基于多速率星地环路的SC-CFDMA上行符号同步方法

丁丹; 程乃平; 廖育荣

doi:10.11959/j.issn.1000-436x.2015298

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基于多速率星地环路的SC-CFDMA上行符号同步方法

学术论文 | 更新时间：2024-06-05

- 基于多速率星地环路的SC-CFDMA上行符号同步方法
- SC-CFDMA uplink symbol synchronization method based on multi-rate satellite-ground loop
- 通信学报 2015年36卷第Z1期页码：181-187
- 作者机构：
  
  装备学院光电装备系,北京 101416
- 作者简介：
  
  [ "丁丹（1980-），男，江苏南京人，装备学院博士生，主要研究方向为通信系统设计。" ]
  [ "程乃平（1963-），男，陕西扶风人，装备学院教授，主要研究方向为通信系统设计。" ]
  [ "廖育荣（1972-），男，四川绵竹人，装备学院光电装备系主任、教授，主要研究方向为测控、通信系统设计。" ]
- 基金信息：
  
  国家高技术研究发展计划（“863”计划）基金资助项目(2014AA7011071)
- DOI：10.11959/j.issn.1000-436x.2015298
  中图分类号： TN914.4
- 网络首发：2015-11，
  
  纸质出版：2015-11-25
- 稿件说明：
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丁丹, 程乃平, 廖育荣. 基于多速率星地环路的SC-CFDMA上行符号同步方法[J]. 通信学报, 2015,36(Z1):181-187.

Dan DING, Nai-ping CHENG, Yu-rong LIAO. SC-CFDMA uplink symbol synchronization method based on multi-rate satellite-ground loop[J]. Journal on Communications, 2015, 36(Z1): 181-187.
丁丹, 程乃平, 廖育荣. 基于多速率星地环路的SC-CFDMA上行符号同步方法[J]. 通信学报, 2015,36(Z1):181-187. DOI： 10.11959/j.issn.1000-436x.2015298.

Dan DING, Nai-ping CHENG, Yu-rong LIAO. SC-CFDMA uplink symbol synchronization method based on multi-rate satellite-ground loop[J]. Journal on Communications, 2015, 36(Z1): 181-187. DOI： 10.11959/j.issn.1000-436x.2015298.

摘要

单载波码分与频分多址(SC-CFDMA，single carrier code and frequency division multiple access)体制要求符号定时精确至码片级，同步难度高于普通体制。为此提出一种多速率星地闭环同步方法，通过适当提升部分环路元件的控制速率，在环路非采样点上延续闭环控制，从而提高对用户运动速度的适应能力。推导了控制速率提升后相关元件及环路的状态空间方程，进行了Matlab软件仿真，结果表明，即使在高轨卫星通信场景下，所提方法也能将多个超音速用户之间的SC-CFDMA上行符号定时偏差同步至码片宽度内，保证链路畅通。

Abstract

SC-CFDMA(single carrier code and frequency division multiple access) system

whose synchronization is more difficult than that of common orthogonal multi-carrier systems

requires the symbol synchronization to achieve a chip-level precision.Therefore

a synchronization method based on multi-rate satellite-ground loop is proposed.This method extends the closed-loop control on the non-sampling points of the loop through raising the control rates of some loop components

so as to promote the adaptability to users with different speeds.Besides

the state-space equations of the loop and related components are derived.The Matlab simulation results show that

even in GEO satellite system

the synchronization method proposed can adjust the SC-CFDMA uplink symbol timing errors between several supersonic users within chip-level duration

thus providing stable communication.

关键词

Keywords

references

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