Interlaced SAR data sampling method based on DPCMAB technology

A data sampling and interleaved technology, applied in the field of synthetic aperture radar, can solve the problems of small spatial sampling interval and difficult design of data acquisition system

Active Publication Date: 2016-07-20
INST OF ELECTRONICS CHINESE ACAD OF SCI
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, if the separation phase center multi-beam technology is directly used without improvement, the phase center distance will only be determined by the spatial sampling interval. Under the condition of ultra-wide transceiver beams (above 90°), the spatial sampling interval is very small (X-band lower than 0.8cm), which brings difficulties to the design of the data acquisition system

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
  • Interlaced SAR data sampling method based on DPCMAB technology
  • Interlaced SAR data sampling method based on DPCMAB technology
  • Interlaced SAR data sampling method based on DPCMAB technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The present invention provides an interleaved SAR data sampling method based on DPCMAB technology. Under this sampling method, the phase center distance will be determined by the spatial sampling interval and the phase center number, thereby leaving more trade-offs for the data acquisition system design. space.

[0021] 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 combination with specific examples and with reference to the accompanying drawings.

[0022] It should be noted that in the drawings and descriptions, the interleaved sampling scheme in which the number of phase centers N=3 is used for illustration. When the number of channels is different, the interleaved sampling scheme needs to be changed. Figure 4 demonstrates this difference.

[0023] In an exemplary implementation example of the present invention, an interleaved SAR data sampling metho...

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

No PUM Login to View More

Abstract

The invention provides an interlaced SAR data sampling method based on DPCMAB technology. The method comprises the steps that A) different parameters of an interlaced sampling scheme are calculated; B) the interlaced sampling scheme is used to emit single pulse every sampling time interval deltat, receives N echo data corresponding to the pulse, and carries out phase compensation on each echo data; C) multiple groups of data obtained at different sampling time are rearranged and merged to obtain a group of data which is arranged successively in a space of azimuth, and a data set is formed; and D) non-uniform data points in the space of the azimuth are removed from the data set to obtain single-emission single-reception echo data arranged uniformly in the spatial position. According to the invention, the phase center spacing in DPCMAB technology is decided by both the space sampling interval and the amount of phase centers, thus, design of a data obtaining system can be weighed in a wider range.

Description

technical field [0001] The present invention relates to the technical field of synthetic aperture radar, in particular to an interleaved synthetic aperture radar (SAR) data sampling method based on Displaced Phase Center MultiAzimuth Beams (DPCMAB for short) technology. Background technique [0002] Multi-angle synthetic aperture radar is a new type of microwave imaging system in which the imaging system moves linearly with the platform and realizes continuous imaging and observation of multiple scenes at different angles within a large viewing angle range. Through the complementarity of observations from multiple angles, it not only realizes high-resolution imaging of the observation target, but also completes the multi-angle fine feature description of the target. [0003] The acquisition of multi-angle information in a large scene can be realized by sending and receiving an ultra-wide beam. A key problem of this data acquisition method is how to reduce the system’s requir...

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
no application Login to View More
Patent Type & AuthorityApplications(China)
IPC IPC(8): G01S7/292G01S13/90
CPCG01S7/292G01S13/90G01S13/904
Inventor洪文郑保文林赟王建峰申文杰
OwnerINST OF ELECTRONICS CHINESE ACAD OF SCI