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Synchronizing method and system for multi-carrier system

A multi-carrier system and timing synchronization technology, applied in the field of communication, can solve the problems of inaccurate timing, unfavorable hardware implementation, and high computational complexity, and achieve the effect of reducing the amount of computation and computational complexity, and solving the problem of multi-path discrimination.

Inactive Publication Date: 2012-05-30
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the above method needs to calculate the relevant transportation point by point, its computational complexity is high, which is not conducive to hardware implementation.
In addition, because the timing synchronization will be affected by the multipath channel, the timing will be inaccurate

Method used

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  • Synchronizing method and system for multi-carrier system
  • Synchronizing method and system for multi-carrier system
  • Synchronizing method and system for multi-carrier system

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Embodiment Construction

[0025] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] figure 1 It is a method flow chart of an embodiment of a synchronization method for a multi-carrier system according to the present invention. The synchronization process is mainly completed at the receiving end, but at the sending end, it is necessary to use a polynomial sequence (as a training sequence, which is 2 sections, and the length is L ) and the modulated data sequence are multiplexed to finally obtain a signal frame with multiple sequences as synchronization symbols, and then send the signal frame. Such as figure 1 As shown, the synchronization process at the receiving end specifically includes:

[0027] A1, the data received on each receiving antenna ...

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Abstract

The invention discloses a synchronizing method and a system for a multi-carrier system. The method comprises the following steps: S1, processing signal frames received by each receiving antenna, and acquiring a connecting point position of n sections of same training sequences on a maximum path of the received signals or finding out a connecting point position of a training sequence on each receiving antenna; and S2, by using the connecting point position of n sections of the same training sequences on the maximum path of the received signals or the connecting point position of the training sequence found out on each receiving antenna, based on the adaptive threshold, estimating and acquiring an initial position of timing synchronization. The synchronizing technical scheme of the multi-carrier system of the invention greatly reduces the operation amount and the operation complexity of timing synchronization under the condition that the synchronizing performance can not be influenced, and the multi-path distinguishing coefficients of the multi-carrier system are calculated by using the signal to noise ratio of channels, thereby well solving the multi-path distinguishing problem in the synchronizing process.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a synchronization method and system for a multi-carrier system. 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, but also 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) technology has been adopted as a downlink multiple address mode. [0003] The synchronization process of multi-carrier system includes frame synchronization, carrier synchronization and symbol sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 张建华张平张志燕刘毅张炎炎刘宝玲
Owner BEIJING UNIV OF POSTS & TELECOMM
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