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Timing synchronization method and device

A technology of timing synchronization and main synchronization sequence, which is applied in the field of electronic information, can solve the problems of reducing the reliability of timing synchronization and false synchronization, and achieve the effect of avoiding false synchronization and improving reliability

Inactive Publication Date: 2019-09-06
STATE GRID INFORMATION & TELECOMM GRP
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, for terminals at the edge of the cell, if there is a large interference nearby, the method of determining the timing synchronization position using the correlation value method will cause missynchronization, thereby reducing the reliability of timing synchronization

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Embodiment Construction

[0052] A timing synchronization method and device provided in the present application are applied to an LTE-G230MHz power wireless private network system.

[0053] The purpose of this application is to: in the LTE-G230MHz power wireless private network system, effectively eliminate large signal interference and avoid false synchronization, thereby improving the reliability of timing synchronization.

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0055] A method for generating a primary synchronization sequence provided in an e...

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Abstract

The invention discloses a timing synchronization method and device. Th method includes: performing sliding cross-correlation on the received time domain data and a pre-stored main synchronization sequence; obtaining a correlation value sequence corresponding to each pre-stored main synchronization sequence; directly mapping the pre-stored main synchronization sequence into a time domain sequence from a ZC sequence, wherein the main synchronization sequence generated in this way has better autocorrelation and cross-correlation characteristics in the time domain; secondly, dividing the correlation value sequence into a plurality of segmented sequences, calculating a segmented peak-to-average ratio of each segmented sequence, and finally determining a synchronous index position as a timing synchronous position according to the segmented peak-to-average ratio, namely, the synchronous index position is an index position of a maximum correlation value in the synchronous segmented sequence, and the synchronous segmented sequence is the segmented sequence with the maximum segmented peak-to-average ratio. According to the timing synchronization method provided by the invention, the correlation value sequence is solved, and the interference signal is filtered out by combining the calculation of the peak-to-average ratio, so that the timing synchronization position is determined, the error synchronization caused by overlarge interference is avoided, and the reliability of the timing synchronization is improved.

Description

technical field [0001] The present application relates to the field of electronic information, in particular to a timing synchronization method and device. Background technique [0002] In the LTE-G230MHz power wireless private network system, a 25kHz physical channel is used in the frequency domain to define a sub-band, and each sub-band contains 11 2KHz sub-carriers. Among them, the sub-bands are divided into synchronous sub-bands, broadcasting A subband and a service subband, the synchronization subband carries a synchronization signal and is used to send a PSS (Primary Synchronization Signal, primary synchronization sequence) and an SSS (Secondary Synchronization Signal, secondary synchronization sequence). At present, the common timing synchronization method of the wireless power private network system is the correlation value method, that is, the cross-correlation operation between the locally stored PSS and the received signal is used to obtain the maximum value, and ...

Claims

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Application Information

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IPC IPC(8): H04W56/00
CPCH04W56/00H04W56/003
Inventor 孙孝波方梦然张春玲白杰李金安王文华
Owner STATE GRID INFORMATION & TELECOMM GRP
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