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Airborne phased array radar two-dimensional multi-pulse cognitive clutter suppression method

A phased array radar, two-dimensional multi-pulse technology, applied to radio wave measurement systems, instruments, etc., can solve poor clutter cancellation performance, large clutter fluctuation, and poor TDPC clutter suppression ability, etc. question

Inactive Publication Date: 2014-07-30
XIDIAN UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

Based on prior knowledge, TDPC can suppress clutter signals, but considering the large fluctuation of clutter and the Doppler domain diffusion of clutter along the distribution track, the ability of TDPC to suppress clutter is not very good, especially in African In side-looking radar, clutter cancellation performance is worse

Method used

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  • Airborne phased array radar two-dimensional multi-pulse cognitive clutter suppression method

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Embodiment Construction

[0073] refer to figure 1 and figure 2, illustrating a cognitive clutter suppression method of two-dimensional multi-pulse airborne phased array radar of the present invention, the present invention is used for signal processing of airborne phased array radar, and its specific implementation steps are as follows:

[0074] Step 1. Construct the ground clutter echo signal model of the airborne phased array radar;

[0075] 1a) Set the airborne phased array radar antenna as a uniform planar array structure, the flight speed of the carrier aircraft is v, the planar array is equivalent to a uniform linear array with the number of array elements N, and the gap between the baseline of the linear array and the flight track of the carrier aircraft is yaw angle The distance between array elements is d, the working wavelength of the airborne phased array radar is λ, and the pulse repetition frequency PRF is f r , the pulse repetition period is T=1 / f r ; and it is set that the airbor...

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Abstract

The invention belongs to the technical field of radar signal processing, relates to the technology of radar clutter processing, and discloses an airborne phased array radar two-dimensional multi-pulse cognitive clutter suppression method. The method includes the steps that (1) a ground clutter echo signal model of airborne phased array radar is built, (2) a residual clutter echo signal is obtained through calculation according to the ground clutter echo signal model, (3) by means of residual clutter echo energy of the residual clutter echo signal, a two-dimensional multi-pulse phase canceller coefficient matrix is solved, (4) by means of the two-dimensional multi-pulse phase canceller coefficient matrix, clutter suppression is carried out on one echo signal received by the airborne phased array radar within coherent processing time. The method enables clutter to be suppressed greatly, is suitable for front side looking radar and suitable for non-front-side-looking radar, and is applied to radar clutter processing scenes.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and relates to radar clutter processing technology, in particular to a two-dimensional multi-pulse cognitive clutter suppression method for airborne phased array radar. Background technique [0002] In radar target detection, ground clutter is a signal reflected by ground scattering points, which is a kind of interference signal that needs to be suppressed. Radar Moving Target Detection (hereinafter referred to as MTD) technology is one of the commonly used techniques for suppressing interference on radar platforms. Its function is to detect target signals while suppressing interference. In order to overcome the limitations of conditions such as the curvature of the earth and terrain obstacles, the radar is set up on a very high aircraft platform. The airborne radar has a larger visual range and has the ability to find ultra-low-altitude flying targets and long-range moving target...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36
CPCG01S7/2813G01S7/36G01S7/41
Inventor 冯大政向平叶曹杨周延虞泓波解虎
Owner XIDIAN UNIV
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