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Two-stage time space adaptive processing method for airborne radar time space echo data

A space-time adaptive, airborne radar technology, applied in the field of radar, can solve problems such as insufficient training samples, achieve the effect of rational utilization and improve clutter suppression performance

Active Publication Date: 2016-03-30
XIDIAN UNIV
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Problems solved by technology

[0007] In view of the deficiencies in the prior art above, the purpose of the present invention is to propose a two-stage space-time adaptive processing method for airborne radar space-time echo data, which uses a two-stage space-time adaptive processing structure for clutter suppression , can make more effective and reasonable use of the degrees of freedom of the system, and solve the problem of insufficient training samples during full space-time adaptive processing

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  • Two-stage time space adaptive processing method for airborne radar time space echo data
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  • Two-stage time space adaptive processing method for airborne radar time space echo data

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[0021] refer to figure 1 , a two-stage space-time adaptive processing method of airborne radar space-time echo data of the present invention comprises the following specific steps:

[0022] Step 1, set the antenna array of the airborne radar to uniformly arrange M array elements in the pitch direction, and arrange N array elements uniformly in the azimuth direction, then the number of array elements in the antenna array of the airborne radar is S, S= MN; use the antenna array of the airborne radar to receive the space-time echo data reflected by the ground within the coherent accumulation time, where the space-time echo data matrix received by the kth pulse at the lth distance unit is x k，l :

[0023]

[0024] Among them, k=1, 2,..., K, K is the number of pulses, l=1, 2,..., L, L is the total number of distance units, m=1, 2,... . The number of array elements.

[0025] Step 2, firstly, the space-time echo data matrix x received by the kth pulse at the lth distance unit ...

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Abstract

The invention discloses a two-stage time space adaptive processing method for airborne radar time space echo data, comprising steps of uniformly arranging M array elements and N array elements in a pitching direction and azimuth direction, receiving space time echo data reflected by the ground in a coherent accumulative time, combining the space time echo data array received by k pulses in a first distance unit into a sub-array received in a first distance unit by the k pulses, combining the sub-array received by the k pulses in the first distance unit into a sub-array of the first distance unit, calculating the output data of nth sub-array vector of the first distance unit in k Doppler channels, uniformly dividing N sub-array vectors into P sub-array units in the first distance unit, and performing first stage adaptive processing and second stage adaptive processing on each sub-array unit in the first distance unit to obtain a Doppler spectrum of the first distance unit in kth Doppler channel after second stage clutter is inhibited.

Description

technical field [0001] The invention belongs to the field of radar technology, in particular to a two-stage space-time adaptive processing method for airborne radar space-time echo data, which is used for clutter suppression processing on airborne radar signals. Background technique [0002] With its unique combat characteristics, airborne radar is regarded as a strategic weapon that can influence the situation on the battlefield by the militaries of various countries. The performance of clutter suppression is the main factor that affects whether the airborne radar can look down normally. When the airborne radar is looking down, the impact of ground clutter on the detection performance is very serious. The ground clutter is not only powerful, but also the Doppler spectrum of the clutter is greatly broadened due to the different speeds of ground scatterers in different directions relative to the carrier aircraft, and the clutter shows a strong space-time coupling. Therefore,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/292G01S13/50
CPCG01S7/2928G01S13/50
Inventor 王彤蔡启程张莹莹
Owner XIDIAN UNIV
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