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

A wireless transmission method for flight test telemetry based on adaptive ldpc coded modulation

A flight test, coding and modulation technology, applied in the field of flight test telemetry wireless transmission, can solve the problems that the test data transmission efficiency and reliability cannot be guaranteed, and achieve the effect of increasing effective transmission efficiency, reliable telemetry data transmission, and reducing the number of phases

Active Publication Date: 2017-11-17
HARBIN INST OF TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the test data transmission efficiency and reliability cannot be guaranteed in the case of dynamic changes in the quality of the wireless communication link, and propose a flight test telemetry wireless transmission method based on adaptive LDPC code modulation

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 wireless transmission method for flight test telemetry based on adaptive ldpc coded modulation
  • A wireless transmission method for flight test telemetry based on adaptive ldpc coded modulation
  • A wireless transmission method for flight test telemetry based on adaptive ldpc coded modulation

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0026] Specific implementation mode one: the following combination figure 1 and figure 2 Describe this embodiment, a kind of flight test telemetry wireless transmission method based on adaptive LDPC coding modulation of this embodiment, specifically prepare according to the following steps:

[0027] Step 1. During the flight test of the aircraft, in various wireless communication environments, the airborne transceiver uses the internal channel estimator to estimate the quality of the wireless communication link between the current airborne transceiver and the ground station transceiver, and uses the signal-to-noise than SNR i Indicates; After repeated tests and experiments, it is determined that the signal-to-noise ratio (SNR) is reliable during wireless transmission. i The coding rate R of the low-density parity check code (Low-Density Parity Check Code, LDPC) i and modulation scheme D i The mapping relationship M between; use M={(SNR i , R i ,D i )} represents; among...

specific Embodiment approach 2

[0046] Specific embodiment two: the difference between this embodiment and specific embodiment one is: LDPC code rate R in step one i Set to 1 / 4, 1 / 2, 2 / 3, 4 / 5 and 1. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0047] Specific implementation mode three: the difference between this implementation mode and specific implementation modes one or two is: in step one, the modulation scheme D i Set to BPSK, QPSK, 16QAM, 64QAM and 256QAM. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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 flight test telemetering wireless transmission method based on self-adaptive LDPC (low density parity check) coding modulation, relates to flight test telemetering wireless transmission methods and aims at solving the problem that both test data transmission efficiency and reliability cannot be guaranteed under the condition that quality of a wireless communication link dynamically changes. The flight test telemetering wireless transmission method includes that a mapping relationship between link quality and a code rate as well as a modulation scheme during reliable communication is acquired by verifying through a lot of tests; during actual communication, an airborne transceiver estimates channel quality at intervals, combines with the mapping relationship to determine the code rate and the modulation scheme, performs LDPC coding and modulation on telemetering data and transmits the telemetering data wirelessly; a ground station transceiver receives the telemetering data and performs demodulation and LDPC decoding to acquire a telemetering data estimation value. The flight test telemetering wireless transmission method is applied to the field of flight test telemetering wireless transmission.

Description

technical field [0001] The invention relates to a flight test telemetry wireless transmission method, in particular to a flight test telemetry wireless transmission method based on adaptive LDPC code modulation, which dynamically realizes high-efficiency and high-reliability transmission of telemetry data; it belongs to the field of flight test telemetry wireless transmission . Background technique [0002] Due to the requirements and characteristics of the flight test, it is necessary to collect the performance parameters of the flight test aircraft in all possible flight environments, and evaluate the flight performance. Therefore, during the flight test of the aircraft, the high-speed flight speed and the dynamically changing wireless communication distance make the quality of the wireless communication link between the airborne test network and the ground station change dynamically, which poses severe challenges to the wireless transmission of telemetry data. Challenge:...

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): H04L1/00H04L27/26H04L25/02
CPCH04L1/0009H04L25/024H04L25/026H04L27/2601
Inventor 罗清华彭宇王伟黄涛李瑞杰
Owner HARBIN INST OF 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

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