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Timing synchronization method, device and system

A timing synchronization and timing technology, applied in the direction of synchronization devices, time division multiplexing systems, transmission systems, etc., can solve problems such as poor autocorrelation and cross-correlation characteristics, low timing accuracy, and inability to accurately find the starting position of training symbols , to achieve the effect of reducing bit error rate and improving timing accuracy

Inactive Publication Date: 2017-10-20
SHEN ZHEN KUANG CHI HEZHONG TECH LTD
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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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  • Timing synchronization method, device and system
  • Timing synchronization method, device and system
  • Timing synchronization method, device and system

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Embodiment Construction

[0072] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the drawings and specific embodiments are only exemplary, and should not be construed as limiting the protection scope of the present invention.

[0073] In addition to being used in OvTDM and OvFDM systems, the technologies described in this paper can also be widely used in practical mobile communication systems, such as TD-LTE, TD-SCDMA and other systems, and can also be widely used in satellite communication, microwave line-of-sight communication In any wireless communication system such as , scattering communication, atmospheric optical communication, infrared communication and aquatic communication. The terms "network" and "system" are often used interchangeably.

[0074] The continuous development of mobile communications and the emergence of new services have put forward higher a...

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Abstract

The present invention provides a timing synchronization method comprising: performing the autocorrelation operation on a received signal with a local LAS code using a sliding window method to obtain a plurality of autocorrelation results, wherein the received signal is a time domain signal from a sending end and comprises a training sequence based on an LAS code; and determining an autocorrelation peak from the plurality of autocorrelation results, using a position of the autocorrelation peak as a start position of the LAS code, and using the start position of the LAS code to determine the timing of the received signal. By designing a LAS code training sequence in the communication system, the LAS code is used in the signal receiving process to perform timing synchronization. During timing synchronization with the LAS code, the positions of training symbols are precisely found by reasonably setting the threshold, so as to improve the system timing accuracy and lay a foundation for the subsequent carrier synchronization, channel estimation and decoding process, thereby reducing the system's bit error rate.

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. )network. [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-mentioned ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04L27/26H04W56/00
CPCH04J3/0638H04L27/2655H04L27/2657H04L27/2662H04W56/001
Inventor 不公告发明人
Owner SHEN ZHEN KUANG CHI HEZHONG TECH LTD