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A carrier synchronization method and device for satellite communication

A carrier synchronization, satellite communication technology, applied in the field of communication, can solve the problem of small phase-locked loop bandwidth and so on

Active Publication Date: 2020-09-15
武汉船舶通信研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most common method of carrier synchronization is to use phase-locked loop technology, but due to the small bandwidth of the phase-locked loop, it is not conducive to capturing the carrier of satellite communication with large frequency deviation

Method used

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  • A carrier synchronization method and device for satellite communication
  • A carrier synchronization method and device for satellite communication
  • A carrier synchronization method and device for satellite communication

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Embodiment Construction

[0071] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0072] figure 1 It is a flow chart of a carrier synchronization method for satellite communication provided by an embodiment of the present invention, for example, it is applied to the S-band of satellite communication, see figure 1 , the method includes:

[0073] Step 100: The transmitting end inserts a Unique Word (UW) symbol after each symbol in the signal to be transmitted, then modulates the signal to be transmitted after the UW symbol is inserted, and transmits the modulated signal to be transmitted.

[0074] In the embodiment of the present invention, the transmitting end performs quadrature phase shift keying (Quadrature Phase Shift Keyin, QPSK) constellation mapping on the signal to be transmitted after inserting the UW symbo...

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Abstract

The invention discloses a carrier synchronization method and device for satellite communication and belongs to the field of communication. The method comprises the steps of receiving a signal sent bya sending end, thereby obtaining a received signal, wherein the received signal is sent after the sending end inserts a unique word (UW) symbol into each symbol in a to-be-sent signal and modulates the to-be-sent signal in which the UW symbols are inserted; carrying out conjugate multiplication on each symbol in the received signal and the symbol behind each symbol, thereby obtain a first signal sequence; carrying out sliding correlation on the first signal sequence and a preset local matching sequence to obtain a correlation sequence; determining the UW symbols of the received signal align with a local UW sequence completely or not; determining a synchronization position according to a position corresponding the maximum correlation peak of the correlation sequence when the UW symbols of the received signal align with the local UW sequence completely; determining frequency offset and phase offset of the received signal and rectifying the received signal; and inputting the rectified received signal into a Costas ring.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a carrier synchronization method and device for satellite communication. Background technique [0002] In recent years, satellite communication has played an important role in wireless communication due to its wide coverage, strong broadcasting capability, freedom from various geographical and terrain constraints, flexible networking, and fast construction speed. important means of communication. [0003] In the satellite communication system, the Doppler frequency deviation caused by the relative motion between the ground receiver and the satellite is large, which has a great impact on the carrier synchronization and tracking performance. The most common method of carrier synchronization is to use phase-locked loop technology, but because the bandwidth of the phase-locked loop is small, it is not conducive to capturing the carrier of satellite communication with large fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L27/38H04L27/00H04L7/027
CPCH04L7/0274H04L27/0014H04L27/2657H04L27/2695H04L27/3854H04L2027/0026
Inventor 徐露陈绍银胡刚
Owner 武汉船舶通信研究所
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