Synchronization method and equipment for multi-carrier communication system

A multi-carrier communication and frame synchronization technology, applied in the field of communication, can solve the problems of not being able to fully exploit performance gains, and not being able to make full use of the full sequence information

Inactive Publication Date: 2009-04-15
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Description
  • Claims
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Problems solved by technology

Due to this repetition, the receiving end cannot make full use of the amount of information in the full sequence when performing symbol synchronization, and cannot fully explore the performance gains brought about by the relationship between the sequence values ​​of the synchronization sequence.

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  • Synchronization method and equipment for multi-carrier communication system
  • Synchronization method and equipment for multi-carrier communication system
  • Synchronization method and equipment for multi-carrier communication system

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Embodiment Construction

[0016] First, polynomial sequences are introduced. The polynomial sequence, that is, the sequence that can be definitely expressed by polynomials, has attracted more and more attention because of its ideal autocorrelation properties, and has been identified as a synchronous pilot sequence by many standardization organizations. Through the research on polynomial sequences, such as constant amplitude zero autocorrelation sequence (CAZAC) and generalized chirp sequence (GCL), it is found that not only the peak-to-average power ratio (PAPR) value is small, but the autocorrelation characteristics are good. It is a polynomial sequence, and its sequence value also has the characteristic that it can be definitely expressed by polynomials. By using this property, the system can remarkably improve the symbol synchronization estimation performance without losing the frequency offset estimation performance by only sending a non-repetitive polynomial sequence.

[0017] like figure 1 As s...

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Abstract

The invention relates to a synchronous method of a multi-carrier communication system and a device thereof. A non-repeated polynomial sequence synchronous symbol is sent out by a sending terminal. Polynomial conversion treatment is implemented on the received signal at a receiving end, and frame synchronization and frequency offset estimation are implemented. An estimated frequency offset value substitutes into an initial receiving signal for the compensation. Finally, the compensated receiving signal is interrelated with a local synchronous sequence of the synchronous symbol length to finish the symbol synchronization process. The non-repeated polynomial sequence is only sent out at the sending terminal as the synchronous symbol for the timing estimation and the frequency offset estimation. On the basis of not infecting the frame synchronization and the frequency offset synchronization, the timing synchronous precision of the symbol is greatly improved. And the synchronous method and the device thereof have the advantages of simple algorithm, low calculation complexity and good synchronous effect.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a multi-carrier communication system synchronization method and equipment. Background technique [0002] With the development of wireless communication technology, multi-carrier technology (especially Orthogonal Frequency Division Multiplexing technology) has been widely used not only in the field of broadcast digital audio and video because of its high spectrum utilization rate and effective resistance to multipath. , and has been introduced into the standards of wireless local area network and wireless metropolitan area network. In the Long Term Evolution (LTE) research initiated by the 3rd Generation Partnership Project (3GPP), Orthogonal Frequency Division Multiplexing (OFDM) has been adopted as a downlink multiple address mode. [0003] The synchronization process of the multi-carrier system includes frame synchronization, carrier synchronization and symbol s...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 张建华张炎炎张平刘毅张治夏明华
Owner BEIJING UNIV OF POSTS & TELECOMM
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