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Non-adaptive clutter pre-filtering space-time two-dimensional cancellation method for airborne MIMO (Multiple-Input-Multiple-Output) radar

A space-time two-dimensional cancellation, non-adaptive technology, applied in special data processing applications, radio wave measurement systems, radio wave reflection/re-radiation, etc. Improve real-time performance, high computational complexity, and reduce the effect of dependency

Inactive Publication Date: 2015-02-11
XIDIAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, MIMO radar also has obvious shortcomings. Although the high degree of freedom of MIMO radar can effectively suppress clutter, it requires a large number of samples. In space-time adaptive processing, the number of samples is very small. At the same time, this also brings Comes the high computational complexity

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  • Non-adaptive clutter pre-filtering space-time two-dimensional cancellation method for airborne MIMO (Multiple-Input-Multiple-Output) radar

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with accompanying drawing:

[0032] refer to figure 1, is a flow chart of the airborne MIMO radar non-adaptive clutter pre-filtering space-time two-dimensional cancellation method of the present invention. The airborne MIMO radar non-adaptive clutter pre-filtering space-time two-dimensional cancellation method includes the following steps:

[0033] Step 1. Use the transmitting array of the airborne MIMO radar to transmit the signal, and use the receiving array of the airborne MIMO radar to receive the echo signal; express the range unit to be detected of the airborne MIMO radar as the 10th distance unit, and obtain the airborne MIMO The clutter of the range unit to be detected for the kth pulse of the radar The main lobe clutter of the matched filter signal

[0034] The specific steps are:

[0035] The carrier aircraft flies at a constant speed, the carrier aircraft speed is v, and the carrier air...

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Abstract

The invention belongs to the technical field of airborne MIMO (Multiple-Input-Multiple-Output) radar non-adaptive filtering, and discloses a non-adaptive clutter pre-filtering space-time two-dimensional cancellation method for airborne MIMO radar. The non-adaptive clutter pre-filtering space-time two-dimensional cancellation method comprises the following steps: firstly constructing the clutter model of the airborne MIMO radar, obtaining the parameters, such as radar wavelength, pulse repletion rate, radar transmitted waveform and airborne speed in an angle-Doppler domain distribution trajectory, of clutter, and taking these parameters as prior information for the design of an airborne MIMO space-time two-dimensional pulse phase canceller; then using the designed space-time two-dimensional pulse phase canceller for pre-filtering the clutter. Due to the adoption of the method, the target detection performance by using traditional MTI (Moving Target Indication) of cascading is obviously improved compared with traditional MTI without pre-filtering. Through the application of cascading space-time self-adaptive algorithm after pre-filtering, a majority of clutter power is effectively inhibited, and the algorithm performance is improved. The method is suitable for side-looking radar, and similarly suitable for squint radar.

Description

technical field [0001] The invention belongs to the technical field of airborne MIMO radar non-adaptive filtering, in particular to an airborne MIMO (Multiple-Input-Multiple-Output) radar non-adaptive clutter pre-filter space-time two-dimensional cancellation method, specifically through the The airborne MIMO radar clutter model is analyzed, and the prior knowledge obtained from it is used to assist in the design of airborne MIMO radar clutter non-adaptive filtering space-time two-dimensional canceller, which is used for MIMO radar clutter preprocessing. Background technique [0002] From the middle of the 20th century to the present, radar technology has developed vigorously, and a large number of new technologies and new theories with important influences have emerged continuously. The multiple-input multiple-output technology enables the radar system to irradiate multiple independent wide beams simultaneously through time-energy management technology. As a new radar syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36G06F19/00G01S13/90
CPCG01S7/32G01S7/36
Inventor 冯大政侯瑞利曹杨冯祥卫任娅
Owner XIDIAN UNIV
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