An Improved Correlative Interferometer Phase Detection Method
A correlative interferometer and phase detection technology, applied in the field of radio monitoring, can solve the problems of easy matching errors of propagated data, increase the complexity of algorithms, etc., and achieve the effect of simplifying the phase detection method and shortening the measurement time
Active Publication Date: 2019-06-11
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although it can be solved by long and short baseline matching and virtual array element technology, it will increase the complexity of the algorithm, and the propagation data is prone to matching errors
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0025] Such as figure 2 Shown is the overall block diagram of the correlation interferometer described in the present invention, which is 9 antenna units arranged in a circular array. Antenna 1 is a reference antenna, and channels 2 to 9 of antennas perform quadrature phase detection with the reference antenna.
[0026] The relevant interferometer includes a receiver, signal processing board and display and control software; the receiver includes a receiving module, a phase detector and a phase shifting module, and the receiving module can perform amplification, filtering, and down-conversion; the signal processing board includes an electronic switch control unit, an acquisition module and phase defuzzification module; the display and control software includes a data receiving module, a sample library and a processing module...
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 PUM
Login to View More Abstract
The invention discloses a method for improving correlation interferometer phase demodulation. Two paths of orthogonal intermediate frequency (IF) signals are formed through 90 degrees phase shift of IF signals output by an auxiliary channel radio frequency (RF) module respectively and are subjected to phase demodulation simultaneously with the IF signal of a reference channel. The two phase demodulation results are subjected to quadrant solution fuzzy after analog-to-digital conversion to realize complex phase demodulation in four quadrants. Compared with the traditional phase demodulation method, the method has the advantages that phase shifting operation in different times is not needed, the realization method is simple, the arrival angle measurement time of is greatly shortened. A special phase demodulation circuit is employed, which ensures a greater dynamic range. Sampling is conducted after phase demodulation, so that a lower rate digital-to-analog converter can be used for data acquisition and the equipment is low in cost. The phase demodulation results are expressed in terms of voltage amplitude, and the phase difference between the channels are linearly related.
Description
technical field [0001] The invention belongs to the field of radio monitoring, and in particular relates to an improved correlation interferometer phase detection method. Background technique [0002] The measurement of the direction of the electromagnetic wave signal radiation source is of great significance in both military and civilian fields. There are many methods of signal direction finding, which can be divided into two categories in principle: amplitude method and phase method. Among them, the phase method generally has higher direction finding accuracy than the amplitude method. Ordinary phase direction finding generally has the problems of limited direction finding range (usually the direction finding range is within ±60°) and phase ambiguity. Although it can be solved by using long-short baseline matching and virtual array element technology, it will increase the complexity of the algorithm, and the propagation data is prone to matching errors. [0003] The cor...
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 Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/12
CPCG01S3/12
Inventor 朱栋张婷王益乐王远程邵华黄绍斌王寿峰赵春光
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP