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US 7,583,729 B2Granted
Adaptive equalizer and related method thereof
AssigneeMediatek Inc.
InventorsPi-Hai Liu, Meng-Ta Yang
Life of this patent
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Abstract
An adaptive equalizer and the related method are disclosed. The adaptive equalizer is capable of adjusting its own equalization coefficients, and includes a reference signal generator for generating a reference signal according to a first reference source, an equalization unit for generating an equalized signal by processing a received signal through a plurality of equalization coefficients, a weighted signal generator for generating a weighted signal according to a second reference source, and a coefficient adapting circuit for adjusting the equalization coefficients according to the reference signal, the equalized signal, the weighted signal, and the received signal.
Claims56
An adaptive equalizer comprising:
- a reference signal generator for generating a reference signal according to a first reference source;
- an equalization unit for processing a received signal according to a plurality of equalization coefficients to generate an equalized signal;
- a weighted signal generator for generating a weighted signal according to a second reference source;
- and
- a coefficient adapting circuit for adjusting the plurality of equalization coefficients according to the reference signal, the equalized signal, the weighted signal, and the received signal;
- wherein the coefficient adapting circuit comprises:
- an error computing unit, electrically connected to the equalization unit and the reference signal generator, for generating an error signal corresponding to the difference between the equalized signal and the reference signal;
- a projecting unit, electrically connected to the error computing unit, for generating a projected received signal according to a projection vector and the received signal, and for generating a projected error signal according to the projection vector and the error signal;
- and
- a coefficient computing unit, electrically connected to the projecting unit and the weighted signal generator, for adjusting the plurality of equalization coefficients according to the weighted signal, the projected error signal, and the projected received signal.
7 more elements
An adaptive equalizer comprising:
- a reference signal generator for generating a reference signal according to a first reference source;
- an equalization unit for processing a received signal according to a plurality of equalization coefficients to generate an equalized signal;
- a weighted signal generator for generating a weighted signal according to a second reference source;
- and
- a coefficient adapting circuit for adjusting the plurality of equalization coefficients according to the reference signal, the equalized signal, the weighted signal, and the received signal;
- wherein the coefficient adapting circuit comprises:
- an error computing unit, electrically connected to the equalization unit and the reference signal generator, for generating an error signal corresponding to the difference between the equalized signal and the reference signal;
- a projecting unit, electrically connected to the error computing unit and the weighted signal generator, for generating a projected received signal according to a projection vector and the received signal, and for generating a projected error signal according to the projection vector and the error signal, wherein the projecting unit adjusts the projected received signal or the projected error signal according to the weighted signal;
- and
- a coefficient computing unit, electrically connected to the projecting unit, for adjusting the plurality of equalization coefficients according to the projected error signal and the projected received signal.
7 more elements
An adaptive equalizer comprising:
- a reference signal generator for generating a reference signal according to a first reference source;
- an equalization unit for generating an equalized signal by processing a received signal according to a plurality of equalization coefficients;
- and
- a coefficient adapting circuit for adjusting the plurality of equalization coefficients according to a projection vector, the reference signal, the equalized signal, and the received signal;
- wherein the coefficient adapting circuit comprises:
- an error computing unit, electrically connected to the equalization unit and the reference signal generator, for generating an error signal corresponding to the difference between the equalized signal and the reference signal;
- a projecting unit, electrically connected to the error computing unit, for generating a projected received signal according to the projection vector and the received signal, and for generating a projected error signal according to the projection vector and the error signal;
- and
- a coefficient computing unit, electrically connected to the projecting unit, for adjusting the plurality of equalization coefficients according to the projected error signal and the projected received signal.
6 more elements
An adaptive equalizing method comprising:
- generating a reference signal according to a first reference source;
- generating an equalized signal by processing a received signal according to a plurality of equalization coefficients;
- generating a weighted signal according to a second reference source;
- and
- adjusting the plurality of equalization coefficients according to the reference signal, the equalized signal, the weighted signal, and the received signal;
- wherein the step of adjusting the plurality of equalization coefficients comprises:
- generating an error signal corresponding to the difference between the equalized signal and the reference signal;
- generating a projected received signal according to a projection vector and the received signal;
- generating a projected error signal according to the projection vector and the error signal;
- adjusting the projected received signal or the projected error signal according to the weighted signal;
- and
- adjusting the plurality of equalization coefficients according to the projected error signal and the projected received signal.
9 more elements
An adaptive equalizing method comprising:
- generating a reference signal according to a first reference source;
- generating an equalized signal by processing a received signal according to a plurality of equalization coefficients;
- generating a weighted signal according to a second reference source;
- and
- adjusting the plurality of equalization coefficients according to the reference signal, the equalized signal, the weighted signal, and the received signal;
- wherein the step of adjusting the plurality of equalization coefficients comprises:
- generating an error signal corresponding to the difference between the equalized signal and the reference signal;
- generating a projected received signal according to a projection vector and the received signal;
- generating a projected error signal according to the projection vector and the error signal;
- and
- adjusting the plurality of equalization coefficients according to the projected error signal, the projected received signal, and the weighted signal.
8 more elements
An adaptive equalizing method comprising:
- generating a reference signal according to a first reference source;
- generating an equalized signal by processing a received signal according to a plurality of equalization coefficients;
- and
- adjusting the plurality of equalization coefficients according to a projection vector, the reference signal, the equalized signal, and the received signal;
- wherein the step of adjusting the plurality of equalization coefficients comprises:
- generating an error signal corresponding to the difference between the equalized signal and the reference signal;
- generating a projected received signal according to the projection vector and the received signal;
- generating a projected error signal according to the projection vector and the error signal;
- and
- adjusting the plurality of equalization coefficients according to the projected error signal and the projected received signal.
7 more elements
An adaptive equalizer comprising:
- a reference signal generator for generating a reference signal according to a first reference source;
- an equalization unit for processing a received signal according to a plurality of equalization coefficients to generate an equalized signal;
- a weighted signal generator for generating a weighted signal according to a second reference source;
- and
- a coefficient adapting circuit for adjusting the plurality of equalization coefficients according to the reference signal, the equalized signal, the weighted signal, and the received signal, wherein the coefficient adapting circuit comprises:
- an error computing unit, electrically connected to the equalization unit and the reference signal generator, for generating an error signal corresponding to the difference between the equalized signal and the reference signal;
- and
- a coefficient computing unit, electrically connected to the error computing unit and the weighted signal generator, for adjusting the plurality of equalization coefficients according to the weighted signal, the error signal and the received signal;
- wherein the weighted signal is generated according to level transition of a signal from the second reference source.
6 more elements
An adaptive equalizer comprising:
- a reference signal generator for generating a reference signal according to a first reference source;
- an equalization unit for processing a received signal according to a plurality of equalization coefficients to generate an equalized signal;
- a weighted signal generator for generating a weighted signal according to a second reference source;
- and
- a coefficient adapting circuit for adjusting the plurality of equalization coefficients according to the reference signal, the equalized signal, the weighted signal, and the received signal, wherein the coefficient adapting circuit comprises:
- an error computing unit, electrically connected to the equalization unit and the reference signal generator, for generating an error signal corresponding to the difference between the equalized signal and the reference signal;
- a projecting unit, electrically connected to the error computing unit, for generating a projected received signal according to a projection vector and the received signal, and for generating a projected error signal according to the projection vector and the error signal;
- and
- a coefficient computing unit, electrically connected to the projecting unit and the weighted signal generator, for adjusting the plurality of equalization coefficients according to the weighted signal, the projected error signal, and the projected received signal.
6 more elements
An adaptive equalizing method comprising:
- generating a reference signal according to a first reference source utilizing a reference signal generator;
- processing a received signal according to a plurality of equalization coefficients to generate an equalized signal utilizing an equalization unit;
- generating a weighted signal according to a second reference source utilizing a weighted signal generator;
- adjusting the plurality of equalization coefficients according to the reference signal, the equalized signal, the weighted signal, and the received signal utilizing a coefficient adapting circuit;
- generating an error signal corresponding to the difference between the equalized signal and the reference signal;
- and
- adjusting the plurality of equalization coefficients according to the weighted signal, the error signal, and the received signal;
- wherein the weighted signal is generated according to level transition of a signal from the second reference source.
5 more elements
An adaptive equalizing method comprising:
- generating a reference signal according to a first reference source utilizing a reference signal generator;
- processing a received signal according to a plurality of equalization coefficients to generate an equalized signal utilizing an equalization unit;
- generating a weighted signal according to a second reference source utilizing a weighted signal generator;
- adjusting the plurality of equalization coefficients according to the reference signal, the equalized signal, the weighted signal, and the received signal utilizing a coefficient adapting circuit;
- generating an error signal corresponding to the difference between the equalized signal and the reference signal;
- generating a projected received signal according to a projection vector and the received signal, and for generating a projected error signal according to the projection vector and the error signal;
- and
- adjusting the plurality of equalization coefficients according to the weighted signal, the projected error signal, and the projected received signal.
5 more elements
Dependencies are inferred from the claim text.