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A Dynamic Programming Detection Method for PD Radar Faint Targets Based on Range Matching

A distance matching and dynamic programming technology, applied in radio wave measurement systems, instruments, etc., to solve problems such as PD radar ambiguity

Active Publication Date: 2019-04-26
NAVAL AVIATION UNIV
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  • Abstract
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Problems solved by technology

[0013] The purpose of the present invention is to propose a PD radar weak target dynamic programming detection method based on distance matching, fundamentally solve the problem that the dynamic programming method cannot be applied to PD radar ambiguity

Method used

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  • A Dynamic Programming Detection Method for PD Radar Faint Targets Based on Range Matching
  • A Dynamic Programming Detection Method for PD Radar Faint Targets Based on Range Matching
  • A Dynamic Programming Detection Method for PD Radar Faint Targets Based on Range Matching

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Embodiment

[0088] Example conditions: Simulation is carried out for a general single-target motion scene. Assuming that the target is moving in a straight line at a uniform speed in the x-y plane, its initial position is (51km, 22km), the speed is (-220m / s, 230m / s), the target is a non-fluctuating target, and its radar cross-sectional area is 0.1m 2 . The sensor parameters are set as follows: the two-coordinate PD radar is at the origin of the coordinates, the scanning period is 1s, the maximum operating distance is 70km, and the transmission power is P t =5kw, carrier wavelength λ=0.1m, radar antenna gain 34dB, radar distance resolution is 150m, angle resolution is 0.5°. The radar uses three different PRF transmission pulses to work in turn, each PRF is 16000Hz, 111400Hz and 119400Hz respectively, and the corresponding maximum unambiguous distance is Ru 1 =9375m, Ru 2 =13158m, Ru 3 =7732m. For the case where the target signal-to-noise ratio is 7dB, the data of 25 scanning moments a...

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Abstract

The invention discloses a PD radar weak target dynamic planning detection method based on distance matching, belonging to the field of radar weak target detection and tracking. Usually a high pulse repetition frequency is used by a PD radar, thus radar distance measurement is fuzzy, and especially in a low signal-to-noise ratio environment including clutter and noise, the detection of a PD radar weak target becomes more complicated. Based on an idea of detection before tracking, the invention provides a PD radar weak target dynamic planning detection method based on distance matching. Firstly, the space-time correlation of target fuzzy measurement is recovered through distance matching processing, then by using the characteristic of dynamic programming batch processing, the non-coherent integration of weak target information is realized, the missed detection of a target caused by PD radar distance measurement ambiguity and a weak target low signal-to-noise ratio characteristic is avoided, the detection efficiency of a weak target by the PD radar can be effectively improved, a project is easy to realize, and the method has high practicability and popularization value.

Description

technical field [0001] The invention belongs to the field of radar weak target tracking before detection, and is suitable for solving the problem of accumulation detection of weak targets under the fuzzy condition of PD radar ranging. Background technique [0002] The detection and tracking of weak targets by radar is a difficult and crucial problem, which is of decisive significance for winning the future high-tech war. With the development of stealth technology, the appearance of weak targets poses a huge challenge to radar performance. Due to the very low signal-to-noise ratio of the echo signals of weak targets, the traditional short-time coherent accumulation detection method cannot achieve reliable target detection. On the one hand, in order to measure the target velocity without ambiguity, PD radar usually adopts high and medium pulse repetition frequency mode, so that the distance measurement of the target is ambiguous, which makes the detection of weak targets more ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 于洪波王国宏吴巍谭顺成王娜孙殿星吉喆
Owner NAVAL AVIATION UNIV
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