Frequency Domain Synthetic Aperture Radar Imaging Method
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of synthetic aperture radar and imaging method, which is applied in the direction of radio wave reflection/re-radiation, utilization of re-radiation, measurement devices, etc., and can solve problems such as increased processing complexity and limitations, processing model approximation errors, and complex calculation processing , to achieve the effects of saving transposition processing time, simple calculation, and high imaging accuracy
Active Publication Date: 2017-10-27
INST OF ELECTRONICS CHINESE ACAD OF SCI
View PDF2 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
The CS method avoids interpolation operations, but it brings problems such as increased processing steps, multiple transposition storage, and approximate errors in the processing model, which increases the complexity and limitations of processing.
[0006] In the continuous practice process, the application found that in the existing SAR imaging methods, there are problems such as low precision, complex calculation processing, and large amount of calculation.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018] The invention adopts an imaging algorithm with accurate frequency domain and no error, and the error caused by the interpolation operation in the calculation process is controlled by an interpolation error compensation method, so as to reduce calculation complexity, calculation amount and imaging precision.
[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0020] In an exemplary embodiment of the present invention, a frequency domain synthetic aperture radar imaging method is provided. Such as figure 1 As shown, the frequency domain synthetic aperture radar imaging method of this embodiment includes:
[0021] Step A: After down-converting and demodulating the echo signal received by the synthetic aperture radar, the signal s(t a , t r ), perform two-dimension...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention provides a frequency domain synthetic aperture radar imaging method. The method comprises steps: A, after down conversion and demodulation are sequentially carried out on echo signals received by the synthetic aperture radar, a signal s (ta, tr) is obtained through sampling, two-dimensional Fourier transform is carried out on the signal s (ta, tr), and a signal S (fa, fr) is obtained; B, the signal S (fa, fr) and a radar system working reference signal HRF (fa, fr) are multiplied, and a signal S1 (fa, fr) is obtained; C, stolt transform is carried out on the signal S1 (fa, fr) according to a set interpolation algorithm, and a signal S2 (fa, f'r) is obtained, wherein the f'r is a new distance frequency variable; and D, after two-dimensional inverse Fourier transform is carried out on the signal S2 (fa, f'r), the signal and an interpolation error compensation function corresponding to the set interpolation algorithm are multiplied, and a high-precision synthetic aperture radar image sI (ta, tr) is obtained. The method of the invention can meet requirements of reducing the computational complexity, reducing the operation quantity, improving the imaging precision and the like by the frequency synthetic aperture radar imaging.
Description
technical field [0001] The invention relates to the technical field of synthetic aperture radar, in particular to a frequency domain synthetic aperture radar imaging method. Background technique [0002] Synthetic Aperture Radar (SAR) is a microwave imaging remote sensing device that works in active detection mode. SAR is loaded on moving platforms such as aircrafts and satellites. As the platform moves, it transmits detection signals and receives target echo signals. By comprehensively processing a series of received signals, it is equivalent to a large-aperture antenna for transmission and reception. High-resolution target detection is realized by means of the received signal, and this technology is called aperture synthesis technology. [0003] Synthetic aperture radar has long detection distance, wide imaging area and high resolution, and can work around the clock. It has a wide range of applications in resource census, surveying and mapping, marine environmental inves...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more