Method for detecting target object by using radio signal and related apparatus
A method includes determining a first time domain range, where the first time domain range is one of L time domain ranges, and transmitting a first radio signal in the first time domain range, where 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 positions of any two of the L time domain ranges is not less than a first threshold F, and is less than a time domain length of the first time domain range.
1. A method comprising:
transmitting a first radio signal in a first time domain range of a whole time domain, wherein the first time domain range is one of L time domain ranges,
wherein each one of the L time domain ranges partially overlaps another one of the L time domain ranges, wherein a first absolute value of a first difference between time domain start positions of any two of the L time domain ranges is not less than a first threshold (F) and is less than a first time domain length of a time domain range with a shortest time domain length in the L time domain ranges, wherein F is greater than or equal to a frequency sweep period of the first radio signal, wherein F is an integer multiple of the frequency sweep period, and wherein L is a positive integer greater than 1.
2. The method of claim 1 , wherein a second absolute value of a second difference between a first time domain start position of any one of the L time domain ranges except the first time domain range and a second time domain start position of the first time domain range is a positive integer multiple of F.
3. The method of claim 1 , wherein time domain lengths of the L time domain ranges are an integer multiple of a first the frequency sweep period of the first radio signal.
4. The method of claim 1 , further comprising receiving a second radio signal from a detection apparatus at a time domain position other than the first time domain range.
5. The method of claim 4 , wherein the L time domain ranges further comprise a second time domain range corresponding to the detection apparatus.
6. The method of claim 4 , further comprising receiving a third radio signal in the first time domain range, wherein the third radio signal comprises a reflected signal of the first radio signal.
7. The method of claim 6 , wherein information of a target object is based on the third radio signal and the second radio signal.
8. The method of claim 7 , wherein a phase difference (ΔΦ i ) between two adjacent frequency sweep periods of the second radio signal is based on the second radio signal and the first radio signal, wherein the method further comprises performing interference cancellation on the third radio signal based on ΔΦ i and the second radio signal to obtain an intermediate frequency signal; and determining, and wherein the information is based on the intermediate frequency signal.
9. A first apparatus comprising:
a processor; and
a memory in communication with the processor and configured to store program instructions, wherein, when executed by the processor, the program instructions cause the first apparatus to:
transmit a first radio signal in a first time domain range of a whole time domain, wherein the first time domain range is one of L time domain ranges,
wherein each one of the L time domain ranges partially overlaps another one of the L time domain ranges, wherein a first absolute value of a first difference between time domain start positions of any two of the L time domain ranges is not less than a first threshold (F) and is less than a first time domain length of a time domain range with a shortest time domain length in the L time domain ranges, wherein F is greater than or equal to a frequency sweep period of the first radio signal, wherein F is an integer multiple of the frequency sweep period, and wherein L is a positive integer greater than 1.
10. The first apparatus of claim 9 , wherein a second absolute value of a second difference between a first time domain start position of any one of the L time domain ranges except the first time domain range and a second time domain start position of the first time domain range is a positive integer multiple of F.
11. The first apparatus of claim 9 , wherein second time domain lengths of the L time domain ranges are the same, and wherein each of the second time domain lengths is an integer multiple of a first the frequency sweep period of the first radio signal.
12. The first apparatus of claim 9 , wherein, when executed by the processor, the program instructions further cause the first apparatus to receive a second radio signal from a second apparatus at a time domain position other than the first time domain range.
13. The first apparatus of claim 12 , wherein the L time domain ranges further comprise a second time domain range corresponding to the second apparatus.
14. The first apparatus of claim 12 , wherein, when executed by the processor, the program instructions further cause the first apparatus to receive a third radio signal in the first time domain range, and wherein the third radio signal comprises a reflected signal of the first radio signal.
15. The first apparatus of claim 14 , wherein information of a target object is based on the third radio signal and the second radio signal.
16. The first apparatus of claim 15 , wherein a phase difference (ΔΦ i ) between two adjacent frequency sweep periods of the second radio signal is based on the second radio signal and the first radio signal; signal, wherein, when executed by the processor, the program instructions further cause the first apparatus to determine perform interference cancellation on the third radio signal based on ΔΦ i and the second radio signal to obtain an intermediate frequency signal; and determine, and wherein the information is based on the intermediate frequency signal.
17. A vehicle comprising:
a first detection apparatus comprising:
a transmit antenna configured to transmit a first radio signal in a first time domain range of a whole time domain, wherein the first time domain range is one of L time domain ranges,
wherein each one of the L time domain ranges partially overlaps another one of the L time domain ranges, wherein a first absolute value of a first difference between time domain start positions of any two of the L time domain ranges is not less than a first threshold (F) and is less than a first time domain length of a time domain range with a shortest time domain length in the L time domain ranges, wherein F is greater than or equal to a frequency sweep period of the first radio signal, wherein F is an integer multiple of the frequency sweep period, and wherein L is a positive integer greater than 1.
18. The vehicle of claim 17 , wherein a second absolute value of a second difference between a first time domain start position of any one of the L time domain ranges except the first time domain range and a second time domain start position of the first time domain range is a positive integer multiple of F.
19. The vehicle of claim 17 , wherein time domain lengths of the L time domain ranges are an integer multiple of a first the frequency sweep period of the first radio signal.
20. The vehicle of claim 17 , wherein the first detection apparatus further comprises a receive antenna configured to receive from a second detection apparatus a second radio signal at a time domain position other than the first time domain range.