A Carrier Synchronization Method Based on Superposition of Training Sequence in Bit Domain

A training sequence and carrier synchronization technology, applied in the field of digital communication, can solve the problems of high algorithm complexity and small estimation range, and achieve the effect of improving estimation accuracy and enhancing anti-interception capability.

Active Publication Date: 2022-05-31
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combined method of frequency offset and channel estimation using superimposed training sequences can realize carrier frequency offset estimation without sacrificing bandwidth resources. Although this algorithm improves resource utilization, the algorithm that uses the specific vector of the matrix to solve High complexity, small estimated range

Method used

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  • A Carrier Synchronization Method Based on Superposition of Training Sequence in Bit Domain
  • A Carrier Synchronization Method Based on Superposition of Training Sequence in Bit Domain
  • A Carrier Synchronization Method Based on Superposition of Training Sequence in Bit Domain

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Embodiment approach

[0063]

[0066]

[0067] wherein, and 1>w(1)>w(2)>...w(L)>0;

[0069]

[0071]

[0075]

[0078]

[0080]

specific Embodiment

[0084] The implementation process of the carrier synchronization method based on the bit-domain superimposed training sequence is exemplified.

[0095]

[0098]

[0099] wherein, and 1>w(1)>w(2)>...w(L)>0;

[0101]

[0103]

[0105] FIG. 5 is the frequency offset capture range of the coarse synchronization algorithm of the scheme of the present invention. In the coarse synchronization algorithm, the variable parameter is the maximum phase

[0108]

[0111]

[0113]

[0115] FIG. 8 is the frequency offset capture range of the fine synchronization method of the solution of the present invention. The control variable of the fine synchronization algorithm is the data block

[0116] FIG. 11 and FIG. 12 are the root mean square error curves of the carrier wave synchronization scheme for the AWGN channel and the Rayleigh fading channel.

[0117] FIG. 13 is a bit error rate performance curve diagram of the system of the solution of the present invention under different transmission schem...

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Abstract

The invention discloses a carrier synchronization method based on bit field superposition training sequence. The present invention proposes a carrier synchronization method with strong anti-interference ability aiming at the signal design method of the superposition of the sparse code word and the pseudo-random sequence. In this method, the hidden pseudo-random sequence is used to estimate the frequency offset at the receiving end, and the combination of coarse synchronization and fine synchronization is used to improve the estimation accuracy. Finally, sparse decoding and channel decoding are performed on the restored sequence. The carrier synchronization method proposed by the present invention based on the superposition of sparse coding codewords and pseudo-random sequences can ensure accurate estimation of carrier frequency offset without occupying additional bandwidth resources, and realize reliable transmission of information in combination with channel coding; In addition, the superposition of pseudo-random sequences can enhance the anti-interception ability of burst signals; when there is a fragment loss in the data frame, the remaining hidden pseudo-random sequences can still be used to estimate the frequency offset.

Description

A Carrier Synchronization Method Based on Bit Domain Superposition Training Sequence technical field [0001] The present invention relates to the field of digital communication, in particular to a carrier synchronization method based on bit-domain superimposed training sequences. Background technique [0002] In the information age, wireless communication transmission faces higher challenges. With the development of Internet data services, People's demand for wireless communication is also getting higher and higher, and wireless communication, especially burst communication, is developing rapidly. burst communication It is a special communication mechanism, the signal duration is short, the transmission interval is long, and the communication system transmits a large amount of data in a short time. This can effectively reduce the probability of information interception and interference. Compared with conventional communication systems, burst communication systems Has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L27/00
CPCH04L27/2657H04L27/0014H04L2027/0026Y02D30/70
Inventor 陈为刚李姗姗韩昌彩
Owner TIANJIN UNIV
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