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

A communication method based on low-orbit mobile communication satellite

A technology for communication satellites and communication methods, which is applied in the communication field of low-orbit mobile communication satellite signals, and can solve problems such as limited anti-interference ability and unguaranteed positioning and timing functions, so as to improve anti-interference ability, improve ranging performance and timing accuracy , the effect of high code rate

Active Publication Date: 2021-06-11
XIAN INSTITUE OF SPACE RADIO TECH
View PDF23 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The iGPS patent uses the idle communication service channel to broadcast narrowband PRN, and the positioning and timing function is not guaranteed; the STL signal is an improvement on the original one-way time slot of Iridium. It is a narrowband pulse spread spectrum signal and its own anti-interference ability is limited.

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
  • A communication method based on low-orbit mobile communication satellite
  • A communication method based on low-orbit mobile communication satellite
  • A communication method based on low-orbit mobile communication satellite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0074] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0075] The invention belongs to the field of satellite navigation, in particular to a modulation method and generation method of a Security Positioning and Timing (SPT) signal based on a low-orbit mobile communication satellite.

[0076] The low-orbit mobile communication satellite signal based on the invention adopts a time-division / frequency-division / space-division hybrid system, that is, the downlink service signal adopts the TDMA+FDMA+multi-beam system, and the uplink and downlink are also frequency-divided.

[0077] In order to achieve the above object, the present invention discloses a communication method based on low-orbit mobile communication satellite signals with anti-interference safety positioning and timing performance, such as figure 1 shown.

[0078] Generate a low-orbit mobile communication satellite signal for safe position...

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

A communication method based on a low-orbit mobile communication satellite, which generates a low-orbit mobile communication satellite signal for safe positioning and time service and communicates; the signal has the following characteristics: time domain structure: the communication satellite signal adopts a time division multiplexing system in the time domain; Frequency domain structure: The communication satellite signal adopts a frequency division multiplexing system in the frequency domain; the communication satellite signal adopts a multi-beam multi-color multiplexing system, and each beam uses one or more sub-frequency bands according to needs, while satisfying the multiplex of adjacent beams. Color multiplexing to reduce inter-beam interference; at least one sub-band in the communication satellite signal is used to broadcast the paging channel signal, that is, the PCH signal; the sub-band of the communication satellite signal, except for broadcasting the PCH signal, the rest can be used Based on the safe positioning and timing SPT signal of broadband spread spectrum, the SPT signal broadcasts the N of the PCH signal PCH broadcast in time slots. The invention designs a communication and navigation fusion SPT signal system to realize positioning and timing and anti-interference ability improvement.

Description

technical field [0001] The invention belongs to the field of satellite navigation, and mainly relates to a communication method for low-orbit mobile communication satellite signals based on anti-jamming safe positioning and time service. Background technique [0002] With the development of the Global Navigation Satellite System (GNSS), the basic pattern of the four major GNSSs has been formed. GNSS-based applications have gradually penetrated into all aspects of national economic life and become an indispensable national infrastructure. At the same time, the inherent "vulnerability" of GNSS signals, such as low signal landing power, susceptibility to interference, and spoofing, has aroused widespread concern. [0003] At present, domestic and foreign low-orbit satellite constellations are booming. Low-orbit satellites have the natural advantage of low orbits, and the signal landing power limit is higher than that of GNSS signals, which can make up for the "vulnerability" o...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/05G01S19/10G01S19/25G01S19/29G01S19/30
CPCG01S19/05G01S19/10G01S19/256G01S19/29G01S19/30
Inventor 蒙艳松严涛周昀王瑛雷文英王国永边朗
Owner XIAN INSTITUE OF SPACE RADIO TECH
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