Radar signal processing device and method

1. A radar signal processing device comprising:

an interference reference flag configuration unit configured to divide a transmission signal into a plurality of blocks in a preconfigured time units on a time axis, and configure an interference reference flag for one or more specific blocks selected among the plurality of blocks;

an impulsive noise detection unit configured to detect whether an impulsive noise occurs in each of the plurality of blocks, by using a reception signal;

an in-band flag configuration unit configured to configure an in-band flag by using the interference reference flag and a block in which the impulsive noise is detected; and

an interference signal prediction unit configured to predict introduction of an in-band interference signal according to whether the in-band flag exists,

wherein the transmission signal is a frequency modulated continuous wave.

2. The radar signal processing device of claim 1 , wherein the interference reference flag configuration unit is configured to select, as the one or more specific blocks, continuous blocks in each of an up-chirp interval in which a frequency increases along with time based on a maximum frequency of the transmission signal, and a down-chirp interval in which the frequency decreases along with time based on the maximum frequency of the transmission signal.

3. The radar signal processing device of claim 1 , wherein the interference reference flag configuration unit is configured to select the one or more specific blocks based on at least one piece of information among information of a time axis position with respect to a maximum frequency of the transmission signal, information of a maximum reception signal delay time for detecting the reception signal, that is the transmission signal reflected from a target and then received, information of a preconfigured interference signal detection sensitivity, and chirp interval information of the transmission signal.

4. The radar signal processing device of claim 3 , wherein the interference reference flag configuration unit is configured to select, as the one or more specific blocks in a down-chirp interval of the transmission signal, a reference block determined by using the time axis position with respect to the maximum frequency of the transmission signal and N continuous blocks after the reference block, and then configure the interference reference flag, wherein N is a natural number.

5. The radar signal processing device of claim 3 , wherein the interference reference flag configuration unit is configured to select, as the one or more specific blocks in an up-chirp interval of the transmission signal, a reference block determined by using the time axis position with respect to the maximum frequency of the transmission signal and M continuous blocks before the reference block, and then configure the interference reference flag, wherein M is a natural number.

6. The radar signal processing device of claim 3 , wherein the interference reference flag configuration unit is configured to determine the number of the specific blocks for which the interference reference flag is configured, in proportion to the interference signal detection sensitivity.

7. The radar signal processing device of claim 1 , wherein the in-band flag configuration unit is configured to configure the in-band flag for the block in which the impulsive noise is detected when occurrence of the impulsive noise is detected in the specific block for which the interference reference flag is configured.

8. The radar signal processing device of claim 7 , wherein the interference signal prediction unit is configured to determine that the in-band interference signal will be introduced when the block for which the in-band flag is configured is detected.

9. The radar signal processing device of claim 1 , further comprising an interference signal avoidance unit configured to control the transmission signal to be frequency-hopped or time-hopped by applying a hopping parameter when introduction of the in-band interference signal is predicted.

10. The radar signal processing device of claim 9 , wherein the hopping parameter is configured to be determined by a system parameter and a random parameter, and configured to be generated when the in-band flag is configured.

11. The radar signal processing device of claim 10 , wherein the system parameter is configured to be determined to be a preconfigured first value when the block, for which the in-band flag is configured, is positioned in the down-chirp interval of the transmission signal, and configured to be determined to be a preconfigured second value when the block, for which the in-band flag is configured, is positioned in the up-chirp interval of the transmission signal.

12. The radar signal processing device of claim 11 , wherein an absolute value obtained by subtracting the second value from the first value is configured to exceed a value of a maximum reception signal delay time for detecting the reception signal that is the transmission signal reflected from a target and then received.

13. A radar signal processing method comprising:

an interference reference flag configuration step of dividing a transmission signal into a plurality of blocks in preconfigured time units on a time axis, and configuring an interference reference flag for one or more specific blocks selected among the plurality of blocks;

an impulsive noise detection step of detecting whether an impulsive noise occurs in each of the plurality of blocks, by using a reception signal;

an in-band flag configuration step of configuring an in-band flag by using the interference reference flag and a block in which the impulsive noise is detected; and

an interference signal prediction step of predicting introduction of an in-band interference signal according to whether the in-band flag exists, wherein the transmission signal is a frequency modulated continuous wave.

14. The radar signal processing method of claim 13 , further comprising an interference signal avoidance step of controlling the transmission signal to be frequency-hopped or time-hopped by applying a hopping parameter when introduction of the in-band interference signal is predicted.

15. The radar signal processing method of claim 13 , wherein the interference reference flag configuration step comprises selecting the one or more specific blocks based on at least one piece of information among information of a time axis position with respect to a maximum frequency of the transmission signal, information of a maximum reception signal delay time for detecting the reception signal, that is the transmission signal reflected from a target and then received, information of a preconfigured interference signal detection sensitivity, and chirp interval information of the transmission signal.

16. The radar signal processing method of claim 15 , wherein the interference reference flag configuration step comprises selecting, as the one or more specific blocks in a down-chirp interval of the transmission signal, a reference block determined by using the time axis position with respect to the maximum frequency of the transmission signal and N continuous blocks after the reference block, and then configuring the interference reference flag, wherein N is a natural number.

17. The radar signal processing method of claim 15 , wherein the interference reference flag configuration step comprises selecting, as the one or more specific blocks in an up-chirp interval of the transmission signal, a reference block determined by using the time axis position with respect to the maximum frequency of the transmission signal and M continuous blocks before the reference block, and then configuring the interference reference flag, wherein M is a natural number.

18. The radar signal processing method of claim 15 , wherein the interference reference flag configuration step comprises determining the number of the specific blocks for which the interference reference flag is configured, in proportion to the interference signal detection sensitivity.