Method for simulating distributed type MIMO sky wave beyond visual range radar sea clutter

A technology of over-the-horizon radar and simulation method, which is applied in radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc. It can solve problems such as inapplicability of simulation method and achieve high simulation accuracy

Active Publication Date: 2014-06-18
NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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Problems solved by technology

At present, the simulation research on sea clutter of sky-wave over-the-horizon radar is based on (quasi) single-base application background, while for distrib

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  • Method for simulating distributed type MIMO sky wave beyond visual range radar sea clutter
  • Method for simulating distributed type MIMO sky wave beyond visual range radar sea clutter
  • Method for simulating distributed type MIMO sky wave beyond visual range radar sea clutter

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings. With reference to the accompanying drawings in the description, the specific implementation of the present invention is divided into the following steps:

[0021] (1) input the ionospheric parameters, the position of each transceiver station of the distributed MIMO sky-wave over-the-horizon radar, the transmission frequency, the observation position and other parameters into the device 1 to perform ray tracing calculation, and obtain the electromagnetic wave incident and corresponding to each transceiver channel on the observation sea surface Azimuth and elevation angles of return scatter;

[0022] (2) Input the sea surface parameters, and the azimuth and elevation angles of incident and return scattering of electromagnetic waves corresponding to each transceiver channel on the observed sea surface calculated by device 1 to device 2, and calculate the normalize...

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Abstract

The invention discloses a method for simulating distributed type MIMO sky wave beyond visual range radar sea clutter, and belongs to the field of radar radio wave propagation. An existing simulating method is mainly suitable for a sky wave beyond visual range radar of a traditional (standard) single base or a double-base ground-wave radar but not suitable for the situation of a distributed type MIMO sky wave beyond visual range radar, and not all physical factors are taken into consideration. The method is suitable for the situation of the distributed type MIMO sky wave beyond visual range radar, the geometrical relationship between the incidence direction and returning scattering direction of receiving and sending channels relative to the sea surface of the observing area is calculated based on digital ray tracing, and the scattering sectional area expression of normalization of double-base one-order and two-order sea clutter of all the receiving and dispatching channels is inferred; after the scattering sectional area expression and the Doppler transfer function of a receiving and dispatching propagation path are convoluted, the sea clutter power spectral density of the receiving end is obtained based on the radar equation; lastly, the random time sequence of sea clutter and noise at the receiving end is obtained according to the power spectral density. According to the simulation method, the factors affecting the distributed type MIMO sky wave beyond visual range radar sea clutter are fully taken into consideration, precision is high, universality is good, and the method has popularization and application value.

Description

1. Technical field [0001] The invention belongs to the field of radar electric wave propagation, and in particular relates to a distributed MIMO sky-wave over-the-horizon radar sea clutter simulation technology. 2. Background technology [0002] The adoption of the distributed MIMO system is one of the important trends in the development of sky-wave over-the-horizon radar. The detection of slow-moving ship targets on the sea surface in strong sea clutter is one of the key points and difficulties in sky-wave over-the-horizon radar detection. Distributed MIMO sky-wave over-the-horizon radar adopts multiple transmitting stations and receiving stations with wide spatial distribution. Multiple transmitting stations simultaneously transmit orthogonal transmitting waveforms, which are reflected by the ionosphere to reach the target. After the target is scattered, part of the scattered signal passes The ionospheric reflection reaches each receiving station, and the receiving statio...

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/40G01S13/003G01S2013/0227
Inventor 薛永华关键王国庆周伟刘宁波宋杰董云龙何友
Owner NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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