CN-122003840-A - Method for determining Doppler frequency shift, receiving end equipment, first object and system

Abstract

The disclosure provides a method for determining Doppler frequency shift, receiving end equipment, a first object and a system, wherein the method comprises the steps of measuring and obtaining a total Doppler frequency offset value based on a sensing reference signal reflected by the first object, calculating a first Doppler frequency offset value, and determining a second Doppler frequency offset value based on the total Doppler frequency offset value and the first Doppler frequency offset value, wherein the first object is an object needing to be sensed, and the second Doppler frequency offset value is a Doppler frequency offset value caused by movement of the first object. The method and the device can accurately determine the Doppler shift value caused by the movement of the first object in the satellite communication system, improve the accuracy of sensing the first object and improve the usability and reliability of an ISAC technology.

Inventors

• ZHAO WENSU

Assignees

• 北京小米移动软件有限公司

Dates

Publication Date

20260508

Application Date

20240904

Claims (20)

1. A method of determining doppler shift, the method performed by a receiving end device of a perceived reference signal, the method comprising: Measuring and obtaining a total Doppler frequency offset value based on a sensing reference signal reflected by a first object, wherein the first object is an object to be sensed; Calculating a first Doppler frequency offset value, wherein the first Doppler frequency offset value is a Doppler frequency offset value caused by satellite movement; And determining a second Doppler frequency offset value based on the total Doppler frequency offset value and the first Doppler frequency offset value, wherein the second Doppler frequency offset value is the Doppler frequency offset value caused by the movement of the first object.
2. The method of claim 1, wherein the calculating the first doppler frequency bias value comprises: Determining a first value, wherein the first value is a Doppler frequency offset value generated by a first frequency relative to a first carrier frequency, the first frequency is a signal frequency when the first object receives the sensing reference signal, and the first carrier frequency is a carrier frequency when a transmitting end device of the sensing reference signal transmits the sensing reference signal; Determining a second value, wherein the second value is a Doppler frequency offset value generated by a second frequency relative to the first frequency, and the second frequency is a signal frequency when the receiving end equipment receives the sensing reference signal reflected by the first object; the first Doppler frequency offset value is calculated based on the first value and the second value.
3. The method of claim 2, wherein the determining the first value comprises any one of: receiving the first value sent by the first object; The first value is calculated.
4. A method according to claim 3, wherein said calculating said first value comprises any one of: the sender device is not a satellite, and the first value is 0; the transmitting end equipment is a satellite, and calculates the first value based on first information; Wherein the first information includes at least one of: A first speed value of the movement of the transmitting end equipment; A transmission speed value of the electromagnetic wave; an earth radius; The height value of the sending end equipment; The first angle value is an angle value of a connecting line between the transmitting end equipment and the first object relative to a ground plane; the first carrier frequency.
5. The method according to claim 4, wherein the method further comprises: And receiving the first angle value sent by the first object.
6. The method according to claim 4, wherein the method further comprises: The receiving terminal equipment is a satellite and receives first position information sent by the first object, wherein the first position information is the position information of the first object; And calculating the first angle value based on the second position information of the transmitting end equipment and the first position information.
7. The method of claim 6, wherein the method further comprises: the receiving end equipment is a satellite, and the first angle value is set; the first angle value is transmitted to the first object.
8. The method of claim 2, wherein the determining the second value comprises any one of: receiving the second value sent by the first object; The second value is calculated.
9. The method of claim 8, wherein the calculating the second value comprises any one of: the receiving end device is not a satellite, and the second value is 0; the receiving end equipment is a satellite, and calculates the second value based on second information; Wherein the second information includes at least one of: a second speed value of movement of the receiving end device; A transmission speed value of the electromagnetic wave; an earth radius; the height value of the receiving end equipment; the second angle value is the angle value of a connecting line between the receiving end equipment and the first object relative to the ground plane; And the second carrier frequency is the carrier frequency when the first object receives the perception reference signal.
10. The method according to claim 9, wherein the method further comprises: And receiving the second angle value sent by the first object.
11. The method according to claim 9, wherein the method further comprises: The receiving terminal equipment is a satellite and receives first position information sent by the first object, wherein the first position information is the position information of the first object; And calculating the second angle value based on third position information of the receiving end equipment and the first position information.
12. The method of claim 11, wherein the method further comprises: the receiving end equipment is a satellite, and the second angle value is set; the second angle value is transmitted to the first object.
13. A method of determining doppler shift, the method performed by a first object, the first object being an object that needs to be perceived, the method comprising: Calculating a first value and transmitting the first value to a receiving end device of a sensing reference signal, wherein the first value is a Doppler frequency offset value generated by a first frequency relative to a first carrier frequency, the first frequency is a signal frequency when the sensing reference signal is received by the first object, the first carrier frequency is a carrier frequency when a transmitting end device of the sensing reference signal transmits the sensing reference signal, and/or And calculating a second value and transmitting the second value to receiving end equipment of a sensing reference signal, wherein the second value is a Doppler frequency offset value generated by a second frequency relative to a first frequency, the second frequency is a signal frequency when the receiving end equipment of the sensing reference signal receives the sensing reference signal reflected by the first object, and the first frequency is a signal frequency when the first object receives the sensing reference signal.
14. The method of claim 13, wherein calculating the first value comprises any one of: the sender device is not a satellite, and the first value is 0; the transmitting end equipment is a satellite, and calculates the first value based on first information; Wherein the first information includes at least one of: A first speed value of the movement of the transmitting end equipment; A transmission speed value of the electromagnetic wave; an earth radius; The height value of the sending end equipment; The first angle value is an angle value of a connecting line between the transmitting end equipment and the first object relative to a ground plane; the first carrier frequency.
15. The method of claim 14, further comprising any one of: Calculating the first angle value; and receiving the first angle value sent by the receiving end equipment.
16. The method of claim 15, wherein the calculating the first angle value comprises: determining first position information of the first object; determining second position information of the transmitting end equipment; The first angle value is calculated based on the first position information and the second position information.
17. The method according to claim 16, wherein the determining the second location information where the sender device is located includes any one of: The transmitting end equipment is a satellite, and determines the second position information based on ephemeris information; The transmitting end equipment is not a satellite, and receives the second position information sent by the transmitting end equipment.
18. The method according to any one of claims 15-17, further comprising: And sending the first angle value to the receiving end equipment.
19. The method of claim 13, wherein calculating the second value comprises: the receiving end device is not a satellite, and the second value is 0; the receiving end equipment is a satellite, and calculates the second value based on second information; Wherein the second information includes at least one of: a second speed value of movement of the receiving end device; A transmission speed value of the electromagnetic wave; an earth radius; the height value of the receiving end equipment; the second angle value is the angle value of a connecting line between the receiving end equipment and the first object relative to the ground plane; And the second carrier frequency is the carrier frequency when the first object receives the perception reference signal.
20. The method of claim 19, further comprising any one of: Calculating the second angle value; And receiving the second angle value sent by the receiving end equipment.

Description

Method for determining Doppler frequency shift, receiving end equipment, first object and system Technical Field The present disclosure relates to the field of communications, and in particular, to a method, a receiving end device, a first object, and a system for determining a doppler shift. Background The integrated Communication (ISAC) technology of INTEGRATED SENSING AND aims to integrate sensing capability into the design of a Communication system, so that the Communication system can provide sensing as a service for users together with Communication, and the integrated Communication system can be applied to scenes such as unmanned plane detection, intrusion detection, intelligent transportation, intelligent factories and the like. Disclosure of Invention In order to improve availability and reliability of ISAC technology, embodiments of the present disclosure provide a method, a receiving end device, a first object, and a system for determining a doppler shift. According to a first aspect of embodiments of the present disclosure, there is provided a method of determining a doppler shift, the method being performed by a receiving end device perceiving a reference signal, the method comprising: Measuring and obtaining a total Doppler frequency offset value based on a sensing reference signal reflected by a first object, wherein the first object is an object to be sensed; Calculating a first Doppler frequency offset value, wherein the first Doppler frequency offset value is a Doppler frequency offset value caused by satellite movement; And determining a second Doppler frequency offset value based on the total Doppler frequency offset value and the first Doppler frequency offset value, wherein the second Doppler frequency offset value is the Doppler frequency offset value caused by the movement of the first object. According to a second aspect of embodiments of the present disclosure, there is provided a method of determining a doppler shift, the method being performed by a first object, the first object being an object that needs to be perceived, the method comprising: Calculating a first value and transmitting the first value to a receiving end device of a sensing reference signal, wherein the first value is a Doppler frequency offset value generated by a first frequency relative to a first carrier frequency, the first frequency is a signal frequency when the sensing reference signal is received by the first object, the first carrier frequency is a carrier frequency when a transmitting end device of the sensing reference signal transmits the sensing reference signal, and/or And calculating a second value and transmitting the second value to receiving end equipment of a sensing reference signal, wherein the second value is a Doppler frequency offset value generated by a second frequency relative to a first frequency, the second frequency is a signal frequency when the receiving end equipment of the sensing reference signal receives the sensing reference signal reflected by the first object, and the first frequency is a signal frequency when the first object receives the sensing reference signal. According to a third aspect of the embodiments of the present disclosure, there is provided a receiving end apparatus, including: The processing module is configured to measure and obtain a total Doppler frequency offset value based on a sensing reference signal reflected by a first object, wherein the first object is an object to be sensed; the processing module is further configured to calculate a first doppler frequency offset value, wherein the first doppler frequency offset value is a doppler frequency offset value caused by satellite movement; the processing module is further configured to determine a second Doppler frequency offset value based on the total Doppler frequency offset value and the first Doppler frequency offset value, wherein the second Doppler frequency offset value is a Doppler frequency offset value caused by movement of the first object. According to a fourth aspect of embodiments of the present disclosure, there is provided a first object, the first object being an object that needs to be perceived, comprising: The processing module is configured to calculate a first value, wherein the first value is a Doppler frequency offset value generated by a first frequency relative to a first carrier frequency, the first frequency is a signal frequency when the first object receives the sensing reference signal, and the first carrier frequency is a carrier frequency when a transmitting end device of the sensing reference signal transmits the sensing reference signal; a transceiver module configured to transmit the first value to a receiving end device of the sensing reference signal, and/or The processing module is configured to calculate a second value, wherein the second value is a Doppler frequency offset value generated by a second frequency relative to a first frequency, the second frequency