Cornell Research Foundation Inc.

General Electric Company

Koninklijke Philips Corporation N.V.

Cornell University

Lang Tong

Srihari Adireddy

John Anderson Fergus Ross

Scott Charles Evans

Waseem Ibrahim Faidi

Peter Alan Gregg

Colin Craig McCulloch

John David Hilton, Jr

Andrew Ferree

Xinyi Wang

Joshua Benjamin Schoenstedt

Systems and methods herein provide for adaptive subband compression of power signals in a power system. In one embodiment, a system includes an encoder is operable to partition sensor measurements into frequency subbands (e.g., including an interharmonic subband), centered at integer multiples of the power system's fundamental frequency (e.g., 50 Hz or 60 Hz). The encoder may also be operable to detect active subbands, and to compress the at least one active subband. The system also includes a data concentrator operable to transmit the at least one compressed subband to a processor for analysis. The system also includes a decoder at a processing location (a substation, a concentrator, or the control center) operable to parse the compressed waveforms into subbands, to interpolate and decompress at least one compressed subband, and to synthesize the decompressed subbands as an approximation of the original waveform (e.g., subject to reconstruction error requirements).

Adaptive subband compression of streaming data for power system monitoring and control

A control system for use with a plurality of wind turbines includes a processor and a memory device coupled to the processor. The memory device is configured to store a plurality of program modules that, when executed by the processor, configure the processor to receive data representative of a power generation of a first wind turbine of the plurality of wind turbines, and determine an expected power generation of a second wind turbine of the plurality of wind turbines based on the power generation of the first wind turbine.

Control system and method of predicting wind turbine power generation

A network includes a transmitter for transmitting a stream of known symbols and unknown symbols in an optimal distribution through a transmission channel to a receiver that receives the transmitted stream of known symbols and unknown symbols distorted by intersymbol interference (ISI). The receiver uses a known symbol generator and a precursor cancellation decision feedback equalizer (PC-DFE) to cancel precursor ISI from symbols that have not yet been decided. The transmitter comprises a known symbol distribution controller for inserting a plurality of known symbols into an outgoing stream of unknown symbols in an optimum distribution in order to improve the performance of the PC-DFE in the receiver.

Systems and methods for optimal symbol spacing to minimize intersymbol interference in a receiver

There is disclosed a transmitter for transmitting a stream of known symbols and unknown symbols through a transmission channel to a first receiver that receives the transmitted stream of known symbols and unknown symbols distorted by intersymbol interference (ISI) and reduces therein an ISI signal. The transmitter comprises a known symbol distribution controller capable of inserting a plurality of known symbol clusters into an outgoing stream of unknown symbols in an optimum distribution in order to improve the performance of the first receiver.

Systems and methods for optimal distribution of symbols in a fixed size data packet to improve receiver performance

There is disclosed, for use in a receiver receiving from a transmission channel an incoming stream of known symbols and unknown symbols distorted by intersymbol interference (ISI), an apparatus for reducing a precursor ISI signal. The apparatus for reducing the precursor ISI signal comprises: 1) a decision feedback equalizer for receiving the incoming stream of distorted known symbols and distorted unknown symbols and generating a sequence of detected symbols; and 2) a known symbol generator for generating a copy of a first known symbol prior to an estimation of the first known symbol by the decision feedback equalizer, wherein the decision feedback equalizer uses the copy of the first known symbol to reduce a first precursor ISI signal in a second symbol transmitted prior to the first known symbol.

System and methods for precursor cancellation of intersymbol interference in a receiver

An apparatus for reducing a precursor ISI signal in a receiver that receives an incoming stream of symbols distorted by intersymbol interference (ISI) includes: 1) a first forward filter for receiving the incoming stream of distorted symbols and generating a first equalized output signal (Y&prime; ); 2) a first decision feedback equalizer (DFE) stage for receiving the Y&prime; signal and generating a first decided symbol sequence (&Scirc; ), wherein the first DFE stage generates from &Scirc; a first postcursor cancellation signal that reduces postcursor ISI in the Y&prime; signal and generates from the Y&prime; signal a first symbol estimate signal (v ) in which postcursor ISI is at least partially reduced; and 3) a second decision feedback equalizer (DFE) stage for receiving the Y&prime; signal and generating a second decided symbol sequence (&Scirc; ), wherein the second DFE stage comprises a soft symbol estimator that receives the v signal and generates a soft decision sequence (&Scirc;&prime; ) comprising decided symbols and zero output signals, and wherein the second DFE stage generates from &Scirc;&prime; a precursor cancellation signal that reduces precursor ISI in the Y&prime; signal.

Growing community of inventors

Ithaca, NY, United States of America

Lang Tong