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Space-time adaptive processing method suitable for MIMO airborne-radar non-stationary clutter suppression

A space-time adaptive, non-stationary clutter technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of inability to effectively suppress non-stationary clutter, inability to obtain the degree of freedom of the pitching system, and achieve real-time detection. , easy to achieve effect

Inactive Publication Date: 2017-12-19
AIR FORCE EARLY WARNING ACADEMY
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Problems solved by technology

Obviously, using this type of MIMO radar cannot obtain the system degree of freedom in the pitch direction, so it cannot effectively suppress non-stationary clutter

Method used

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  • Space-time adaptive processing method suitable for MIMO airborne-radar non-stationary clutter suppression
  • Space-time adaptive processing method suitable for MIMO airborne-radar non-stationary clutter suppression
  • Space-time adaptive processing method suitable for MIMO airborne-radar non-stationary clutter suppression

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Embodiment Construction

[0017] Implement the principle of the present invention as follows: airborne MIMO radar at first transmits orthogonal signal by vertical antenna, and horizontal antenna receives airspace echo data through matched filtering (see figure 2 ), or transmit orthogonal signals through the horizontal antenna, and the vertical antenna receives airspace echo data through matched filtering (see image 3 ); then perform analog-to-digital conversion to digitize the echo data; then perform STAP processing on the received space-time two-dimensional data to complete the effective suppression of clutter; finally perform CFAR processing on the output results to complete the detection of moving targets .

[0018] Assume that the number of vertical transmitting antenna elements of the airborne MIMO radar is M, the number of azimuth receiving antenna elements is N, and K pulses are received within one coherent pulse repetition interval. In the example, M=4, N=6, K=128, and the receiving Antenna ...

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Abstract

The invention discloses a space-time adaptive processing method suitable for MIMO airborne-radar non-stationary clutter suppression. In the method, a MIMO system radar is combined to form a virtual array and an antenna pitching dimension freedom degree, and a non-stationary clutter can be effectively suppressed. An emission antenna and a receiving antenna are arranged vertically so as to form a virtual plane array possessing orientation and a pitching freedom degree, and STAP is used to carry out clutter suppression. The method is characterized in that one uniform linear array which is placed horizontally and one uniform linear array which is placed vertically are used for emitting and receiving signals; each array element of the emission antenna emits an orthogonal signal, each array element of the receiving antenna carries out matching filtering processing, and receiving data after filtering is equivalent to vertical plane array receiving data; a typical STAP method is used to complete clutter suppression; and finally, CFAR detection is performed on processed data. By using the method, advantages of anti-radiation countering, anti-interference and the like of a MIMO system airborne radar are possessed, and effective suppression to the strong short-range non-stationary clutter can be realized. The method can be widely applied to an airborne early warning radar adopting a MIMO system and other phased array airborne PD radars.

Description

technical field [0001] The invention relates to a non-stationary clutter suppression method in the field of airborne MIMO radar, and is especially suitable for airborne early warning radar and other airborne radars adopting pulse Doppler (PD). Background technique [0002] In modern warfare, mastering air supremacy is the key to winning a war, and all-weather, all-weather, ultra-long-range, high-precision airborne radar is the fundamental guarantee for mastering air supremacy. It plays an irreplaceable role for other sensors. Therefore, the development and equipment of a new generation of high-performance airborne radar has been highly concerned by countries all over the world. The multiple-input multiple-output (MIMO) radar is a new system radar developed in recent years. Airborne MIMO radar has excellent anti-anti-radiation, anti-jamming, anti-stealth and low-speed target detection performance. The important trend of the development of new system radar in the future is o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 段克清谢文冲高飞陈辉王永良
Owner AIR FORCE EARLY WARNING ACADEMY
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