Generation method of OTH (Over-The-Horizon) radar transmitting waveform

A technology of transmitting waveform and radar, applied in the field of radar communication to achieve the effect of optimizing estimation performance

Inactive Publication Date: 2013-04-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

This processing method only calculates the ground position and radial velocity of the target in the data processing stage, but fails to make full use of the specific scene where the OTH radar detects the target through ionospheric refraction and reflection in the signal processing stage

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  • Generation method of OTH (Over-The-Horizon) radar transmitting waveform
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  • Generation method of OTH (Over-The-Horizon) radar transmitting waveform

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Embodiment Construction

[0014] Any feature disclosed in this specification (including any appended claims, abstract), unless otherwise stated, may be replaced by alternative features that are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0015] The idea of ​​the present invention is that, according to the ionospheric related data (number of layers, maximum electron concentration, half-thickness, height) obtained by the ionospheric detection equipment of OTH radar, the propagation path of the transmitted signal can be deduced; number, number of receiving antennas, receiving array element spacing (interval between receiving antennas)) and estimated sea clutter parameters (Bragg frequency, amplitude), the ionospheric phase pollution frequency and target parameters (ground distance , motion speed), and then based on the requirements of the radar system for the transmitted waveform (the n...

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Abstract

The invention discloses a generation method of an OTH (Over-The-Horizon) radar transmitting waveform, belongs to the technical field of radar communication, and in particular relates to a generation method of the OTH radar transmitting waveform based on a parameter estimation performance of an object detected. The method comprises the steps of: obtaining a possible waveform to be transmitted according to current available frequency range and detection requirements; then, inversing a Fisher information matrix F (theta) based on associated parameter of a radar base station, state of an ionized layer, frequency shift of the ionized layer, sea clutter, noise base and the like; and selecting the waveform with the minimum first and second elements on the diagonal line in a matrix F-1(theta) as the transmitting waveform of the mth transmitting antenna to obtain the transmitting waveform with optimal detection performance. The generation method provided by the invention is suitable for various conditions in which parameters of the radar base station, the state of the ionized layer, the sea clutter, the available frequency range and the like change, and further suitable for MIMO-OTH (Multiple Input Multiple Output-Over-The-Horizon) radars and conventional phased array OTH radars.

Description

technical field [0001] The invention belongs to the technical field of radar communication, in particular to an OTH radar emission waveform generation method based on the parameter estimation performance of a detected target. Background technique [0002] Over-the-horizon radar (OTH) radar can overcome the curvature of the earth to detect and track targets beyond the visual range. The high-frequency electromagnetic waves emitted by sky-wave OTH radar use the ionosphere as the transmission medium, and the signal processing needs to detect targets and estimate parameters in sea clutter. With the introduction of multiple-input multiple-output (MIMO) technology into the radar field and its in-depth research, the application of MIMO technology to OTH radar has also received attention. The system that uses MIMO technology for OTH radar is called MIMO-OTH radar system. [0003] In the past, the transmitting waveform of phased array OTH radar was basically limited to linear freque...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/03
Inventor 罗忠涛何茜何子述汪霜玲
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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