one iteration;
- transferring data and coefficient signal groups from components in each segment to similarly positioned components in a next sequential segment;
- reconfiguring said equalizer filter;
- and
- performing at least one additional iteration;
- wherein said an order of said sequential segments is maintained.
An equalizer filter unit responsive to an error signal for processing input data signal groups in iterations, said filter unit comprising:
- a first plurality of processing components each having a sequential coefficient signal group stored therein for processing a data signal group stored therein, said first plurality of components divided into a second plurality of sequential groups of components;
- updating apparatus responsive to said error signal for updating coefficient signal groups in a selected group of components;
- signal transfer apparatus for transferring data and coefficient signal groups from components in each group of components after at least one iteration to corresponding components in a next sequential group of components for use in said next sequential group of components in at least one subsequent iteration;
- and
- configuration apparatus for maintaining said components in an initial sequence.
An equalizer filter unit for processing input signal groups in iterations, comprising:
- a first plurality of components in a sequential order for processing input signal groups in said sequential order for at least one interation, each component having coefficient units storing coefficient signal groups used in processing said input signal groups, said first plurality of components being configured in a second plurality of component groups, wherein components in a selected component group include coefficient update apparatus responsive to an error signal for updating said coefficient stored in each component of said selected component group;
- transfer apparatus for transferring data and coefficient signal groups from components in each component group after said at least one interation to corresponding components in a next sequential component group;
- and
- reconfiguration apparatus for configuring said second plurality of component groups, wherein input signals are processed in at least one subsequent iteration in said sequential order after said transfer of data and coefficient signal groups.
Dependencies are inferred from the claim text.