Radar signal sending method and device

1. A radar signal sending method, comprising:

determining, by a first radar detection apparatus, a first time domain range in L time domain ranges, where L is a positive integer greater than 1; and

sending, by the first radar detection apparatus, a first radar signal in the first time domain range, wherein:

any one of the L time domain ranges partially overlaps at least one of the other (L−1) time domain ranges, and an absolute value of a difference between time domain start locations of any two of the L time domain ranges is greater than or equal to a first threshold and less than or equal to a second threshold, the first threshold being determined based on at least one echo delay and at least one propagation delay, the at least one echo delay comprising a first echo delay corresponding to a maximum detection distance of the first radar detection apparatus, and the at least one propagation delay comprising a first propagation delay corresponding to the first radar signal.

2. The method according to claim 1 , wherein the at least one echo delay comprises a second echo delay corresponding to a maximum detection distance of a second radar detection apparatus, the second echo delay not being equal to the first echo delay.

3. The method according to claim 1 , wherein the at least one propagation delay comprises a second propagation delay corresponding to a third radar signal associated with a third radar detection apparatus, and the second propagation delay is not equal to the first propagation delay.

4. The method according to claim 1 , wherein the first threshold is a largest value in a plurality of first sub-thresholds, and the plurality of first sub-thresholds is determined based on the at least one echo delay and the at least one propagation delay.

5. The method according to claim 1 , wherein the second threshold is determined based on the at least one echo delay and the at least one propagation delay.

6. The method according to claim 1 , wherein the second threshold is a smallest value in a plurality of second sub-thresholds, and the plurality of second sub-thresholds is determined based on the at least one echo delay and the at least one propagation delay.

7. The method according to claim 1 , wherein the second threshold is determined based on the at least one echo delay and the at least one propagation delay.

8. The method according to claim 7 , wherein the second threshold is a smallest value in a plurality of second sub-thresholds, and the plurality of second sub-thresholds is determined based on the at least one echo delay and the at least one propagation delay.

9. The radar signal sending method according to claim 1 , further comprising:

receiving another radar signal by the first radar detection apparatus after the propagation delay, wherein:

when power of the other radar signal is greater than a sensitivity of a receiver of the first radar detection apparatus, the other radar signal causes interference to the first radar detection apparatus;

when the power of the other radar signal is not greater than the sensitivity of the receiver of the first radar detection apparatus, the other radar signal does not cause interference to the first radar detection apparatus and the other radar signal is processed as noise; and

when the power of the other radar signal is equal to the sensitivity of the receiver of the first radar detection apparatus, the propagation delay is referred to as maximum propagation delay of radar signal.

10. A detection apparatus, comprising:

one or more processors, and

a non-transitory storage medium coupled to the one or more processors, the non-transitory storage medium storing program instructions that, when executed by the one or more processors, cause the apparatus to:

determine a first time domain range in L time domain ranges, L being a positive integer greater than 1; and

send a first radar signal in the first time domain range, wherein:

any one of the L time domain ranges partially overlaps at least one of the other (L−1) time domain ranges, and an absolute value of a difference between time domain start locations of any two of the L time domain ranges is greater than or equal to a first threshold and less than or equal to a second threshold, the first threshold being determined based on at least one echo delay and at least one propagation delay, the at least one echo delay comprising a first echo delay corresponding to a maximum detection distance of the radar detection apparatus, and the at least one propagation delay comprising a first propagation delay corresponding to the first radar signal.

11. The detection apparatus according to claim 10 , wherein the at least one echo delay comprises a second echo delay corresponding to a maximum detection distance of a second radar detection apparatus, and the second echo delay is not equal to the first echo delay.

12. The detection apparatus according to claim 10 , wherein the at least one propagation delay comprises a second propagation delay corresponding to a third radar signal associated with a third radar detection apparatus, and the second propagation delay is not equal to the first propagation delay.

13. The detection apparatus according to claim 10 , wherein the first threshold is a largest value in a plurality of first sub-thresholds, and the plurality of first sub-thresholds is determined based on the at least one echo delay and the at least one propagation delay.

14. The detection apparatus according to claim 10 , wherein the second threshold is determined based on the at least one echo delay and the at least one propagation delay.

15. The detection apparatus according to claim 10 , wherein the second threshold is a smallest value in a plurality of second sub-thresholds and is determined based on the at least one echo delay and the at least one propagation delay.

16. The detection apparatus according to claim 15 , wherein the second threshold is determined based on the at least one echo delay and the at least one propagation delay.

17. The detection apparatus according to claim 10 , wherein the propagation delay corresponding to the fourth radar signal is a maximum propagation delay corresponding to the fourth radar signal, and the propagation delay corresponding to the fifth radar signal is a maximum propagation delay corresponding to the fifth radar signal.

18. A non-transitory computer readable medium storing program instructions that, when executed by a processor, cause the processor to perform the operations including:

determining a first time domain range range in L time domain ranges, L being a positive integer greater than 1; and

sending a first radar signal in the first time domain range, wherein:

any one of the L time domain ranges partially overlaps at least one of the other (L−1) time domain ranges, an absolute value of a difference between time domain start locations of any two of the L time domain ranges is greater than or equal to a first threshold and less than or equal to a second threshold, the first threshold being determined based on at least one echo delay and at least one propagation delay, the at least one echo delay comprising a first echo delay corresponding to a maximum detection distance of the first radar detection apparatus, the at least one propagation delay comprising a first propagation delay corresponding to the first radar signal.

19. The medium according to claim 18 , wherein the at least one echo delay comprises a second echo delay corresponding to a maximum detection distance of a second radar detection apparatus, and the second echo delay is not equal to the first echo delay.

20. The medium according to claim 18 , wherein the at least one propagation delay comprises a second propagation delay corresponding to a third radar signal associated with a third radar detection apparatus, and the second propagation delay is not equal to the first propagation delay.

21. The medium according to claim 18 , wherein the first threshold is a largest value in a plurality of first sub-thresholds, and the plurality of first sub-thresholds is determined based on the at least one echo delay and the at least one propagation delay.