Micronas Semiconductors, Inc.

Trident Microsystems (far East) Ltd.

Entropic Communications, Inc.

Jilian Zhu

Shidong Chen

Scott Matthew Lopresto

Richard W Citta

David A Willming

Xiaojun Yang

Gopalan Krishnamurthy

Jingsong Xia

A method of controlling sampling frequency and sampling phase of a sampling device from a value generated by an equalizer coupled to the sampling device includes the steps of generating a complex representation of the value developed by the equalizer and generating a representation of a decision from an output of the equalizer. The complex representation and the decision representation are correlated to obtain a sampling error estimate. The sampling error estimate is used to adjust the sampling frequency and sampling phase of the sampling device.

Apparatus for and method of controlling sampling frequency and sampling phase of a sampling device

A digital receiver for processing a signal received from a channel includes a digital demodulator and an equalizer coupled to the digital demodulator. The equalizer includes a feedforward filter and a decision feedback equalizer (DFE), wherein the feedforward filter includes a plurality of feedforward filter taps. Coefficients are associated with the plurality of feedforward filter taps and the values of all of the coefficients associated with the plurality of feedforward filter taps are dynamically determined.

Advanced digital receiver

A method of controlling a feedforward filter of an equalizer includes the steps of generating a complex representation of an output of the feedforward filter and generating a representation of a decision from an output of the equalizer. The complex representation and the decision representation are correlated to obtain a phase error estimate. A phase correction value is generated based on the phase error estimate and used to adjust the phase of the output of the feedforward filter.

Apparatus for and method of controlling a feedforward filter of an equalizer

A method of controlling a digital demodulator () coupled to an equalizer () includes the steps of generating an equalizer value (A), filtering () the equalizer value (A) to obtain a post filter output, subtracting the equalizer output signal (C) from the decoded data (D) and generating an error value (A). The post filter output is correlated () with the error value (A) to obtain a correlated value (A). A control signal is developed from the correlated value and is used to adjust the digital demodulator ().

Apparatus for and method of controlling a digital demodulator coupled to an equalizer

A DFE comprises a trellis decoder and a plurality of sub-filter pipelines. Each of the plurality of sub-filter pipelines is fed intermediate decoded symbols of one of the stages in a trace-back chain of a current decoding bank. The DFE output is formed by summing the plurality of sub-filter pipelines.

Transposed structure for a decision feedback equalizer combined with a trellis decoder

A digital equalizer for interpreting a digital signal including convolutionally encoded symbols and synchronization symbols outside the convolutional code comprises a combined trellis encoder and DFE. The synchronization symbols are re-inserted into the input of the DFE in order to restore time domain continuity created by removal of the synchronization symbols.

Growing community of inventors

Schaumburg, IL, United States of America

Jilian Zhu