Near-field calibrating method for high frequency surface wave radar uniform straight line array receiving channel

A uniform straight line, near-field technology, applied in the direction of radio wave reflection/re-radiation, radio wave measurement system, instrument, etc., can solve the problem that the phase error of the receiving channel has a great influence on the high-resolution algorithm, the estimation and calibration are difficult, and the channel corrects the phase Unbelievable estimated values ​​and other problems, to achieve the effects of reducing development costs and maintenance costs, good accuracy and robustness, and meeting real-time requirements
CN1740812AInactive Publication Date: 2006-03-01WUHAN UNIV
0 Cites 21 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV
Publication Date
2006-03-01
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invented near-field correction method includes the following steps: utilizing position information of radar antenna array and high-frequency sea-state radar marine echo characteristics to detect marine echo with single-bearing arrival angle, and utilizing single-bearing arrival angle marine echo and multiple signal classification algorism to estimate channel amplitude mismatch factor to implement amplitude correction; utilizing near-field single auxiliary signal source set on the extended line of antenna array and utilizing amplitude-corrected single-bearing arrival angle near-field arrival wave signal, position information of array unit antenna, bearing information of near-field auxiliary source and multiple signal classification algorism to estimate and obtain mismatch factor of channel phase so as to implement phase correction.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a near-field correction method for a single auxiliary source in a receiving channel of a uniform linear antenna array of a high-frequency surface wave radar. Background technique

[0002] High-frequency surface wave over-the-horizon radar utilizes the characteristics of small diffraction and propagation attenuation of vertically polarized high-frequency electromagnetic waves on the conductive ocean surface, and can over-the-horizon detect moving targets such as ships, aircraft, and missiles that appear below the line of sight at sea level. In addition, the high-frequency surface wave over-the-horizon radar uses the first-order and second-order scattering mechanisms of the ocean surface for high-frequency electromagnetic waves to extract ocean dynamic parameters such as wind field, wave field, and flow field from radar ocean echoes, which can realize Large-scale, high-precision and all-weather real-time monitoring of the marine ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More