Segment processing method suitable for constant false alarm detection of impulse radar

A technology of constant false alarm detection and processing method, which is applied in the segmental processing field of impulse radar constant false alarm detection, to achieve the effect of reducing the amount of data processing and high application value

Active Publication Date: 2016-07-13
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Segment processing method suitable for constant false alarm detection of impulse radar
  • Segment processing method suitable for constant false alarm detection of impulse radar
  • Segment processing method suitable for constant false alarm detection of impulse radar

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[0024] The present invention will be described in detail below with reference to the drawings and embodiments.

[0025] To ensure real-time tracking of high-speed targets in the far field, the impulse radar receiver adopts a direct high-speed sampling receiving mode. Because the pulse width of the impulse radar is extremely narrow and the bandwidth is very wide, generally reaching GHz, in order to meet the Nyquist sampling rate and engineering design needs, the receiver sampling rate is generally required to reach several GHz or even higher. This requires the receiver to have high data acquisition, storage and processing capabilities.

[0026] In order to reduce the receiver's requirements for data storage and processing, and ensure the continuity of tracking detection, the present invention provides a segmented processing method suitable for impulse radar constant false alarm detection, including the following steps:

[0027] Step 1: Sample the pulse signal received by the impulse ...

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Abstract

The invention discloses a segment processing method suitable for the constant false alarm detection of an impulse radar, and the method comprises the steps: enabling data in a pulse repetition period to be divided into a plurality of data child segments, wherein the head and tail of each data child segment are repetition regions, the central part of each data child segment is a non-repetition region, and the repetition regions are a processing region, a mixing region, and a reference region; 2, carrying out the CFAR detection of the non-repetition region, the mixing region and the processing region of each data child segment, wherein the length of the data of each reference region is not less than the sum of the length of the protection unit and reference unit in a CFAR detector in a process of processing the data of the mixing regions through a sliding window; 3, deleting the data of the reference regions in the data child segments; 4, selecting one group of the processed data of the mixing regions at the tail of each data child segment and at the central part of the next data child segment as the final data of the mixing regions, enabling the final data to be combined with the processed data of the non-repetition segments and the processing segments, and forming a complete data segment. The method can reduce the size of data processed in the pulse repetition period, and is better in statistic effect of clutters and noise.

Description

technical field [0001] The invention relates to the technical field of impulse radar constant false alarm detection, in particular to a segmentation processing method suitable for impulse radar constant false alarm detection. Background technique [0002] Impulse radar is a kind of ultra-wideband radar, and many literatures have carried out a lot of research on it. Its essence is to use ultra-narrow pulse to realize target detection. Constant false alarm detection is a commonly used detection method in modern radar systems. Constant false alarm detection (CFAR) is widely used in contemporary radar systems because it can automatically adjust the threshold according to the intensity changes of interference and noise under a certain false alarm probability, which improves the stability and accuracy of radar detection. [0003] Due to the wide bandwidth of impulse radar, very high sampling rates are required. A high sampling rate can put a lot of pressure on the storage and pr...

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Application Information

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IPC IPC(8): G01S7/35G01S7/36
CPCG01S7/352G01S7/36
Inventor 王旭王腾蒋继凤夏新凡魏国华
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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