Radar image generation mehtod and apparatus for performing the same
Disclosed are a radar image generation method and an apparatus for performing the same. The radar image generation method includes receiving a received signal received at each of radars that are distributed and arranged; generating an input signal by processing the received signal; generating a support vector based on the input signal; updating the support vector; updating a coefficient corresponding to the support vector; and generating a radar image based on the support vector and the coefficient.
1. A radar image generation method comprising:
receiving a received signal received at each of radars that are distributed and arranged;
generating an input signal by processing the received signal;
generating a support vector that represents sparsity for sparsity modeling based on the input signal;
updating the support vector;
updating a coefficient corresponding to the support vector; and
generating a radar image based on the support vector and the coefficient,
wherein the generating of the input signal comprises:
generating a first de-ramped signal by de-ramping the received signal;
generating a second de-ramped signal by processing the first de-ramped signal; and
reformulating the second de-ramped signal based on a measurement area,
wherein the updating of the support vector comprises computing a support update matrix for updating the support vector,
wherein the computing of the support update matrix comprises initializing the support vector.
2. The radar image generation method of claim 1 , wherein the measurement area is divided in a two-dimensional (2D) patch form with respect to a distance and an azimuth.
3. The radar image generation method of claim 1 , wherein the coefficient is a total sum of an antenna gain and a pathloss of a radar.
4. The radar image generation method of claim 1 , wherein the updating of the support vector further comprises:
sharing a support vector set that is updated based on the support update matrix.
5. The radar image generation method of claim 4 , wherein the computing of the support update matrix further comprises:
computing the support update matrix by activating a single element of the support vector.
6. The radar image generation method of claim 4 , wherein the sharing of the support vector set comprises:
updating the support vector set based on a total sum of the support update matrix; and
sharing the updated support vector set.
7. The radar image generation method of claim 6 , wherein the updating of the support vector set comprises storing a support vector associated with a maximum value of the total sum in the support vector set.
8. The radar image generation method of claim 1 , wherein the updating of the coefficient comprises:
computing the coefficient based on the updated support vector; and
verifying whether an estimation error is less than a threshold based on the coefficient.
9. A radar image generation apparatus comprising:
a memory configured to store instructions; and
a processor configured to execute the instructions,
wherein, when the instructions are executed by the processor, the processor is configured to receive a received signal received at each of radars that are distributed and arranged, to generate an input signal by processing the received signal, to generate a support vector that represents sparsity for sparsity modeling based on the input signal, to update the support vector, to update a coefficient corresponding to the support vector, and to generate a radar image based on the support vector and the coefficient,
wherein the processor is configured to generate a first de-ramped signal by de-ramping the received signal, to generate a second de-ramped signal by processing the first de-ramped signal, and to reformulate the second de-ramped signal based on a measurement area,
wherein the updating of the support vector comprises computing a support update matrix for updating the support vector,
wherein the computing of the support update matrix comprises initializing the support vector.
10. The radar image generation apparatus of claim 9 , wherein the measurement area is divided in a two-dimensional (2D) patch form with respect to a distance and an azimuth.
11. The radar image generation apparatus of claim 9 , wherein the coefficient is a total sum of an antenna gain and a pathloss of a radar.
12. The radar image generation apparatus of claim 11 , wherein the processor is further configured to share a support vector set that is updated based on the support update matrix.
13. The radar image generation apparatus of claim 12 , wherein the processor is further configured to compute the support update matrix by activating a single element of the support vector.
14. The radar image generation apparatus of claim 12 , wherein the processor is configured to update the support vector set based on a total sum of the support update matrix, and to share the updated support vector set.
15. The radar image generation apparatus of claim 14 , wherein the processor is configured to store a support vector associated with a maximum value of the total sum in the support vector set.
16. The radar image generation apparatus of claim 9 , wherein the processor is configured to compute the coefficient based on the updated support vector, and to verify whether an estimation error is less than a threshold based on the coefficient.
17. A radar system comprising:
a plurality of radars each comprising a plurality of transmit antennas and a plurality of receive antennas; and
a radar image generation apparatus of claim 7 .
18. The radar system of claim 17 , wherein the plurality of radars are provided at distributed positions.