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Radar signal processing method

A radar signal processing and data technology, applied in the direction of radio wave measurement systems, instruments, etc., can solve problems such as easy to lose targets, and achieve the effect of improving the detection probability

Active Publication Date: 2012-06-13
无锡市雷华科技有限公司
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Problems solved by technology

Existing technology tends to miss smaller targets when the number of targets is large

Method used

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Embodiment Construction

[0024] In order to deepen the understanding of the present invention, the present invention will be described in further detail below in conjunction with the embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0025] As shown in the figure, a radar processing method of the present invention includes the following steps:

[0026] Step 1: Static clutter image filtering processing and strong echo identification processing;

[0027] After the processor receives the target power data and the current antenna angle data, it extracts the one-dimensional static clutter data applicable to the current antenna angle from the complete static clutter map (Figure 1) according to the antenna angle data, and obtains the static clutter data Mark the clutter information on the target power data; after completing the static clutter mark, mark the larger target whose power in...

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Abstract

The invention relates to a radar signal processing method. The method comprises the following steps: a matched one-dimensional static clutter map applicable to the present angle can be extracted from an integral two-dimensional static clutter map, and range gates positioned within a clutter region are identified; target power data is traversed to identify a range gate outside the clutter region and with the power strength exceeding a deletion threshold; then one-dimensional OS-CFAR (Order Statistics Constant Alarm False Rate) filter processing is carried out; the target power data of each range gate is sequentially judged together with a fixed threshold and a floating threshold generated after one-dimensional OS-CFAR filtering to detect the target; all the detected target points are traversed to detect target peaks; and taking each target peak as the center, the positions of power data continually descending below a target separation threshold are searched to calculate the target length. By adopting the method, multi-target properties in the airport environment are optimized, and the probability of detecting smaller targets nearby larger targets is improved; and besides, the processor time is concentrated in regions interested by users, and only very few processor time is spent in the regions uninterested by the users.

Description

Technical field [0001] The invention relates to a radar signal processing method. Background technique [0002] Surface surveillance radar is a kind of radar used to monitor aircraft and vehicles on the surface. It emits electromagnetic waves through antennas, collects scattered echoes and sends them to the receiver to process the echo signals, thereby discovering the target, and extracting the target distance, azimuth, etc. Information, providing clear airport images, including moving aircraft and vehicles. [0003] The surface surveillance radar is an X-band pulse system radar that uses narrow pulses to achieve close-range detection and wide pulses to achieve long-range detection. [0004] At present, the products have realized the use of digital signal processing technologies such as digital pulse compression and coherent accumulation. At the same time, it adopts movable target track processing technology. Signal processing and analysis are the same as using a single-chip ultra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
Inventor 张勇张象羽吴晓东武卫张树林郝志梅刘洋涛王亚宁
Owner 无锡市雷华科技有限公司
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