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

Multi-input and multi-output fast estimation method for radar receiving and transmitting angles under color-noise environment

A radar transceiver and multi-input technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as impracticality

Inactive Publication Date: 2013-07-24
HARBIN ENG UNIV
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods have special requirements on the number of transmitting array elements and receiving array elements, which is not practical

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
  • Multi-input and multi-output fast estimation method for radar receiving and transmitting angles under color-noise environment
  • Multi-input and multi-output fast estimation method for radar receiving and transmitting angles under color-noise environment
  • Multi-input and multi-output fast estimation method for radar receiving and transmitting angles under color-noise environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0087]The following will describe the present invention in more detail in combination with the implementation flow chart and examples.

[0088] Step 1. The receiving end collects the echo signal of each receiving array element through the A / D sampling module

[0089] Assuming that the bistatic MIMO radar is composed of M transmitting array elements and N receiving array elements, and both the transmitting and receiving arrays are half-wavelength uniform equidistant linear arrays, and all array elements are omnidirectional, d t and d r are the spacing between the transmitting and receiving array elements respectively, then the echo signal x(l,t) of each receiving array element collected by the A / D sampling module at the receiving end can be expressed as

[0090]

[0091] In the formula: and θ are the emission angle and reception angle of the pth target respectively; a(θ)=[1,exp(-j2π(d r / λ)sinθ),...,-j2π(d r / λ)(N-1)sinθ)] T is the receiving steering vector of N×1 dime...

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 a multi-input and multi-output fast estimation method for radar receiving and transmitting angles under color-noise environment. The multi-input and multi-output fast estimation method comprises the following steps of: (1) carrying out matching and filtering on echo signals of all receiving array elements acquired by an A / D sampling module and obtaining received data of a virtual array; (2) carrying out rearrangement on the received data of the virtual array; (3) respectively carrying out subarray division on the received data and a rearranged matrix and meeting the characteristic of constant rotation of a transmitting end and a receiving end; (4) constructing two four-order cumulant matrix pairs; (5) obtaining signal subspaces including the characteristic of constant rotation in transmitting and receiving respectively by characteristic values; (6) estimating the receiving and transmitting angles of a target by utilizing an ESPRIT algorithm; and (7) realizing correct pairing of the receiving and transmitting angles by utilizing a maximum likelihood estimation method. The multi-input and multi-output fast estimation method provided by the invention has the advantages that the influence of Gaussian color noise can be effective inhibited, no special requirement exists for the quantity of transmitted / received array elements, the estimation accuracy is high, and the computation complexity is low, so that the multi-input and multi-output fast estimation method can be used for positioning targets on sea or at low altitude in tracking and guidance.

Description

technical field [0001] The invention relates to a method for estimating the receiving and receiving angles of bistatic MIMO radars. Background technique [0002] Multiple-input multiple-output (MIMO) radar is a new system radar with high detection performance that is proposed by referring to the multiple-input multiple-output technology in the field of communication. Compared with the traditional phased array radar, MIMO radar transmits mutually orthogonal waveforms at the transmitting end, and can form a large virtual array aperture through matched filtering at the receiving end, which improves the spatial resolution of the detection target and also increases the Radar degrees of freedom. At present, MIMO radar is mainly divided into the following two types. One is co-site MIMO radar, that is, single / bistatic MIMO radar. The cross signal is matched at the receiving end to form a very long virtual array. These virtual array elements can form a narrow-band beam with low sid...

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): G01S7/41
Inventor 徐定杰李沫璇王伟王咸鹏宋金阳王志华李强马跃华王金龙
Owner HARBIN ENG 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