Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Conformal array radar amplitude-phase error correction fast achieving method

A conformal array, amplitude and phase error technology, applied in the field of phased array radar, can solve the problems of difficult application of conformal array radar, huge amount of calculation, difficult to complete in real time and quickly, and achieve flexible and diverse implementation methods, low calculation amount, easy to get effect

Inactive Publication Date: 2013-11-06
XIDIAN UNIV
View PDF5 Cites 41 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the MUSIC algorithm needs to be used for DOA estimation, and its computational complexity is mainly reflected in the eigenvalue decomposition and spectral peak search. The computational complexity of the two operations is O[15(N-1) respectively. 3 ] and O[K(N 2 +N)], where N and K are the number of array elements and the number of search points, respectively. When using a 3D conformal array with a large number of array elements, it is necessary to perform a two-dimensional spectral peak search to obtain DOA estimation. If the azimuth search range is 0° to 180°, the search range of the pitch angle is 0° to 90°, and the search step size is 0.1°, the number of search points K can reach the order of millions, which makes the calculation amount of this method huge, and it is difficult to complete it quickly in real time. This method is difficult to apply to conformal array radar

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
  • Conformal array radar amplitude-phase error correction fast achieving method
  • Conformal array radar amplitude-phase error correction fast achieving method
  • Conformal array radar amplitude-phase error correction fast achieving method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The present invention is a method for quickly realizing amplitude and phase error correction of a conformal array radar. The conformal array radar performs space sampling on the radar echo signal through the antenna array elements, and each antenna array element receiver and the analog / digital converter analyze the radar echo signal. After the signal is processed and sampled, the obtained data is transmitted to the signal processor of the array radar. Ideally, each antenna element system is required to have a consistent amplitude and phase response to the radar echo signal. There are inevitable errors in the receiver sub-equipment or analog / digital converter of the antenna array element, which leads to the inconsistency of the amplitude and phase response of each antenna element to the radar echo signal, and then makes the difference between the actual received data and the ideal received data of the array radar system There is a deviation, so that the follow-up processi...

Embodiment 2

[0059] The method for quickly realizing the amplitude and phase error correction of the conformal array radar is the same as that in Embodiment 1.

[0060] refer to figure 1 , the specific implementation steps in this example are as follows:

[0061] Step 1. Set up a virtual array on the coordinate system of the original conformal array radar system, and use the virtual array to perform interpolation transformation on the original conformal array radar. The virtual array is usually composed of several equidistant linear arrays or equidistant area arrays. The design of the virtual array should be similar in structure to the original conformal array. In this example, the conformal array radar system adopts figure 2 The hemispherical conformal array structure shown is composed of array elements at the origin and four evenly distributed circular arrays. Equal arc distribution, the radius of the bottom surface of the hemisphere is 2λ, λ is the wavelength, λ=0.3m, in this example...

Embodiment 3

[0091] The method for quickly realizing the amplitude and phase error correction of the conformal array radar is the same as that in Embodiment 1-2.

[0092] Effect of the present invention can be illustrated by following simulation experiments:

[0093] Simulation conditions

[0094] The conformal array radar system in this example uses figure 2 The hemispherical conformal array structure shown is composed of array elements at the origin and four evenly distributed circular arrays. Equal arc distribution, the radius of the hemisphere bottom is 2λ, λ=0.3m, in this example image 3 The virtual cross array of the structure shown interpolates the hemispherical conformal array. The virtual cross array consists of 21 array elements. Except for the array element at the origin of the coordinates, the other array elements are evenly distributed on the +X axis, -X axis, On the +Y axis, -Y axis, and +Z axis, the number of array elements in each axis is 4, and the distance between th...

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 discloses a conformal array radar amplitude-phase error correction fast achieving method which mainly solves the problem in the prior art that the existing method is large in calculation amount and can not finish correction in real time fast. The achieving method includes arranging a virtual array, and calculating an ideal transformation matrix; obtaining conformal array radar receiving data; iteration initializing; correcting the transformation matrix; achieving direction of arrival (DOA) estimation on the virtual array; obtaining original conformal array radar amplitude-phase error parameters; judging whether iteration is converged; finishing conformal array radar amplitude-phase error correction. Iteration initial values are selected appropriately, DOA estimation is achieved fast by means of the virtual array, iteration is conducted between original conformal array radar amplitude-phase error parameters and the DOA estimation till iteration is converged, and the defects in the prior art that operation amount is large and correction can not be finished fast in real time due to the fact that a spectrum peak is used for searching and estimating information source orientation are overcome. The method is small in operation amount, easy to achieve, flexible and various in achievement mode and is applied to conformal array radar real-time amplitude-phase error correction.

Description

technical field [0001] The invention belongs to the technical field of phased array radar and relates to array error correction, in particular to a fast implementation method for conformal array radar amplitude and phase error correction. It is applied to the amplitude and phase error correction of conformal array radar. Background technique [0002] On the surface of aircraft or other mobile platform carriers, it is often necessary to install conformal array antennas. Compared with conventional uniform linear arrays, conformal arrays have superior structural characteristics and good direction-finding performance, such as their influence on the aerodynamic performance of radar carriers. It is very small, and has the advantages of small size, light weight, and easy installation. The advantage of conformal array makes it have a wide application prospect in radar. In addition, Direction of Arrival (DOA) estimation is widely used in radar and other fields. The high resolution ...

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
IPC IPC(8): G01S7/40
Inventor 杨志伟张学敬廖桂生孙冬暖纪文静曾操
Owner XIDIAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com