Systems, methods, and devices for wireless communication device-based detection of radio frequency identification devices

Patent metadata

Field	Value
Publication number	US-12039397-B2
Application number	US-202217954101-A
Country	US
Kind code	B2
Filing date	Sep 27, 2022
Priority date	Sep 27, 2022
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

Systems, methods, and devices detect radio frequency identification devices. Methods include transmitting a signal from a transmitter of a wireless device compatible with a wireless communications protocol, receiving, using a receiver of the wireless device, an encoded signal from a radio frequency identification (RFID) device, and determining a plurality of data values based, at least in part, on the received encoded signal. Methods further include generating an estimated distance value based, at least in part, on the received encoded signal, the estimated distance value representing an estimate of a distance between the wireless device and the RFID device.

First claim

What is claimed is:

1. A method comprising:
transmitting a signal from a transmitter of a wireless device;
receiving, using a receiver of the wireless device, an encoded signal from a radio frequency identification (RFID) device, the transmitter and receiver being configurable to be compatible with a wireless communications protocol used for data transmission over a wireless network;
removing, using a phase shifter, a parasitic signal from the received modulated signal;
determining a plurality of data values based, at least in part, on the received encoded signal; and
generating an estimated distance value based, at least in part, on the received encoded signal, the estimated distance value representing an estimate of a distance between the wireless device and the RFID device.

2. The method of claim 1 , wherein the RFID device is a passive device.

3. The method of claim 2 , wherein the encoded signal is generated based on backscattering of the signal by the RFID device.

4. The method of claim 1 further comprising:
obtaining a plurality of samples from the received modulated signal; and
performing one or more decoding operations based, at least in part, on the plurality of samples, the one or more decoding operations comprising comparing the received signal with the transmitted signal.

5. The method of claim 4 , wherein the one or more decoding operations decode a bit stream from the encoded signal, and wherein the bit stream comprises an identifier for the RFID device.

6. The method of claim 1 further comprising:
switching the transmitter from a first operational mode to a second operational mode, the first operational mode being used for data transmission in accordance with the wireless communications protocol, and the second operational mode being used for scanning associated with the RFID device.

7. The method of claim 1 , wherein the wireless communications protocol is an institute of electrical and electronics engineers (IEEE) 802.11 protocol.

8. The method of claim 1 , wherein the wireless communications protocol is a Bluetooth Low Energy (BLE) protocol.

9. A system comprising:
a transmitter configured to transmit a signal;
a receiver configured to receive an encoded signal from a radio frequency identification (RFID) device, the transmitter and receiver being configurable to be compatible with a wireless communications protocol used for data transmission over a wireless network; and
a processing device coupled to the transmitter and the receiver and configured to:
determine a plurality of data values based, at least in part, on the received encoded signal;
remove, using a phase shifter, a parasitic signal from the received modulated signal; and
generate an estimated distance value based, at least in part, on the received encoded signal, the estimated distance value representing an estimate of a distance between a wireless device and the RFID device.

10. The system of claim 9 , wherein the RFID device is a passive device, and wherein the encoded signal is generated based on backscattering of the signal by the RFID device.

11. The system of claim 9 , wherein the processing device is further configured to:
obtain a plurality of samples from the received encoded signal; and
perform one or more decoding operations based, at least in part, on the plurality of samples, the one or more decoding operations comprising comparing the received signal with the transmitted signal.

12. The system of claim 11 , wherein the one or more decoding operations decode a bit stream from the encoded signal, and wherein the bit stream comprises an identifier for the RFID device.

13. The system of claim 9 , wherein the wireless communications protocol is an IEEE 802.11 protocol.

14. The system of claim 9 , wherein the wireless communications protocol is a BLE protocol.

15. A device comprising:
processing elements configured to:
generate a signal transmitted from a transmitter of a wireless device;
receive, using a receiver of the wireless device, an encoded signal from a radio frequency identification (RFID) device, the transmitter and receiver being configurable to be compatible with a wireless communications protocol used for data transmission over a wireless network;
remove, using a phase shifter, a parasitic signal from the received modulated signal;
determine a plurality of data values based, at least in part, on the received encoded signal; and
generate an estimated distance value based, at least in part, on the received encoded signal, the estimated distance value representing an estimate of a distance between the wireless device and the RFID device.

16. The device of claim 15 , wherein the RFID device is a passive device, and wherein the encoded signal is generated based on backscattering of the signal by the RFID device.

17. The device of claim 15 , wherein the processing elements are further configured to:
obtain a plurality of samples from the received encoded signal; and
perform one or more decoding operations based, at least in part, on the plurality of samples, the one or more decoding operations comprising comparing the received signal with the transmitted signal.

18. The device of claim 15 , wherein the wireless communications protocol is an IEEE 802.11 protocol.

19. The device of claim 15 , wherein the wireless communications protocol is a BLE protocol.

Assignees

• Cypress Semiconductor Corp

Inventors

• Kolych Igor
• Uln Kiran
• Karpin Oleksandr

Classifications

• G06K7/10366

  the interrogation device being adapted for miscellaneous applications · CPC title

• G06K19/07766 Primary

  comprising at least a second communication arrangement in addition to a first non-contact communication arrangement · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• G06K7/10297 Primary

  arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092 (cryptographic protocols H04L9/00; network security protocols H04L63/00; real-time communication protocols in data switching networks H04L65/00; network protocols for data switching network services H04L67/00) · CPC title