Based on Third-Order Correlation Synchronization Algorithm and FPGA Implementation in 5G System

LI Gui-yong; ZHANG Han-qing; WANG Yong-hang

doi:10.13756/j.gtxyj.2020.05.014

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Based on Third-Order Correlation Synchronization Algorithm and FPGA Implementation in 5G System

- Based on Third-Order Correlation Synchronization Algorithm and FPGA Implementation in 5G System
- Study on Optical communication Issue 5, Pages: 58-63(2020)
- 作者机构：
  
  重庆邮电大学通信与信息工程学院
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2020.05.014
  CLC： TN791;TN929.5
- Published：2020，
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[1]李贵勇,张翰卿,王永航.5G系统中基于三阶相关的同步算法及FPGA实现[J].光通信研究,2020(05):58-63.

LI Gui-yong, ZHANG Han-qing, WANG Yong-hang. Based on Third-Order Correlation Synchronization Algorithm and FPGA Implementation in 5G System. [J]. (5):58-63(2020)
[1]李贵勇,张翰卿,王永航.5G系统中基于三阶相关的同步算法及FPGA实现[J].光通信研究,2020(05):58-63. DOI： 10.13756/j.gtxyj.2020.05.014.

LI Gui-yong, ZHANG Han-qing, WANG Yong-hang. Based on Third-Order Correlation Synchronization Algorithm and FPGA Implementation in 5G System. [J]. (5):58-63(2020) DOI： 10.13756/j.gtxyj.2020.05.014.

摘要

5G物理层以帧为单位进行信息传递

帧同步点的准确与否将极大程度地影响后续信道的性能。针对现行同步算法检测同步点不准确的问题

文章分析了主同步信号（PSS）序列的三阶相关特性

根据此特性提出并实现了一种新型定时同步算法。仿真结果表明

当信噪比下降至-7 dB时

新算法检测同步点的准确率比传统算法提高了20%。新算法的空间复杂度与传统算法一致

时间复杂度的增加也在5G同步过程的允许范围之内。

Abstract

The 5G physical layer transmits information in frames. The accuracy of the frame synchronization point will greatly affect the performance of subsequent channels. Aiming at the problem that the current synchronization algorithm detects inaccurate synchronization points

this article analyzes the third-order correlation characteristic of the Primary Synchronization Signal（PSS） sequence

and proposes a new timing synchronization algorithm based on this characteristic. Simulation results show that when the signal-to-noise ratio drops to-7 dB

the accuracy of the proposed algorithm for detecting synchronization points is improved by 20% compared with the traditional algorithm. The space complexity of the new algorithm is consistent with the traditional algorithm

and the increase in time complexity is also within the allowable range of the 5G synchronization process.

关键词

5G下行同步定时跟踪三阶相关

Keywords

5Gdownlink synchronizationtiming trackingthird-order correlation

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