Method and apparatus for detecting object using radar of vehicle

1. A method of detecting an object using a radar, comprising:

propagating a transmission signal generated based on a code sequence;

receiving an echo signal;

detecting an object based on a correlation between the code sequence and the echo signal;

determining whether the object is detected by an interference signal based on an intensity of the echo signal and a distance from the object, wherein the determining of whether the object is detected by the interference signal comprises:

determining the intensity of the echo signal; and

determining that the object is detected by the interference signal, in response to the intensity of the echo signal being greater than a threshold set based on the distance from the object; and

changing the code sequence in response to the object being detected by the interference signal.

2. The method of claim 1 , wherein the transmission signal corresponds to a phase modulated continuous waveform (PMCW).

3. The method of claim 1 , wherein the transmission signal corresponds to a frequency modulated continuous waveform (FMCW).

4. The method of claim 2 , wherein the code sequence is determined based on any one or any combination of an autocorrelation and a cross-correlation.

5. The method of claim 1 , wherein the detecting of the object comprises:

generating a digital echo signal by converting the echo signal into a digital signal.

6. The method of claim 5 , wherein the detecting of the object comprises:

generating cumulative signals by accumulating digital echo signals for each chip period of the code sequence; and

detecting the object based on a respective correlation between the code sequence and each of the cumulative signals.

7. The method of claim 6 , wherein the detecting of the object based on the correlation comprises:

calculating the respective correlation between the code sequence and each of the cumulative signals; and

detecting the object by detecting an effective signal from the cumulative signals based on the calculated respective correlation.

8. The method of claim 7 , wherein the detecting of the effective signal comprises detecting the effective signal corresponding to a correlation greater than or equal to a threshold.

9. The method of claim 7 , wherein the detecting of the object further comprises:

calculating the distance from the object based on a delay time of the effective signal.

10. The method of claim 7 , wherein the calculating of the object further comprises:

calculating a speed of the object based on the distance from the object.

11. The method of claim 1 , wherein the changing of the code sequence comprises:

generating a random number; and

determining a target code sequence from candidate code sequences based on the random number.

12. The method of claim 1 , wherein the receiving of the echo signal comprises receiving the echo signal after a period of time has elapsed from a time of the propagating of the transmission signal.

13. A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the method of claim 1 .

14. An apparatus for detecting an object using a radar, the apparatus comprising:

a processor configured to:

propagate a transmission signal generated based on a code sequence;

receive an echo signal;

detect an object based on a correlation between the code sequence and the echo signal;

determine whether the object is detected by an interference signal based on an intensity of the echo signal and a distance from the object, wherein the processor is further configured to:

determine the intensity of the echo signal; and

determine that the object is detected by the interference signal, in response to the intensity of the echo signal being greater than a threshold set based on the distance from the object; and

change the code sequence in response to the object being detected by the interference signal.

15. The apparatus of claim 14 , wherein the transmission signal corresponds to a phase modulated continuous waveform (PMCW).

16. The apparatus of claim 15 , wherein the code sequence is determined based on any one or any combination of an autocorrelation and a cross-correlation.

17. The apparatus of claim 14 , wherein the processor is further configured to:

generate a digital echo signal by converting the echo signal into a digital signal.

18. The apparatus of claim 17 , wherein the processor is further configured to:

generate cumulative signals by accumulating digital echo signals for each chip period of the code sequence; and

detect the object based on a respective correlation between the code sequence and each of the cumulative signals.

19. The apparatus of claim 18 , wherein the processor is further configured to:

calculate the respective correlation between the code sequence and each of the cumulative signals; and

detect the object by detecting an effective signal from the cumulative signals based on the calculated respective correlation.

20. The apparatus of claim 19 , wherein the processor is further configured to:

calculate the distance from the object based on a delay time of the effective signal.

21. The apparatus of claim 14 , wherein the processor is further configured to:

generate a random number; and

determine a target code sequence from candidate code sequences based on the random number.

22. The apparatus of claim 14 , further comprising a memory configured to store a program executed by the processor.

23. A method of detecting an object using a radar, comprising:

propagating a transmission signal generated based on a code sequence;

determining an intensity of an echo signal, received at a receiver of the radar;

detecting an object based on a correlation between the code sequence and the echo signal;

determining that the object is detected by an interference signal, in response to an intensity of the echo signal being determined to be greater than a threshold based on a distance of the object from the receiver; and

changing the code sequence in response to the object being detected by the interference signal.