Hybrid spread spectrum communication method and device based on long and short codes

A hybrid spread spectrum and communication method technology, which is applied in the field of satellite communication, can solve problems such as not being able to meet system requirements, achieve the effects of avoiding aggravated multiple access interference, increasing system user capacity, and reducing the probability of short message collisions

Active Publication Date: 2020-08-18
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the face of hundreds, thousands or even more important users of spacecraft and ground surface in the future, the current number of spread spectrum sequences can no longer meet the system requirements

Method used

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  • Hybrid spread spectrum communication method and device based on long and short codes
  • Hybrid spread spectrum communication method and device based on long and short codes
  • Hybrid spread spectrum communication method and device based on long and short codes

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Embodiment 1

[0038] In recent years, in the field of satellite communications, with the explosive growth of high-, medium-, and low-orbit spacecraft and important ground users, the network access of a large number of relay users has gradually become a technical problem that needs to be solved urgently in the field of relay satellite communications.

[0039] At present, the relay satellite communication system adopts the short message working system to transmit the user's access signaling information. In the face of hundreds, thousands or even more important relay users on the spacecraft and the surface in the future, the current number of spread spectrum sequences has exceeded It cannot meet the system requirements, and it is urgent to study a new spread spectrum system to solve the network access requirements of a large number of relay users. In addition, the low-orbit spacecraft needs full-time monitoring when it is in orbit. The low-orbit spacecraft periodically sends status short messag...

Embodiment 2

[0066] Corresponding to Embodiment 1 of the present invention, Embodiment 2 of the present invention also provides a hybrid spread spectrum communication device based on long and short codes, and the device includes:

[0067] The first spreading module is used for splicing link synchronization data and frame synchronization data into synchronization segment data, and performing spread spectrum processing on the synchronization segment data using a short code sequence;

[0068] The second spreading module is used for splicing frame header data, data field data and frame tail data into information segment data, and performing spread spectrum processing on the information segment data using a long code sequence;

[0069] The sending module is used for splicing the spread-spectrum synchronization segment data and the spread-spectrum information segment data before sending.

[0070] Applying the embodiment of the present invention, compared to the way in which the short code or the...

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Abstract

The embodiment of the invention provides a hybrid spread spectrum communication method and device based on long and short codes, and the method comprises the steps: splicing link synchronization dataand frame synchronization data into synchronization segment data, and carrying out the spread spectrum processing of the synchronization segment data through a short code sequence; splicing the frameheader data, the data domain data and the frame tail data into information segment data, and performing spread spectrum processing on the information segment data by using a long code sequence; and splicing the spread-spectrum synchronous segment data and the spread-spectrum information segment data, and sending the spliced synchronous segment data and spread-spectrum information segment data. Byapplying the method of the invention, the system user capacity is effectively improved.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a hybrid spread spectrum communication method based on long and short codes. Background technique [0002] In a communication system, according to the Shannon formula, it can be seen that when the channel capacity is constant, the channel bandwidth and the SNR are interchangeable, that is, increasing the bandwidth can reduce the requirement for the SNR and make the useful signal The power is close to or even submerged under the noise power. Based on the above principles, spread spectrum communication is to exchange for a lower signal-to-noise ratio by increasing bandwidth. When the signal-to-noise ratio cannot be improved, the bandwidth can be increased to achieve the purpose of increasing the channel capacity. Spread spectrum is a broadband technology. Since spread spectrum occupies a wider frequency band, it seems to waste limited frequency resources. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7073H04B1/7103H04J13/00
CPCH04B1/7073H04B1/7103H04J13/0029H04J13/0077
Inventor 张霄姚艳军王烁章仁飞任伟龙贺超张靖胡树楷张正宇赵宇峰
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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