Amazon Technologies, Inc.

Amit Kachroo

Ravi Ichapurapu

Durga Laxmi Narayana Swamy Inti

Morris Yuanhsiang Hsu

Koushik Araseethota Manjunatha

Raghunandan M Rao

A device comprises a display and a plurality of radars. For example, the radars may be arranged around a perimeter of the device, with their respective fields of view directed toward the display. Output from the radar is processed to generate input frames. The input frames are then processed to determine touch data indicative of a position with respect to the display. The input frames may be processed to determine the touch data using a trained machine learning module or a geometric estimation module. For example, the trained machine learning module may accept input frames comprising one or more of range fast-Fourier transform (FFT) data or doppler FFT data and provide as output the touch data.

System for touch interaction with non-touchscreen display

Technologies directed to channel state information (CSI) sending in the 2.4 GHz band are described. A method includes receiving first CSI data representing channel properties of a first wireless channel used by first and wireless devices that operates in the 2.4 GHz band. The method receives second and third CSI data corresponding to second and third wireless channels. The method determines an inference probability of a motion or a non-motion condition in the geographical region based on an average probability of CSI samples from the first, second, and third CSI data.

Channel state information (CSI) sensing in the 2.4 GHz band

Technologies directed to channel state information (CSI) sending in the 2.4 GHz band are described. A method includes receiving first CSI data representing channel properties of a wireless channel used by first and wireless devices that operates in the 2.4 GHz band. The method generates CSI samples at a first sampling rate. If the method determines that a first value, representing quality of the CSI samples, satisfies a threshold criterion, the method generates second CIS samples at a second higher sampling rate while alternating between each of multiple wireless channels in the specified amount of time. The method determines a score for each channel subcarrier index of a set of channel subcarrier indexes using the second CSI samples and identifies a subset based on the score. Using the second CSI samples corresponding to the subset, the method determines a motion condition or a no-motion condition within a geographical region.

Technologies directed to dynamic memory reallocation and offload channel state information (CSI) processing for device power savings are described. A method includes receiving, by a radio, first data from a processing device. The first data is sent to a second wireless device over a wireless channel. The method measures, by the radio, first CSI values that represent channel properties of the wireless channel. The method sends, by the radio, the first CSI values to the processing device with a first periodicity. The method receives, by the radio from the processing device, second data that specifies a transfer interval and an amount of memory to reserve in a memory buffer for second CSI values measured during the transfer interval. The method measures, by the radio, the second CSI values and sends the second CSI values to the processing device at the end of the transfer interval.

Growing community of inventors

San Jose, CA, United States of America

Amit Kachroo