High-frequency sky-ground wave MIMO radar realization method

An implementation method, space-to-ground wave technology, applied in the field of radar, can solve problems such as poor spatial resolution of beams, achieve the effects of improving detection accuracy, expanding detection range, and eliminating multipath effects

Inactive Publication Date: 2017-02-15
WUHAN UNIV
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Problems solved by technology

However, in the space-to-ground wave radar system, problems such as the multipath effect o

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  • High-frequency sky-ground wave MIMO radar realization method
  • High-frequency sky-ground wave MIMO radar realization method
  • High-frequency sky-ground wave MIMO radar realization method

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[0046] The present invention will be further described in detail below in conjunction with examples. The implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0047] A method for realizing high-frequency space-to-ground wave MIMO radar, the method mainly includes the design of radar antenna array and transmitting waveform and echo processing, specifically includes the following steps,

[0048]Step 1: Simulate and design the transmitting and receiving antenna array of space-to-ground wave MIMO. Under the permission of the geographical environment and the requirements of detection accuracy, by simulating the radiation pattern of the transmitting and receiving antenna array, determine the number of array elements of each sky-wave transmitting station and receiving station; and determine the working frequency f of the sky-ground wave MIMO radar 0 And the formation and aperture of...

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Abstract

The invention discloses a high-frequency sky-ground wave MIMO radar realization method, and provides an effective solution for the problems of multipath and multi-mode effect and clutter Doppler expansion and the like for a sky-ground wave over-the-horizon radar. A radar system is formed by a plurality of sky wave transmitting stations and a plurality of ground wave receiving stations. Each transmitting station and each receiving station are formed by a plurality of antenna units, so that coexistence of distributed and intensive MIMO radars is realized, and spatial resolution is improved, and multi-angle observation can be realized. By allocating different frequency bands or phases to transmitting subunits, a multiplexed orthogonal effect of transmitting signals is realized. The receiving stations realize pulse compression through frequency mixing and filtering, so that separation of multipath orthogonal signals is realized. The multi-angle observation enlarges detection range and improves detection precision; and MIMO virtual array elements enable the sky-ground wave MIMO radar system to have flexible wave beam formation capability, and influence from different-spatial-orientation multipath and multi-mode effect and clutter expansion due to ionosphere contamination in the sky-ground wave radar can be eliminated properly.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a method for realizing a high-frequency space-to-ground wave MIMO radar, which is used to solve problems such as multipath, multimode effect and clutter Doppler broadening faced by space-to-ground wave over-the-horizon radar. Background technique [0002] Space-ground wave integrated over-the-horizon radar belongs to a new system of radar. It adopts a bistatic system and works in a new propagation mode of sky wave reflection / ground wave diffraction. After reflection, it reaches the ground (sea) surface through free space, and then propagates to the ground wave receiving point in the form of surface wave through the ground (sea) surface. The receiver can be placed on the coast or ship far away from the transmitter, which has a large Flexibility, and the receiver is close to the target, and the received target echo is strong. However, due to the layered and non-stationar...

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Application Information

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IPC IPC(8): G01S7/02G01S7/36G01S7/282G01S7/285G01S7/41
CPCG01S7/02G01S7/282G01S7/285G01S7/36G01S7/41
Inventor 吴雄斌李苗张兰岳显昌柳剑飞
Owner WUHAN UNIV
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