Marvell International Limited

Nextnav, LLC

Stryker Corporation

Jagadish Venkataraman

Chen Meng

Andrew Sendonaris

Jamal Riani

Norman Franklin Krasner

Kok-Wui Cheong

Ganesh Pattabiraman

Amit A Mahadik

Ramanan Paramasivan

Hannes Rau

Pui Shan Wong

Kundan Krishna

Afshin Jila

Brad Hunter

A surgical system for providing an improved video image of a surgical site including a system controller that receives and processes video images to determine a video signature corresponding to a condition that interferes with a quality of the video images, with the system controller interacting with a video enhancer to enhance the video images from a video capturing device to automatically control the video enhancer to enhance the video images. The surgical system can also review the video images for a trigger event and automatically begin or stop recording of the video images upon occurrence of the trigger event.

Methods and systems to automate surgical interventions

Devices, systems, and methods for improving performance in positioning systems. Performance may be improved using disclosed signal processing methods for separating eigenvalues corresponding to noise and eigenvalues corresponding to one or more direct path signal components or multipath signal components.

Methods and apparatus for improving time of arrival determination

Estimating the position of a receiver using positioning signals and Doppler frequency measurements. Approaches for estimating the position of a receiver using positioning signals and Doppler frequency shift measurements determine an initial estimate of a receiver's position using ranging signals from a first system, generate Doppler frequency shift measurements using the Doppler positioning signals from a second system, and refine the initial estimate using the Doppler frequency shift measurements.

Systems and methods for using doppler measurements to estimate a position of a receiver

Systems and methods for estimating whether a receiver is indoors or outdoors. Certain approaches evaluate data associated with a network of beacons to determine whether the receiver is indoors or outdoors. Such evaluation may include any of determining whether azimuthal angles corresponding to the beacons meet an azimuthal angle condition, determining whether elevation angles corresponding to the beacons meet an elevation angle condition, determining whether signal strengths corresponding to the beacons meet a signal strength condition, and determining whether other measurements associated with the beacons meet other measurement conditions.

Systems and methods for estimating whether a receiver is inside or outside a building

Systems and methods for estimating a position of a receiver within a venue using localized networks of beacons. Certain aspects relate to different configurations of networks. Other aspects relate to estimating the position of the receiver when the receiver approaches an edge of a localized network of beacons.

Systems and methods for estimating a position of a receiver in a network of beacons

Described are systems and methods for estimating a position of a receiver within a venue using localized networks of beacons. Certain aspects relate to different configurations of the networks. Other aspects relate to estimating the position of the receiver when the receiver approaches an edge of a localized network of beacon.

Performance enhancements for local network of beacons

Systems, methods, and other embodiments associated with adaptively determining settings of a transmit equalizer are described. According to one embodiment, a method includes removing, from a signal received from a first device, a signal contribution of a transmit equalizer to produce a residual signal. The method includes generating revised tap coefficients based, at least in part, on the residual signal. The method includes providing settings that are based, at least in part, on the revised tap coefficients to the transmit equalizer in the transmitter of a second device that is across a channel on which the signal is provided.

Method and apparatus for adaptively determining settings of a transmit equalizer

A method and apparatus for receiving data in high-speed applications wherein an analog-to-digital converter (ADC) samples a received signal and a data decoder implemented with a tree search algorithm detects the bits of the sampled data for timing recovery. In some embodiments, a Viterbi detector is implemented to provide accurate bit detection for data output while tree search detected data is used to determine the optimal sampling phase for the ADC. In some embodiments, after the phase acquisition stage of timing recovery has completed, the tree search decoder may decrease the rate of data detection to maintain phase tracking.

Method and apparatus for data reception in high-speed applications

Systems, methods, and other embodiments associated with echo cancellation are described. According to one embodiment, a method includes generating, in a communication device, an address to a look-up table by using a first signal and a second signal. The look-up table is a two-dimensional look-up table configured to store a plurality of cancellation values arranged in a two-dimensional grid. The method also includes producing, in the communication device, a cancellation signal according to a cancellation value in the look-up table that corresponds to the address.

Method and apparatus for reducing nonlinear echo distortion in a communication device

Apparatuses, methods, and other embodiments associated with adaptively determining equalizer setting for 10GBASE-KR transmitter are described. According to one embodiment, an apparatus for tuning an equalizer configured to undo the effects of a channel connecting a transmitter communicating to a receiver via a backplane includes a tuning logic configured to adaptively determine equalizer settings for the equalizer. The tuning logic includes a symmetric search logic configured to determine a desired boost setting for the equalizer, and an asymmetric search logic configured to determine a desired phase response for the equalizer.

Method and apparatus for adaptively determining equalizer settings for 10GBASE-KR transmitter

Systems, methods, and other embodiments associated with adaptively determining settings of a transmit equalizer are described. According to one embodiment, a signal is received from a transmitter and a signal contribution of the transmit equalizer is removed from the signal to produce a residual signal. Revised tap coefficients are computed based, at least in part, on the residual signal. Revised tap coefficient settings, that are based, at least in part, on the revised tap coefficients, are provided to the transmit equalizer.

In a method for detecting symbols in a signal received via a communication channel, the signal including a plurality of signal points, each signal point in the plurality of signal points is processed using a decision feedback equalizer (DFE) to produce a DFE decision. Reliability of the DFE decision is assessed to determine whether the DFE decision is at least one of i) reliable or ii) not reliable. When it is determined that the DFE decision is not reliable, a block of signal points of the plurality of signal points is processed using a Viterbi Detector (VD) to generate a block of VD decisions. The block of VD decisions is selected to be used in place of a block of DFE decisions.

Method and apparatus for detecting modulation symbols in a communication system

Systems, methods, and other embodiments associated with echo cancellation are described. According to one embodiment, a method uses two signals from a transmitter as input to a look-up table to generate a non-linear echo cancellation signal. The non-linear echo cancellation signal is applied to a receiving path to reduce non-linear echo distortion on the receiving path based at least in part on the current signal and the previous signal.

A method of compensating for arbitrary nonlinearities associated with a received signal includes receiving a plurality of samples of the signal having at least one in-band region and at least one out-of-band region, generating a plurality of compensated signal values based on the plurality of samples and a plurality of respective compensation values, applying a transform function to the plurality of compensated signal values to generate a frequency-domain representation of the plurality of compensated signal values, and updating at least one of the plurality of compensation values using the generated frequency-domain representation of the signal to reduce energy associated with the at least one out-of-band region of the signal.

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San Jose, CA, United States of America

Jagadish Venkataraman