Lsi Corporation

Avago Technologies General IP (singapore) Pte. Ltd.

Enphase Energy, Inc.

Jianzhong Huang

Haitao Xia

Lu Lu

Martin Fornage

Jun Xiao

Xiufeng Song

Kennan Herbert Laudel

Lu Pan, Sr

Seongwook Jeong

Stephen Pope

Fenghua Liu

Fan Zhang

Shaohua Yang

Rui Cao

Bruce Alexander Wilson

Weijun Tan

Ming Jin

Yu Kou

Wu Chang

Xun Zhang

Haotian Zhang

Dahua Qin

Fuminori Sai

Method and apparatus for generating a power line communication (PLC) signal. In one embodiment, the method comprises generating a first modulation signal based on at least one data stream; modulating a first carrier signal by the first modulation signal to generate a first signal; generating a second signal by performing a phase shift based on the first signal; and coupling a balanced three-phase PLC signal comprising the first signal, the second signal and a third signal to a three-phase power line.

Method and apparatus for three-phase power line communications

Method and apparatus for generating a balanced three-phase power line communication signal. In one embodiment, the method comprises generating a plurality of modulation signals based on at least one data stream; modulating a plurality of carrier signals by the plurality of modulation signals to generate a balanced three-phase PLC signal comprising a first phase signal, a second phase signal, and a third phase signal; and coupling the balanced three-phase PLC signal to a three-phase power line.

A data processing system includes an equalizer circuit operable to equalize digital data according to tap coefficients to yield equalized data, a tap coefficient adaptation circuit operable to adapt the tap coefficients based at least in part on a scaled error signal, a data detector operable to apply a data detection algorithm to the digital data to generate hard decisions and soft decisions, an error calculation circuit operable to calculate an error signal based on the equalized data and on the hard decisions, and a scaling circuit operable to scale the error signal based on the soft decisions to yield the scaled error signal.

Soft decision assisted equalizer adaptation

An apparatus for calibrating a noise predictive filter includes a noise-predictive filter operable to filter digital data samples to yield filtered data samples, a calibration circuit operable to calculate tap coefficients for the noise-predictive filter based at least in part on the digital data samples, and a gating circuit operable to select a portion of the digital data samples for use by the calibration circuit in calculating the tap coefficients.

Gated noise-predictive filter calibration

A data processing system includes a binary data detector having a hard decision output, a reliability calculator operable to calculate an error pattern reliability metric for each of a number of dominant error patterns associated with the hard decision output, and a converter operable to convert the error pattern reliability metrics to multi-level soft information.

Systems and methods of converting detector output to multi-level soft information

The present inventions are related to systems and methods for data processing, and more particularly to systems and methods for performing loop feedback in a data processing system.

Systems and methods for loop feedback

A servo system includes a detector circuit operable to apply a data detection algorithm to digital data to yield hard decisions, a convolution circuit operable to yield ideal digital data based on the hard decisions and on target values, a subtraction circuit operable to subtract the ideal digital data from the digital data to yield an error signal, a scaling circuit operable to scale the error signal to yield a scaled noise signal, an adder operable to add the scaled noise signal to the digital data to yield noise-added digital data, and a second detector circuit operable to apply a second data detection algorithm to the noise-added digital data to yield output hard decisions.

Servo system with signal to noise ratio marginalization

A contact detection system includes a comparator operable to compare a signal derived from a contact sensor with a threshold and to indicate contact when the signal is greater than the threshold, a parameter estimation circuit operable to estimate parameters of a probability density function based on the signal derived from the contact sensor, and a threshold calculator operable to calculate the threshold based at least in part on the parameters of the probability density function.

Constant false alarm resonance detector

Systems and methods for data processing, and more particularly systems and methods for loop processing with variance adaptation.

Systems and methods for loop processing with variance adaptation

Systems, methods, devices, circuits for data processing, and more particularly to data processing including adjacent track interference mitigation.

Systems and methods for ATI mitigation

The present invention is related to systems and methods for adaptive parameter modification in a data processing system.

Systems and methods for indirect parameter calibration in a data processing system

Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for data processing with a linear phase noise predictive filter. A data processing system includes an equalizer circuit operable to filter a digital data input to yield equalized data, a linear phase noise predictive finite impulse response filter operable to filter the equalized data to yield filtered data, and a data detector circuit operable to apply a data detection algorithm to the filtered data to yield a detected output. The greatest tap coefficient for the linear phase noise predictive finite impulse response filter is at a center tap.

Systems and methods for processing data with linear phase noise predictive filter

The present inventions are related to systems and methods for determining contact between two elements, and more particularly to systems and methods for determining contact between a head assembly and a storage medium.

Systems and methods for mitigating data interference in a contact signal

A data processing circuit includes a subtraction circuit operable to subtract an ideal version of a data pattern from a sampled version of a data pattern to yield a difference signal, an error calculation circuit operable to calculate an error between the ideal version of the data pattern and the sampled version of the data pattern based on the difference signal, and a comparator circuit operable to compare the error with a threshold value and operable to assert a track refresh signal if the error is greater than the threshold value. The track refresh signal is operable to trigger a magnetic storage device to refresh data on a data track.

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San Jose, CA, United States of America

Jianzhong Huang