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Maneuvering weak target detecting and tracking integral variable rate sampling fast method

A weak target detection and variable rate technology, which is applied in the directions of measuring devices, radio wave measurement systems, radio wave reflection/reradiation, etc., can solve the complex implementation process, large storage and calculation, and reduce calculation and storage requirements and other problems, to achieve the effect of reducing the amount of calculation, strong adaptability and practicability, and reducing the number of particle propagation

Active Publication Date: 2014-08-13
JIANGSU ZHONGHAI HUA HE ENVIRONMENTAL PROTECTION CO LTD
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Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of the existing mobile weak target detection and tracking methods, such as large storage and calculation, long time-consuming, complicated implementation process, etc., to provide a mobile solution that greatly reduces the calculation and storage requirements for the field of radar signal processing and data processing. A Fast Method for Weak Target Detection and Tracking Integration with Variable Rate Sampling

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  • Maneuvering weak target detecting and tracking integral variable rate sampling fast method

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with accompanying drawing.

[0014] like figure 1 As shown, the present invention includes the following steps (record t as the current moment, and T is the measurement sampling time interval):

[0015] 1. Particle initialization. 2. After obtaining the initial particles at the current time t, make a one-step prediction of the existence variables of each particle. 3. Determine whether the existence variable of the particle is 1 at the current time t. If the particle’s existence variable is 0, the state of the particle does not need to be defined; if the particle’s existence variable is 1, it is necessary to continue to judge whether the particle’s existence variable is 1 at the last measurement time (t-T). 4. If in the last measurement At time (t-T), the existence variable of the particle is still 1, then the particle is propagated through the variable rate sampling of the state equation; if the exi...

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Abstract

The invention discloses a maneuvering weak target detecting and tracking integral variable rate sampling fast method. According to the method, estimation feedback of a former measurement moment target state is used for detecting current moment target maneuverability, and a data sampling rate is decided according to the current target maneuverability for achieving variable rate sampling of state space. When the target maneuverability is strong, a high sampling rate is adopted so that detection reliability and track continuity can be ensured. When the maneuverability is weak, a low sampling rate is adopted so that target tracks can be maintained by a few state points. Finally, a variable rate sampling mechanism is applied to a particle wave-filtering detecting and tracking integral method so that detection and track of maneuvering weak targets on the condition of a low signal to noise ratio can be achieved. The method greatly reduces particle transmitting times, lowers calculated amount, and has strong adaptability and practical applicability.

Description

technical field [0001] The invention belongs to the field of radar signal processing and data processing, and relates to a fast method for integrated variable rate sampling of mobile weak target detection and tracking. Background technique [0002] Airborne early warning radar needs to detect and track the signals of weak maneuvering targets submerged in the strong and widely distributed earth-sea clutter. In the current airborne early warning radar low-altitude detection technology, target detection (signal processing) and target tracking (data processing) are two relatively independent links. This method of detecting first and then tracking is simple and effective for high signal-to-noise ratio detection environment (SNR>10dB). However, when the detection background is complex, the ground-sea clutter interference is strong, and the target signal is weak, it is usually difficult to find the signal of the weak target because the measurement data is simplified in the dete...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02G01S13/66
Inventor 郭云飞樊孔帅薛安克冯婷婷刘鑫
Owner JIANGSU ZHONGHAI HUA HE ENVIRONMENTAL PROTECTION CO LTD