US 9,071,478 B2 · Methods for performing adaptive equalization and associated apparatus

Abstract

A method for performing adaptive equalization includes: dynamically detecting current levels of a plurality of sets of pattern levels respectively corresponding to a plurality of data patterns, wherein each set of the sets of pattern levels includes a previous level, a current level, and a next level respectively corresponding to one of the plurality of data patterns; and dynamically calculating a plurality of data decision levels according to the current levels of the sets of pattern levels, for use of data decision, wherein each data decision level of at least one portion of the plurality of data decision levels is not equal to zero, and the data decision levels are dynamically adjusted in accordance with the current levels of the sets of pattern levels, in order to enhance a signal-to-noise ratio (SNR). An associated method for performing adaptive equalization is also provided. Associated apparatus are also provided.

Claims12

Dependent claims

A method for performing adaptive equalization, the method being applied to a decision feedback equalizer (DFE) data recovery circuit for a linear equalizer, the method comprising:

dynamically detecting current levels of a plurality of data patterns, wherein each data pattern comprises a previous level, a current level, and a next level, by identifying the current level according to the previous level, the current level and the next level, and comparing the current levels with a data decision level determined according to a previous level of the plurality of data patterns;
dynamically setting new data decision levels according to only the detected current levels of the data patterns, for use of data decision, in order to enhance a signal-to-noise ratio (SNR) of data from the DFE data recovery circuit;
for a previous level partial response of the plurality of data patterns, selecting one of the dynamically set new data decision levels;
and
comparing the selected data decision level with the previous level partial response to output a data decision result.

2 more elements

An apparatus for performing adaptive equalization, the apparatus comprising:

a linear equalizer arranged to perform equalization;
an adaptive control circuit arranged to perform adaptive control;
and
a decision feedback equalizer (DFE) data recovery circuit arranged to perform data recovery, wherein under control of the adaptive control circuit, the DFE data recovery circuit dynamically detects current levels of a plurality of data patterns, wherein each data pattern comprises a previous level, a current level, and a next level, by identifying the current level according to the previous level, the current level and the next level, and comparing the current levels with a data decision level determined according to a previous level of the plurality of data patterns, and for a previous level partial response of the plurality of data patterns, selecting a new data decision level and comparing the selected new data decision level with the previous level partial response to output a data decision result;
wherein new data decision levels for use of data decision are dynamically set in accordance with only the detected current levels of the data patterns, in order to enhance a signal-to-noise ratio (SNR) of data from the DFE data recovery circuit.

2 more elements

Dependencies are inferred from the claim text.

Methods for performing adaptive equalization and associated apparatus

Life of this patent

Methods for performing adaptive equalization and associated apparatus

Life of this patent

Abstract

Claims12