Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

VDES satellite receiver frame header detection method and system

A technology of a satellite receiver and a detection method, which is applied to a device dedicated to a receiver, a transmission system, a digital transmission system, etc., can solve the problems of not being able to know the time of the VDES signal, not participating in communication, etc.

Active Publication Date: 2020-12-01
SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2) The satellite is only for reconnaissance and does not participate in the communication in the self-organizing time-division multiplexing area, so it is impossible to know the time when each ship sends the ground-side VDES signal

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
  • VDES satellite receiver frame header detection method and system
  • VDES satellite receiver frame header detection method and system
  • VDES satellite receiver frame header detection method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Such as figure 1 As shown, the present embodiment provides a kind of VDES satellite receiver frame header detection method, it is characterized in that, comprises the following steps:

[0058] S1: Preprocess the received signal, and use the double Barker code characteristics in the frame structure of the VDES signal at the ground end to construct a periodic sequence to form a preprocessed signal, specifically:

[0059] For the frame header structural characteristics of the VDES signal at the ground end, it is determined that the received signal truncation length is 26 symbols to form a truncation signal, and the truncation signal is carried out including low-pass filtering and amplitude normalization (the truncation signal modulus is in In this embodiment, it is 1) processing, 13-symbol differential operation, 1-symbol differential operation and processing including its imaginary part, to obtain a periodic preprocessing signal with a period of 2M and a total length of N...

Embodiment 2

[0090] In order to implement the VDES satellite receiver frame header detection method in the first embodiment, the present embodiment provides a system corresponding to the method in the first embodiment, specifically including:

[0091] The received signal preprocessing module 1 is used to preprocess the received signal, and utilizes the double Barker code characteristics in the frame structure of the VDES signal at the ground end to construct a periodic sequence to form a preprocessed signal;

[0092] A single ground-side VDES signal frame header detection module 2 is used to perform Fourier transform on the pre-processed signal. Based on the periodicity of the pre-processed signal, the transformed sequence will have a peak at a specific position, and carry out the The constant false alarm rate detection of the ground terminal VDES signal detects the ground terminal VDES signal;

[0093] The ground terminal VDES signal frame header detection module 3 is used for multiple ti...

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 relates to the technical field of ground end VDES signal detection. The invention provides a VDES satellite receiver frame header detection method and system, and the method comprises the steps: S1, carrying out the preprocessing of a received signal, constructing a periodic sequence through employing the double-Barker code characteristics in a frame structure of a ground end VDES signal, and forming a preprocessed signal; S2, performing Fourier transform on the preprocessed signal, based on the periodicity of the preprocessed signal, a peak value appears in a specific position of a transformed sequence, performing constant false alarm rate detection of the ground end VDES signal, and detecting the ground end VDES signal; S3, performing multiple times of constant false alarmrate detection, and when multiple times of ground end VDES signals are continuously detected, considering that the detected ground end VDES signals exist. The method has the technical characteristic of constant false alarm rate detection, and is beneficial to non-coordinated communication signal investigation of a satellite receiver.

Description

technical field [0001] The invention relates to the technical field of ground VDES signal detection, in particular to a frame header detection method and system of a VDES satellite receiver. Background technique [0002] With the great success of the application of the automatic identification system (AIS) and the continuous development of AIS functions, the network load of AIS is getting bigger and bigger, which damages the original concept of collision avoidance of AIS. In order to ensure the performance of AIS, the WP5B group of the International Telecommunication Union and the E-NAV group of the International Association of Navigational Aids and Aids to Navigation Aids held a meeting to discuss the technical solutions and development directions of the next-generation AIS—Very High Frequency Data Exchange System (VDES). On the basis of guaranteeing the highest priority of AIS, organizations such as the International Maritime Organization and the International Telecommunic...

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): H04L1/00H04B7/185
CPCH04L1/0036H04B7/18582
Inventor 周昊苏林博鑫陆文斌吕振彬秦夷
Owner SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com