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Multi-weak target ht-stc-tbd detection method under radar ranging ambiguity

A technology of HT-STC-TBD and fuzzy conditions, which is applied in the directions of measurement devices, radio wave measurement systems, radio wave reflection/reradiation, etc., and can solve problems such as large application limitations and inability to be used in multi-target environments

Inactive Publication Date: 2011-12-28
NAVAL AVIATION UNIV
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  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to propose a HT-STC-TBD detection method with an unknown number of weak targets under the condition of radar ranging ambiguity, which can solve the application limitations faced by the existing dynamic programming method and cannot be used in a multi-target environment Defects

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  • Multi-weak target ht-stc-tbd detection method under radar ranging ambiguity

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Embodiment Construction

[0084] Below in conjunction with the accompanying drawings, the method for detecting many weak targets HT-STC-TBD under the radar ranging ambiguity condition of the present invention is described in detail (refer to the description attached) figure 1 ).

[0085] Example conditions: Assuming that two targets move in a straight line at a uniform speed on the X-Y plane, the initial position of target 1 (21km, 22km), the speed in x direction and the speed in y direction are (120m / s, 330m / s) respectively, and the initial position of target 2 (22km, 35km), the speed in the x direction and the speed in the y direction are (160m / s, 190m / s). The radar uses three different pulse repetition frequencies, each pulse repetition frequency f r They are 16000Hz, 11400Hz and 19400Hz respectively, the corresponding pulse repetition periods are 62μs, 87μs and 51μs respectively, the radar scanning period is T=1s, a total of 17 scanning periods are simulated, and the range-azimuth resolution unit ...

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Abstract

The invention discloses an HT-STC-TBD (Hough Transform and Successive Target Cancellation Based Track-Before-Detect) detection method for multiple weak targets under a radar-ranging fuzzy condition and belongs to the field of radar data processing. The HT-STC-TBD detection method comprises the following steps: (1) sending a measured target value which is detected by a high / middle pulse repetitionfrequency radar (such as an airborne pulse Doppler radar) into a data processing computer and then acquiring all the possible states of a target in the data processing computer; (2) performing Hough transformation on the possible states, thereby acquiring an energy accumulation column diagram; (3) searching for a peak value of the energy accumulation column diagram and performing Hough inverse transformation according to a peak value coordinate so as to confirm a valid detecting data point; (4) eliminating a false track, modifying a state of the target and realizing once target tracking; (5) eliminating the influence of the last detection and secondarily detecting the target; and (6) repeating the steps (3)-(5) till all the targets are detected, thereby realizing the tracking and detection of multiple weak targets.

Description

technical field [0001] The invention belongs to the field of radar data processing, and is suitable for detecting unknown number of weak targets by high / medium pulse repetition frequency radars (such as airborne pulse Doppler radars, etc.). Background technique [0002] In modern warfare, in order to measure speed without ambiguity, high / medium pulse repetition frequency radars are widely used, such as airborne fire control radars, airborne early warning aircraft radars, etc. However, when the radar uses high / medium pulse repetition frequency, it will lead to ambiguity in the radar distance measurement, that is, the radar distance measurement value cannot accurately reflect the actual distance of the target; especially in complex battlefield environments including multiple targets, clutter and noise, Multiple targets may be detected at one pulse repetition frequency, and the problem of tracking and detection of weak targets with high repetition rate radar becomes more compli...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S13/70
Inventor 王国宏于洪波王娜谭顺成
Owner NAVAL AVIATION UNIV
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