Future Wei Technologies, Inc.

Amazon Technologies, Inc.

Huawei Technologies Co., Limited

Kofi Anim-Appiah

Hiroshi Takatori

Hang Yan

Jianhua Liu

Bin Zhou

Amir H Fazlollahi

Basak Oyman

Ruosi Liu

A system that coordinates audio output among multiple devices to perform noise cancellation in one room of noise resulting from audio output of another. The system uses information from the source of the audio output along with calibration information to coordinate the noise cancellation, which may involve delaying of audio output by the aggressor device.

Coordinated multi-device noise cancellation

A transmitter in a Digital Subscriber Line (DSL) system includes a rate encoder configured to generate a first set of encoded bits using a set of least significant bits, a trellis shaper configured to generate a second set of encoded bits using a most significant bit and the first set of encoded bits, a first constellation mapper configured to generate a first point described by integer coordinates in a complex plane based on the first set of encoded bits obtained from the rate encoder, a second constellation mapper configured to generate a second point described by integer coordinates in the complex plane after interleaving two bits from the second set of encoded bits obtained from the trellis shaper, and a merger module configured to merge the first point with the second point to generate a symbol. The symbol represents a third point described by integer coordinates in the complex plane.

Trellis shaping on LDPC-coded modulation DMT systems

A system, computer readable medium, and method are provided for training a serial communication link to perform crosstalk cancellation. The method includes the steps of, for each crosstalk channel of one or more crosstalk channels, transmitting a training sequence over a crosstalk channel, estimating a phase offset associated with the crosstalk channel, and selecting a set of symbol response coefficients. The method further includes steps for configuring the serial communication link to perform crosstalk cancellation utilizing the selected set of symbol response coefficients and, for each crosstalk channel, updating the selected set of symbol response coefficients every number of Baud durations corresponding to the crosstalk channel.

Training-based backplane crosstalk cancellation

A transmitter including a noise signal generator and a summing element is provided. The noise signal generator is configured to receive multiple noise settings and output multiple noise signals corresponding to the multiple noise settings. The summing element is configured to receive a transmit data signal and the multiple noise signals, sum one or more of the multiple noise signals with the transmit data signal, and output to a transmit driver configured to generate one of a single-ended and a differential signal based on the sum of the one or more of the multiple noise signals with the transmit data signal.

Transmitter noise injection

A transmitter comprising a noise signal generator, a summing element configured to generate a signal as a sum of an output of the noise signal generator and a transmit data signal, and a transmit driver configured to generate an output signal based on the sum. Also, a method of calibrating a signal-to-noise ratio (SNR) for a transmitter comprising transmitting a first signal comprising a data signal with no noise signal, capturing the first signal, transmitting a second signal comprising a noise signal, wherein both an amplitude and a phase of the noise signal have been adjusted by a gain and phase control element, capturing the second signal, and determining the SNR corresponding to the captured first signal and the captured second signal, wherein the transmitter transmits the second signal using a transmit driver.

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Morgan Hill, CA, United States of America

Kofi Anim-Appiah