Deep-space-communication-oriented cross-layer joint file transmission method and system

A technology of file transmission and deep space communication, which is applied in the field of deep space communication, can solve problems such as structural redundancy, complex implementation, and lack of thorough improvement in data transmission, and achieve the effects of good performance, improved throughput, and improved performance
CN104683065AInactive Publication Date: 2015-06-03HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
2 Cites 6 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
Publication Date
2015-06-03
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention is applicable to the field of deep space communication, and provides a deep-space-communication-oriented cross-layer joint file transmission method. An image is compressed by adopting a CS (chirp scaling) algorithm in the transmission process of the image, so that the image can be jointly optimized with the Spinal code of a bottom layer and then is transmitted; a cross-layer joint transmission mechanism refers to that the CS image compression of an application layer, the CS erasure correction of a transmission layer and the Spinal code of a data link layer / physical layer are jointly optimized and a transmission mechanism is designed in combination with an LTP (Licklider transmission protocol), and after finishing sending certain data, a sending end determines a symbolic number to be sent at a next moment through Markov prediction and feedback information without waiting for feedback. After receiving the feedback, the sending end pauses sending the data, processes the feedback, and additionally sends the symbolic number aiming at a coding block with an error, and the additionally sent symbolic number is decoded together with the symbolic number sent before. On the premise that certain reliability is guaranteed, the effectiveness of a system is improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of deep space communication, in particular to an image data transmission method. Background technique

[0002] Deep space communication has the characteristics of long distance, long delay, and intermittent link, which makes the contradictory relationship between the reliability and effectiveness of deep space communication more prominent. For this problem, the traditional solutions include increasing the receiving / transmitting antenna size, increasing the carrier frequency, increasing the transmitting power, controlling the noise level of the receiving system, etc., but the method based on physical quantity gain is ultimately unsustainable. Efficient channel coding and reasonable transmission mechanism play an important role in deep space communication.

[0003] In channel coding, existing high-performance coding techniques such as Turbo codes and LDPC codes perform well under medium SNR conditions, but are still un...

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