公开(公告)号：US12237877B2

公开(公告)日：2025-02-25

申请号：US18490209

申请日：2023-10-19

Applicant: Microsoft Technology Licensing, LLC

Inventor： Vaishnavi Nattar Ranganathan ,  Jonathan Bernard Lester ,  Jingxian Wang ,  Paramvir Bahl

IPC: H04B17/40 ,  G06K17/00 ,  H04B1/00 ,  H04B1/10

Abstract: The devices and methods leverage harmonics to resolve, separate, and identify devices. The devices and methods use the harmonic patterns associated with a frequency modulating (FM) signal to discern and extract information from the FM signal using correlation learning in a crowded spectrum space where the nodes are transmitting simultaneously on multiple channels. The methods and devices leverage harmonics to resolve, separate, and/or identify wireless communication devices.

公开(公告)号：US12284028B2

公开(公告)日：2025-04-22

申请号：US18303124

申请日：2023-04-19

Applicant: Microsoft Technology Licensing, LLC

Inventor： Vaishnavi Nattar Ranganathan ,  Nissanka Arachchige Bodhi Priyantha ,  Mike Nakahara ,  Vikram Subramaniam Iyer ,  Harsh Sandesh Desai

IPC: H04B7/22 ,  H04B1/18 ,  H04B10/114 ,  H04B11/00 ,  H04B13/00

Abstract: Examples are disclosed that relate to improving security of radio frequency (RF) backscattered communication. In one example, a RF device includes a primary RF signal receiver, a secondary signal receiver, a signal mixer, and a transmitter. The primary RF signal receiver is configured to receive a RF carrier signal sent from a base station. The secondary signal receiver is configured to receive a masking signal from the base station. The signal mixer is configured to generate a response signal based at least on the RF carrier signal and generate a mixed signal by mixing the response signal and the masking signal. The transmitter is configured to broadcast the mixed signal, via backscattering, as a masked backscattered signal.

公开(公告)号：US12147932B2

公开(公告)日：2024-11-19

申请号：US17647924

申请日：2022-01-13

Applicant: Microsoft Technology Licensing, LLC

Inventor： Vaishnavi Nattar Ranganathan ,  Upinder Kaur ,  Peeyush Kumar ,  Ranveer Chandra ,  Michael McNab Bassani ,  Vishal Jain

IPC: G06Q10/0833 ,  G06Q30/018

Abstract: A traceability system for a bulk commodity supply chain is provided. The system includes a tracking device, a location determination subsystem, and at least one computing device having at least one processor. The location determination subsystem is configured to determine positional information of the tracking device while placed in a bulk commodity traveling along the bulk commodity supply chain. The processor receives the positional information from the location subsystem, extracts positional values from the positional information, and processes the positional values to identify motion primitives. A modeling tool is applied to the identified motion primitives to produce a positional path of the tracking device, which is output, for example, via a user interface. The positional path represents travel of the bulk commodity along the supply chain.

公开(公告)号：US11848720B2

公开(公告)日：2023-12-19

申请号：US17214737

申请日：2021-03-26

Applicant: Microsoft Technology Licensing, LLC

Inventor： Vaishnavi Nattar Ranganathan ,  Jonathan Bernard Lester ,  Jingxian Wang ,  Paramvir Bahl

IPC: H04B17/40 ,  H04B1/00 ,  H04B1/10 ,  G06K17/00

CPC classification number: H04B17/402 ,  H04B1/0003 ,  H04B1/10 ,  H04B17/406 ,  G06K17/0025

Abstract: The devices and methods leverage harmonics to resolve, separate, and identify devices. The devices and methods use the harmonic patterns associated with a frequency modulating (FM) signal to discern and extract information from the FM signal using correlation learning in a crowded spectrum space where the nodes are transmitting simultaneously on multiple channels. The methods and devices leverage harmonics to resolve, separate, and/or identify wireless communication devices.

公开(公告)号：US10238288B2

公开(公告)日：2019-03-26

申请号：US15624584

申请日：2017-06-15

Applicant: Microsoft Technology Licensing, LLC

Inventor： Sidhant Gupta ,  Jonathan Lester ,  Vaishnavi Nattar Ranganathan

IPC: A61B5/00 ,  H04Q9/00

Abstract: A wearable radio frequency receiver device is provided, which includes a receiver antenna configured to receive an interrogation signal from a transmitter. The receiver device further includes a sensor coupled to the receiver antenna and configured to receive a physiological input from a user wearing the device and generate a sensor signal based on the physiological input, and a modulator configured to perform direct modulation on the received interrogation signal based on the sensor signal to encode the physiological input in the directly modulated interrogation signal. The receiver antenna may be configured to reflect at least a portion of the directly modulated interrogation signal as backscatter radiation. A transceiver including a transceiver antenna may be provided to receive the directly modulated interrogation signal, and the modulation receiver may be configured to process the directly modulated interrogation signal and output a decoded physiological input.