Data transmission method based on AOS encoding

A data transmission method and data technology, applied in the field of communications, can solve problems such as uncollected data, no explanation or report found, wrong type of format, etc., so as to improve the efficiency of effective data transmission, reduce the phenomenon of data dissatisfaction, and prevent errors. Effect

Active Publication Date: 2010-06-09
XIAN INSTITUE OF SPACE RADIO TECH
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is completely in accordance with the AOS (Advanced Orbiting Systems) format coding design standard suggested by CCSDS, the VCDU data unit area is not used in segments, and the length of the data unit area can only be designed to be divisible by the time length of the forward data of one input data form; when there is a wide range of forward and reverse time changes, the phenomenon that the data in the AOS transmission format is not filled with enough frames occurs frequently because it cannot be divisible by all. This phenomenon shows that the AOS frame set according to the fixed data length only The transmission efficiency of individual regular data blocks that are evenly divisible is high, and the transmission efficiency of non-...

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
  • Data transmission method based on AOS encoding
  • Data transmission method based on AOS encoding
  • Data transmission method based on AOS encoding

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0086] The AOS formatting program performs continuous format generation according to the working clock frequency. Receive external input data during the period, when the current valid data arrives, first fill the data into the La data block of the VCDU data area, and at the same time, the la variable counts. When the length of L bytes is satisfied, the AOS frame format is generated and an error control field is formed Data, one frame of AOS format ends; if the la variable does not satisfy L, the forward data ends, the inverse data starts, and invalid data is written to the Lb data block of the VCDU data area in the subsequent time, and the lb variable counts at the same time, when the L byte is satisfied After the length, the AOS frame format generates and forms the error control field data, and the AOS format of one frame ends; if the backtracking is short, la+lb is less than L, the backtracking data ends, a new forward journey starts, and a new forward journey is written in t...

example 2

[0089] The AOS formatting program performs continuous format generation according to the working clock frequency. Receive external input data during the period, when the current inverse invalid data arrives, first fill the data into the Lb data block of the VCDU data area, and set the la variable to 0 at the same time, and the lb variable counts. When the length of L bytes is satisfied, the AOS frame format Generate and form the error control field data, and the AOS format of one frame ends; if the lb variable does not satisfy L, the reverse data ends, the forward data starts, and the subsequent time writes valid data to the L-La-Lb data block of the VCDU data area, At the same time, the L-la-lb variable counts until it is 0, the AOS frame format is generated and formed, and one frame of AOS format ends.

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 a data transmission method based on the AOS encoding. Based on the CCSDS-suggested AOS-formatted design standard, an AOS-formatted VCDU data field is designed in a way that the data field can be divided into sections for use, compiled into a VHDL hardware logic descriptive language, and downloaded to a programmable device FPGA, and the AOS-formatted processing and output of the SAR data stream by hardware such as the FPGA, FIFO and the like is realized. By using a method of dividing the VCDU data unit into sections, when processing the current AOS-formatted frame, the valid data area at the formatted tail can continue reading in the formatted frame because new trace data appears in advance due to the short retrace time of the input data, thereby improving the transmission efficiency of the valid data of the frame, greatly reducing the frame-insufficient phenomena of the data, and being especially suitable for the situations of the trace and retrace wide-range change of the data before and after inputting. The invention effectively inhibits the formatted frame from being filled with an insufficient frame of the valid data, ensures the AOS-formatted efficiency, and enables the data processing to work at a more stable speed all the time. The invention can adapt to the random change of the trace and the retrace of the input data and prevent the formatting mistake.

Description

technical field [0001] The invention relates to a data transmission method, in particular to an AOS coding-based data transmission method, and belongs to the technical field of communication. Background technique [0002] For the load input format data containing forward and reverse journeys, the time length of forward and reverse journeys can be continuously changed in a large range. Forward data is valid data, and reverse data is invalid data. If it is completely in accordance with the AOS (Advanced Orbiting Systems) format coding design standard suggested by CCSDS, the VCDU data unit area is not used in segments, and the length of the data unit area can only be designed to be divisible by the time length of the forward data of one input data form; when there is a wide range of forward and reverse time changes, the phenomenon that the data in the AOS transmission format is not filled with enough frames occurs frequently because it cannot be divisible by all. This phenomen...

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): H04B1/66
Inventor 杨旭朱红张文凯张景阳
Owner XIAN INSTITUE OF SPACE RADIO TECH
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