Spatial interpolation method and apparatus for linear phased array antenna

Patent metadata

Field	Value
Publication number	US-10215843-B2
Application number	US-201615253870-A
Country	US
Kind code	B2
Filing date	Sep 1, 2016
Priority date	Sep 1, 2015
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

According to an embodiment of the present disclosure, a spatial interpolation method for a linear phased array antenna relates to a spatial interpolation method for a linear phased array antenna including a plurality of transmission antenna elements and a plurality of reception antenna elements and includes Step 1 in which the plurality of reception antenna elements receive a reflected wave reflected from a target, Step 2 in which an incidence angle of the reflected wave incident on the plurality of reception antenna elements is estimated using an angle estimation algorithm, Step 3 in which a bad-conditioned antenna element is selected from among the plurality of reception antenna elements, and Step 4 in which a received signal of the bad-conditioned antenna element is compensated for and the incidence angle of the reflected wave incident on the plurality of reception antenna elements is re-estimated using an angle estimation algorithm.

First claim

What is claimed is:

1. A spatial interpolation method for a linear phased array antenna ( 100 ) including a plurality of transmission antenna elements ( 110 ) and a plurality of reception antenna elements ( 120 ), the spatial interpolation method comprising:
receiving a reflected wave reflected from a target ( 10 ) by the plurality of reception antenna elements ( 120 ) (S 100 );
estimating an incidence angle of the reflected wave incident on the plurality of reception antenna elements ( 120 ) (S 200 );
selecting a bad-conditioned antenna element from among the plurality of reception antenna elements ( 120 ) by using a received signal power of the reflected wave received by each of the plurality of reception antenna elements ( 120 ) (S 300 ); and
compensating for a received signal of the bad-conditioned antenna element by using a received signal of another reception antenna element, and re-estimating the incidence angle of the reflected wave incident on the plurality of reception antenna elements ( 120 ) by reflecting the compensated received signal of the bad-conditioned antenna element thereon (S 400 ).

2. The spatial interpolation method of claim 1 , wherein, in the selecting of the bad-conditioned antenna element (S 300 ), an average of received signal powers of reflected waves received by the plurality of reception antenna elements ( 120 ) is compared with a threshold value, and a reception antenna element in which the average of the received signal powers of the reflected waves is smaller than the threshold value is selected as the bad-conditioned antenna element.

3. The spatial interpolation method of claim 1 , wherein, in the selecting of the bad-conditioned antenna element (S 300 ), peak values of received signal powers of reflected waves received by the plurality of reception antenna elements ( 120 ) are compared with each other, and a reception antenna element having a smallest peak value of the received signal power is selected as the bad-conditioned antenna element.

4. The spatial interpolation method of claim 1 , wherein, in the selecting of the bad-conditioned antenna element (S 300 ), differences between floor levels of peripheral values around a peak value of the received signal power received by the plurality of reception antenna elements ( 120 ) and the peak value are compared with each other, and an antenna element with a smallest difference is selected as the bad-conditioned antenna element.

5. The spatial interpolation method of claim 1 , wherein, in the selecting of the bad-conditioned antenna element (S 300 ), a predetermined reference value is preset, and an antenna element in which a difference between floor levels of peripheral values around a peak value of the received signal power received by the plurality of reception antenna elements ( 120 ) and the peak value is the reference value or less is selected as the bad-conditioned antenna element.

6. The spatial interpolation method of claim 1 , wherein, in the re-estimating of the incidence angle of the reflected wave (S 400 ), the received signal of the bad-conditioned antenna element is compensated for by using a received signal of a reception antenna element adjacent to the bad-conditioned antenna element.

7. The spatial interpolation method of claim 1 , wherein, in the estimating of the incidence angle of the reflected wave (S 200 ) and the re-estimating of the incidence angle of the reflected wave (S 400 ), an angle estimation algorithm is used.

8. The spatial interpolation method of claim 7 , wherein the angle estimation algorithm is a multiple signal classification (MUSIC) algorithm or an estimation of parameters via rotational invariance technique (ESPRIT).

9. A spatial interpolation apparatus for a linear phased array antenna, the spatial interpolation apparatus comprising:
a plurality of reception antenna elements ( 120 ) configured to receive a reflected wave reflected from a target ( 10 );
an incidence angle estimator ( 200 ) configured to estimate an incidence angle of the reflected wave incident on the plurality of reception antenna elements ( 120 );
a detector ( 300 ) configured to select a bad-conditioned antenna element among the plurality of reception antenna elements ( 120 ) by using a received signal power of the reflected wave received by each of the plurality of reception antenna elements ( 120 ); and
a compensator ( 400 ) configured to compensate for a received signal of the bad-conditioned antenna element using a received signal of another reception antenna element,
wherein the incidence angle estimator ( 200 ) re-estimates the incidence angle of the reflected wave incident on the plurality of reception antenna elements ( 120 ) by reflecting the compensated received signal of the bad-conditioned antenna element.

10. The spatial interpolation apparatus of claim 9 , wherein the detector ( 300 ) compares an average of received signal powers of reflected waves received by the plurality of reception antenna elements ( 120 ) with a threshold value and selects a reception antenna element in which the average of the received signal powers of the reflected waves is smaller than the threshold value as the bad-conditioned antenna element.

11. The spatial interpolation apparatus of claim 9 , wherein the detector ( 300 ) compares peak values of received signal powers of reflected waves received by the plurality of reception antenna elements ( 120 ) with each other and selects a reception antenna element having a smallest peak value of the received signal power as the bad-conditioned antenna element.

12. The spatial interpolation apparatus of claim 9 , wherein the detector ( 300 ) compares differences between floor levels of peripheral values around a peak value of the received signal power received by the plurality of reception antenna elements ( 120 ) and the peak value with each other and selects an antenna element with a smallest difference as the bad-conditioned antenna element.

13. The spatial interpolation apparatus of claim 9 , wherein the detector ( 300 ) presets a predetermined reference value and selects an antenna element in which a difference between floor levels of peripheral values around a peak value of the received signal power received by the plurality of reception antenna elements ( 120 ) and the peak value is the reference value or less as the bad-conditioned antenna element.

14. The spatial interpolation apparatus of claim 9 , wherein the compensator ( 400 ) compensates for the received signal of the bad-conditioned antenna element by using a received signal of a reception antenna element adjacent to the bad-conditioned antenna element.

15. The spatial interpolation apparatus of claim 9 , wherein the incidence angle estimator ( 200 ) estimates or re-estimates the incidence angle of the reflected wave incident on the plurality of reception antenna elements ( 120 ) by using an angle estimation algorithm.

16. The spatial interpolation apparatus of claim 15 , wherein the angle estimation algorithm is a multiple signal classification (MUSIC) algorithm or an estimation of parameters via rotational invariance technique (ESPRIT).

Assignees

• Mando Corp
• Seoul Nat Univ R&Db Foundation

Inventors

• Lee Jaeeun
• Jeong Seong Hee
• Lee Seongwook
• Kang Seokhyun
• Shim Heonkyo
• KIM SeongCheol

Classifications

• H01Q3/26 Primary

  varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture ({H01Q3/12,} H01Q3/22, H01Q3/24 take precedence) · CPC title

• G01S13/06

  Systems determining position data of a target · CPC title

• G01S7/4021 Primary

  of receivers · CPC title

• H01Q3/34

  by electrical means (active lenses or reflecting arrays H01Q3/46) · CPC title

• H01Q21/08

  the units being spaced along or adjacent to a rectilinear path {(waveguide fed H01Q21/0037)} · CPC title