JPS57137869A - Signal processing device for synthetic aperture radar - Google Patents
Signal processing device for synthetic aperture radarInfo
- Publication number
- JPS57137869A JPS57137869A JP56023926A JP2392681A JPS57137869A JP S57137869 A JPS57137869 A JP S57137869A JP 56023926 A JP56023926 A JP 56023926A JP 2392681 A JP2392681 A JP 2392681A JP S57137869 A JPS57137869 A JP S57137869A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- synthetic aperture
- aperture radar
- spectrums
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
- G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
- G01S13/9004—SAR image acquisition techniques
- G01S13/9011—SAR image acquisition techniques with frequency domain processing of the SAR signals in azimuth
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
PURPOSE:To improve the quality of a reproduced picture by controlling variably division widths of a spectrum dividing filter to overlap output spectrums one another partially in case of the multilook processing the receiving signal of a synthetic aperture radar. CONSTITUTION:Division widths of filters 9a-9d are controlled to divide an output spectrum, which is obtained by multiplying the output spectrum resulting from Fourier conversion of the receiving signal of a synthetic aperture radar in a circuit 1 and a predetermined system function Hn in a circuit 2, equally so as to overlap output spectrums one another partially. These spectrums are subjected to reverse Fourier conversion in a circuit 4 individually, and amplitudes of respective output signals are extracted individually by a detector 5, and output signals are added in a circuit 6 to obtain one reproduced picture W't. Thus, the degradation of the resolution of a reproduced image due to the multilook processing is reduced to generate speckles, thereby improving the quality of pictures.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56023926A JPS57137869A (en) | 1981-02-20 | 1981-02-20 | Signal processing device for synthetic aperture radar |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56023926A JPS57137869A (en) | 1981-02-20 | 1981-02-20 | Signal processing device for synthetic aperture radar |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57137869A true JPS57137869A (en) | 1982-08-25 |
JPH0136078B2 JPH0136078B2 (en) | 1989-07-28 |
Family
ID=12124125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56023926A Granted JPS57137869A (en) | 1981-02-20 | 1981-02-20 | Signal processing device for synthetic aperture radar |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57137869A (en) |
-
1981
- 1981-02-20 JP JP56023926A patent/JPS57137869A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0136078B2 (en) | 1989-07-28 |
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