Timing synchronization method, device and system

Abstract

The invention provides a timing synchronization method. The timing synchronization method including performing self-correlation operation on received signals and local training codes by using a slide window method and acquiring a plurality of self-correlation results, wherein the received signals are time domain signals from a sending terminal and including a training sequence and data based on the training codes and the frequency width of the training sequence is greater than that of the data and the power spectrum density of the training sequence is lower than that of the data; and determining a self-correlation peak value from the multiple self-correlation results and using the position of the self-correlation peak value as a starting position of the training code which is used for determining the timing of the receiving signals. According to the invention, through designing an LAS code training sequence in a communication system, the LAS code is used for timing synchronization in signal receiving treatment. When the LAS codes are adopted for timing synchronization, the position of training symbols can be found accurately through setting threshold values reasonably. System timing precision is improved and a foundation is laid for subsequent carrier synchronization, channel estimation process and decoding process and error code rate of the system is reduced.

Description

technical field [0001] The present invention generally relates to a wireless communication system, and in particular to a timing synchronization method, device and system. Background technique [0002] Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and so on. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing available network resources. Examples of such multiple-access networks include Code Division Multiple Access (CDMA) networks, Time Division Multiple Access (TDMA) networks, Frequency Division Multiple Access (FDMA) networks, Orthogonal FDMA (OFDMA) networks, and Single-Carrier FDMA (SC-FDMA) networks. )The internet. [0003] With the ever-increasing demand for global mobile communications, the frequency resources of wireless communications are becoming increasingly tight. Therefore, in addition to the above-menti...

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Problems solved by technology

[0009] The purpose of the present invention is to use m-sequence for timing synchronization in the existing communication system, and the autocorrelation and cross-correlation characteristics are poor, resulting in relatively concentrated distribution of correlation peaks, unable to accurately find the starting position of the training symbol, resulting in low system timing accuracy Defects, provide a timing synchronization method and device to solve the above problems

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