Locating objects in indoor spaces using radio frequency backscatter tags

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11971473
APP PUB NO 20210231792A1
SERIAL NO

17157194

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Importance

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Abstract

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A product locating system is provided. The system includes at least one Radio Frequency (RF) backscatter transmitter configured to emit a main carrier RF signal that forms an excitation signal. The system further includes a passive RF backscatter tag associated with a product and configured to generate an Ultra-Wideband (UWB) signal from the excitation signal. The system also includes at least one RF backscatter receiver configured to simultaneously receive both the excitation signal from the at least one RF backscatter transmitter and the UWB signal from the passive RF backscatter tag, and compute the time-difference-of-arrival (TDoA) therebetween. TDoA information from multiple RF backscatter receivers, including the at least one RF backscatter receiver, is aggregated to compute the location of the product to which the passive RF backscatter tag is attached.

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Patent Owner(s)

  • NEC CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Rangarajan, Sampath Bridgewater, US 238 5415
Sundaresan, Karthikeyan Manalapan, US 89 1067

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