Phase measurement method based on intelligent tracking correlation operation

A technology of intelligent tracking and correlation calculation, applied to the phase angle between voltage and current, measuring device, measuring electrical variables, etc., can solve the loss of spectrum energy, the lack of accuracy of fast Fourier transform method and correlation algorithm, and the decrease in accuracy, etc. question

Active Publication Date: 2021-05-04
NO 8511 RES INST OF CASIC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The theory of fast Fourier transform is based on the fact that the phase difference of multi-channel sine wave signals is equal to the phase difference of the discrete spectrum of each sampling sequence at the maximum spectral line. Significantly reduced; the correlation algorithm is based on the cross-correlation function and autocorrelation function of multi-channel sine wave signals, and solves the p

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Phase measurement method based on intelligent tracking correlation operation
  • Phase measurement method based on intelligent tracking correlation operation
  • Phase measurement method based on intelligent tracking correlation operation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] A phase measurement method based on intelligent tracking correlation operation, the method steps are as follows:

[0039] Step 1. At the sampling rate f s Under the condition of =1000MHz, three types of original intermediate frequency signals, namely narrow-band conventional, phase modulation with a bandwidth of 5MHz and linear frequency modulation with a bandwidth of 5MHz, are collected respectively, and a total of N=2 channels are collected, and each channel M=512 points, so as to construct the collection data vector X 1 and x 2 ; Measure the center frequency f=560MHz of the first channel of original intermediate frequency data collected, and the bandwidths are narrowband, B=5MHz and B=5MHz respectively.

[0040] Step 2. According to the original intermediate frequency data X of the first channel 1 Bandwidth B = 5MHz intelligent matching, generating a set of passband bandwidth K = 20 order low-pass filter coefficient h of 6MHz Lowpass , and construct an intelligen...

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

No PUM Login to view more

Abstract

The invention discloses a phase measurement method based on intelligent tracking correlation operation, and belongs to the field of electronic countermeasures. The method comprises the following steps: firstly, constructing N paths of acquisition data vectors, and measuring the center frequency and bandwidth of a first path of signals; secondly, generating a group of bandwidth-adaptive low-pass filter coefficients according to the bandwidth intelligent matching of the first path of signals, and constructing an intelligent tracking filtering vector according to the center frequency of the first path of signals; thirdly, conducting convolution on the N paths of collected data vectors and the intelligent tracking filtering vector to obtain N paths of intelligent tracking data vectors; fourthly, performing correlation operation on the intelligent tracking data vectors from the second path to the Nth path and the intelligent tracking data vector of the first path; and finally, respectively extracting phase information of related results, namely phase differences between the second path to the Nth path and the first path.

Description

technical field [0001] The invention belongs to high-precision phase measurement technology, in particular to a phase measurement method based on intelligent tracking correlation calculation. Background technique [0002] In the field of electronic countermeasures, phase, as a typical signal characteristic parameter, plays a very important role in the directions of target direction finding and individual identification of radiation sources. At present, most of the domestic phase measurement systems are based on analog circuit design. Such phase measurement systems often have low precision, large volume, and high cost. Thanks to the development of large-scale digital integrated circuits, digital phase measurement technology is becoming more and more mature, and its advantages such as high precision and good system stability make it widely used. [0003] There are mainly two methods of digital phase measurement technology, fast Fourier transform (FFT) and correlation operatio...

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
no application Login to view more
IPC IPC(8): G01R25/00
CPCG01R25/00
Inventor 张健伟王铁丹于志良黄成峰业瀚青
Owner NO 8511 RES INST OF CASIC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap