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Onboard MIMO radar post Doppler self-adaptive processing method based on airspace multi-grade decomposition

A post-Doppler and processing method technology, which is applied in the field of airborne MIMO radar post-Doppler adaptive processing, can solve the problem that clutter cannot be effectively suppressed, and achieve the effect of reducing the amount of calculation and sample demand

Active Publication Date: 2017-05-31
NORTHWEST UNIV
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Problems solved by technology

Even so, in the airborne MIMO radar with a large degree of freedom in the airspace, FA and EFA cannot effectively suppress clutter

Method used

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  • Onboard MIMO radar post Doppler self-adaptive processing method based on airspace multi-grade decomposition
  • Onboard MIMO radar post Doppler self-adaptive processing method based on airspace multi-grade decomposition
  • Onboard MIMO radar post Doppler self-adaptive processing method based on airspace multi-grade decomposition

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Embodiment Construction

[0040] According to the above-mentioned technical scheme, the post-Doppler adaptive processing method of the airborne MIMO radar based on the airspace multi-level decomposition of the present invention, the adopted airborne MIMO radar system such as figure 1 As shown, the receiving array is composed of N receiving array elements, and the array element spacing is d r ;The transmitting array is composed of M transmitting elements, and the distance between the elements is d t , and the transmitting element emits orthogonal signals. A total of K pulses are used for coherent accumulation in a coherent processing interval of the transmitting array element, and the pulse repetition frequency is f r . Carrier at speed v a Flight, the angle between the flight direction and the antenna array is θ p .

[0041]Airborne MIMO radar post-Doppler adaptive processing method based on airspace multilevel decomposition of the present invention, see figure 2 , including the following steps:...

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Abstract

The invention discloses an onboard MIMO radar post Doppler self-adaptive processing method based on airspace multi-grade decomposition; the method includes steps of performing a Doppler filtering processing on an onboard MIMO radar echo signal; and then performing the self-adaptive treatment at one or more Doppler channel; decomposing the high-dimensional self-adaptive weight vector, and making it become the Kronecker product of several low-dimensional right vector; through loop iteration, acquiring the weight coefficient; processing the radar echo signal by the weight coefficient, and acquiring the radar echo signal for reducing clutters; the invention can effectively reduce the calculated amount and sample demand of onboard MIMO radar space-time Doppler self-adaptive processing; thus under the condition of improving the small sample condition, the onboard MIMO radar inhibits the clutters and detects the performance of the dynamic goal, and saves precious time and resources.

Description

technical field [0001] The invention belongs to the technical field of airborne radar signal processing, and relates to an airborne MIMO radar post-Doppler adaptive processing method based on airspace multi-level decomposition. Background technique [0002] With the continuous development of MIMO (Multiple-input multiple-output) technology in the field of mobile communication, and at the same time inspired by the synthetic pulse aperture radar, the concept of MIMO radar has been proposed in recent years and has been widely accepted by the military and academic circles at home and abroad. It has become a research hotspot all over the world. Airborne MIMO radar can form a large virtual array aperture with a smaller antenna size without increasing the actual transceiver physical aperture, which overcomes the traditional radar antenna aperture and weight constraints in the context of airborne applications to a certain extent. The disadvantage of the strict limitation of the car...

Claims

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Application Information

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IPC IPC(8): G01S7/41
Inventor 周延聂卫科张万绪冯大政姜博汪霖陈晓璇刘成孟娜
Owner NORTHWEST UNIV
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