Method for partial combination clutter suppression in airborne MIMO radar three-dimensional beam space

A three-dimensional beam and clutter suppression technology, which is applied to radio wave measurement systems, instruments, etc., can solve problems such as large amount of computation and large demand for samples

Inactive Publication Date: 2014-07-30
XIDIAN UNIV
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Problems solved by technology

[0004] When the existing method is applied to airborne MIMO radar clutter suppression, the present invention proposes a partial joint clutter suppression method in three-dimensional beam space of airborne MIMO radar, which is used to solve the problem of large amount of computation and large sample demand

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  • Method for partial combination clutter suppression in airborne MIMO radar three-dimensional beam space
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  • Method for partial combination clutter suppression in airborne MIMO radar three-dimensional beam space

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[0052] refer to figure 1 and figure 2 , illustrate the partial joint clutter suppression method of a kind of airborne MIMO radar three-dimensional beam space of the present invention, its specific steps are as follows:

[0053] Step 1. Use the airborne MIMO radar antenna to receive space-time data, and construct the space-time two-dimensional steering vector b(f s,0 ,f d,0 );

[0054] 1a) It is set that within a coherent processing interval, the M transmitting elements of the airborne MIMO radar antenna simultaneously radiate a burst waveform composed of K pulses, and the M transmitting waveforms emitted by the M transmitting elements are orthogonal to each other, At each of the N receiving array elements, M reference transmitting signals are used to perform matched filtering on the echo data of K pulse periods, and the outputs of all matched filters are arranged into the following MNK×1-dimensional space-time data Vector, the expression of the space-time data vector x i...

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Abstract

The invention belongs to the technical field of radar signal processing, relates to localized suppression processing of radar clutters and discloses a method for partial combination clutter suppression in airborne MIMO radar three-dimensional beam space. The method comprises the steps that firstly, an expression of a space-time data vector x is obtained and a space-time two-dimensional guide vector of a target is established; secondly, an array element-pulse domain of the space-time data vector x is converted into a three-dimensional beam domain through three-dimensional discrete Fourier transform; thirdly, a space-time data vector z generated after dimensionality reduction and a space-time two-dimensional guide vector, generated after dimensionality reduction, of the target are obtained; fourthly, according to a cost function of dimensionality reduction space-time self-adaptive processing, a weight vector of a dimensionality reduction processor is calculated; fifthly, space-time data processed by clutter suppression are obtained through the weight vector of the dimensionality reduction processor. The method can solve the problems of the large operand and large sample requirements and is applied to the scene of radar clutter processing.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and relates to localized suppression processing of radar clutter, in particular to a partial combined clutter suppression method in three-dimensional beam space of an airborne MIMO radar. Background technique [0002] Since MIMO radar has become the development direction of the next-generation radar, MIMO radar has also become a current research hotspot. MIMO radar uses digital array technology at the transmitter and receiver at the same time, transmits multiple orthogonal or incoherent signals, and uses matched filtering to separate the transmitted signal components at the receiver. MIMO radar can obtain a large The virtual array aperture and system degrees of freedom can greatly improve the radar parameter estimation accuracy, angular resolution and clutter suppression ability. Since MIMO radar adopts digital array technology at both the transmitting end and receiving end, MIMO...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36
CPCG01S7/023G01S7/2923G01S7/42
Inventor 冯大政向平叶吕晖周延解虎肖春宝白登潘
Owner XIDIAN UNIV
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