Simultaneous sensing and backscatter communication using a sensing signal codebook

Abstract

The present invention proposes a system and method that enables wide-area backscatter communication in addition to existing integrated sensing and communication (ISAC) waveforms without introducing Doppler ambiguity, by modifying waveform parameters such as chirp start and stop frequencies between adjacent chirps (or groups of at least n chirps) according to a codebook.

Claims

1. A device for integrated radar sensing and backscatter communication within a wireless network, It transmits a wireless sensing signal, Receiving a wireless return signal from the aforementioned wireless network, The wireless return signals are classified into passive object return signals, backscattered return signals, or backscattered passive object return signals. A device that processes the return signal according to the classification result.

2. The apparatus according to claim 1, which selects a wireless sensing waveform configuration from a codebook and transmits the wireless sensing signal having the waveform according to the selected wireless sensing waveform configuration.

3. The apparatus according to claim 2, which modifies the chirp start frequency and chirp stop frequency between one or more adjacent chirps in accordance with the codebook.

4. The apparatus according to claim 2 or 3, which pre-configures or configures a backscattering device based on the selected wireless sensing waveform configuration or an available wireless sensing waveform configuration.

5. The apparatus according to any one of claims 2 to 4, wherein the wireless sensing waveform configuration is selected based on an external distance estimation technique and information relating to backscattering devices and / or passive objects within the region of interest of the wireless network.

6. The apparatus according to claim 5, which uses the external distance estimation technique to estimate the distance to the furthest backscattering device within the region of interest of the wireless network.

7. A device for backscatter communication in a wireless network, The configuration of the wireless sensing waveform of the integrated sensing and communication system is received or acquired. Based on the received or acquired configuration, the reception of the wireless sensing waveform is determined. A device for backscattering the received wireless sensing waveform.

8. The apparatus according to claim 7, wherein the configuration includes a codebook having active wireless sensing waveforms and corresponding parameters of the integrated sensing and communication system.

9. The reception of the wireless sensing waveform is Measuring at least one parameter of the wireless sensing waveform, and determining, based on the measurement result, whether the wireless sensing waveform corresponds to the received or acquired configuration, and The apparatus according to claim 7 or 8, which determines the identifier encoded in the wireless sensing waveform by comparing it with the corresponding information of the configuration that has been received or acquired.

10. The apparatus according to any one of claims 7 to 9, which modulates the backscattered wireless sensing waveform to match the wireless sensing waveform whose direction has been altered by a passive object.

11. The apparatus according to any one of claims 7 to 10, which modulates the backscattered wireless sensing waveform to include a protected identifier.

12. An access device comprising the apparatus described in any one of claims 1 to 6.

13. A backscattering device comprising the apparatus described in any one of claims 7 to 11.

14. An integrated sensing and communication system comprising one or more access devices according to claim 12 and one or more backscattering devices according to claim 13.

15. A method for integrated radar sensing and backscatter communication in a wireless network, The steps include transmitting a wireless sensing signal, The steps include receiving a wireless return signal from the aforementioned wireless network, The steps include classifying the wireless return signal into a passive object return signal, a backscattered return signal, or a backscattered passive object return signal, The steps of processing the return signal according to the classification result and Methods that include...

16. A method for backscatter communication in a wireless network, The steps include receiving or acquiring the configuration of the wireless sensing waveform of the integrated sensing and communication system, The steps include determining the reception of the wireless sensing waveform based on the received or acquired configuration, The steps include backscattering the received wireless sensing waveform and Methods that include...

17. A computer program that, when executed on a computer device, includes coding means for generating steps of the method according to claim 15 or 16.

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