Cypress Semiconductor Corporation

Broadcom Corporation

Walter James Wihardja

Victor Simileysky

David Garrett

Jes Thyssen

Juin-Hwey Chen

Victor Zhodzishsky

Evan S McCarthy

Thomas Francis Baker

Thaiyalan Appadurai

Arvind Sridharan

Patrick Coupe

Mohan Mysore

James Skov

Kiran Uln

Tessa Ronan

A wireless system includes a first device in operative communication with an master device over a first link, and a second device to eavesdrop transmissions from the master device to the first device. The wireless system, based on a reference clock signal, adjusts at least one of a first clock signal for the first link and a second clock signal for a second link between the second device and the first device.

Dual advanced audio distribution profile (A2DP) sink

Wireless communication schemes and techniques are described, wherein a secondary device is configured to eavesdrop information communicated between a source and a primary device. Secondary device transmits a NACK signal to jam ACK signals from the primary device to the audio source, forcing a retransmit of audio information from the source to the primary, and available over an eavesdropping link between the secondary device and the source.

In an example embodiment, a device comprises one or more processors and a baseband controller. The one or more processors are configured to: determine, from a payload of at least one received packet, a channel identification (ID) of a notice window in a sequence of transmission windows; transmit, in the notice window, a notice packet that identifies a target window, the target window being later in the sequence of transmission windows than the notice window; generate a target packet that includes inverse whitened data; and transmit the target packet in the target window. The baseband controller is configured to execute signal whitening on the target packet, where the signal whitening of the inverse whitened data in the target packet results in a substantially sinusoidal signal when the target packet is transmitted by the device.

Methods, systems and devices for communicating between devices within a channel hopping system

A passive entry, passive start (PEPS) application is described, wherein a number of sensors are configured with wireless communication protocol information for wireless communication between a master device and a BLE hub. The sensors eavesdrop signals from the master device to the BLE hub while not in operative communication with the master device. Eavesdropped signals are processed to determine and calculate position-related information, such as phase and magnitude of the wireless signals received at multiple antennas of the sensors, angle-of-arrival (AoA), and distance or position of the master device relative to the sensors, individually or as a system. Power management techniques for a PEPS system are also described.

Power management and data bandwidth improvements for passive entry, passive start (PEPS)

A method can include, by operation of a first device, generating sequence information for a plurality of sequential transmission windows, the sequence information including at least a channel identification (ID) corresponding to a base frequency for each window; generating payload data for a packet and wirelessly transmitting the packet in one of the windows, the payload data including sequence information for a window later in the sequence than the window in which the packet is transmitted. By operation of an application executed on a second device, a target packet can be composed that includes inverse whitened data; wherein the whitening of the inverse whitened data by the second device results in a substantially sinusoidal signal when the target packet is transmitted. The first device can determine a direction of the second device by processing the substantially sinusoidal signal. Devices for executing such a method are also disclosed.

Systems and methods are described for enhancing the audio quality of an FM receiver. In embodiments described herein, a stop band noise signal is extracted from an L+R or L&#x2212;R signal produced by an FM stereo decoder. A channel quality measure is calculated based on the stop band noise signal and is used to control whether a pop suppression technique is applied to the L+R signal. The channel quality measure and the stop band noise signal are also leveraged to perform single-channel noise suppression in the frequency domain on the L&#x2212;R signal and on the L+R signal. The channel quality measure is also used to control the application of a fast fading compensation process that replaces noisy segments of the L&#x2212;R and L+R signal with replacement waveforms generated via waveform extrapolation.

Systems and methods for enhancing audio quality of FM receivers

Systems and methods are described for enhancing the audio quality of an FM receiver. In embodiments described herein, quadrature L&#x2212;R demodulation is applied to a composite baseband signal output by an FM demodulator to obtain an L&#x2212;R noise signal. A channel quality measure is calculated based on the L&#x2212;R noise signal and is used to control whether a pop suppression technique is applied to an L+R signal obtained from the composite baseband signal to detect and remove noise pulses therefrom. The channel quality measure and the L&#x2212;R noise signal are also leveraged to perform single-channel noise suppression in the frequency domain on an L&#x2212;R signal obtained from the composite baseband signal and on the L+R signal. The channel quality measure is also used to control the application of a fast fading compensation process that replaces noisy segments of the L&#x2212;R and L+R signal with replacement waveforms generated via waveform extrapolation.

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Tustin, CA, United States of America

Walter James Wihardja