摘要
为加强学生对星地融合多体制通信波形与系统的认识,以DVB-S2X、WCDMA和5G NR波形为基础,设计并搭建基于Matlab图形界面的交互式星地融合多体制通信仿真实验平台。平台根据通信场景分为用户上、下行链路与馈电上、下行链路,每条链路级仿真包含编解码、调制解调、噪声与频偏产生、帧同步、定时同步、信道估计、频偏估计、跳频解跳、扩频解扩和传输业务选择等模块。各功能参数通过图形交互界面配置,将结果通过仿真波形展示。该平台不仅能帮助学生分析不同配置参数下的频偏估计性能,学习帧捕获与定时同步环路原理并掌握同步流程,还能促使学生理解星地融合通信中的关键技术。各功能模块留有统一接口,允许学生自己编写算法,进行通信链路功能仿真与测试。
To enhance students’understanding of integrated satellite-terrestrial multi-mode communication systems,an interactive experimental platform for integrated satellite-terrestrial multi-mode communication simulation has been designed and constructed with Matlab graphical interface.This platform is based on three types of waveforms:DVB-S2X,WCDMA,and 5G NR.According to actual communication scenarios,the platform is divided into user uplink and downlink as well as feeder uplink and downlink.Each simulation link includes modules such as channel encoding and decoding,modulation and demodulation,noise and frequency offset generation,frame synchronization,timing synchronization,channel estimation,frequency offset estimation,frequency hopping and de-hopping,(de)spreading spectrum,and transmission service selection.The parameters for each function can be configured through the graphical user interface,and the results are displayed with simulated waveforms.The platform not only helps students analyze the performance of frequency offset estimation under different configuration parameters,learn the principles of frame acquisition and timing synchronization loops,and master the downlink synchronization process,but also enables them to understand the key technologies and challenges in integrated satellite-terrestrial communications.Additionally,the platform provides uniform interfaces for each functional module,allowing students to develop their own algorithms to replace the existing modules for learning and testing the link functionalities.
作者
杨德伟
李念祖
何东轩
王华
YANG Dewei;LI Nianzu;HE Dongxuan;WANG Hua(Research Institute of Communication Technology,Beijing Institute of Technology,Beijing 100081,China)
出处
《实验室研究与探索》
北大核心
2025年第2期67-72,84,共7页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(62101306)。
关键词
星地融合
多体制波形
通信链路
仿真实验平台
space-ground integration
multi-mode waveform
communication link
simulation experiment platform
作者简介
杨德伟(1979-),男,山西忻州人,博士,副教授,主要研究方向为卫星调制解调技术。Tel.:010-68911841,E-mail:davidyang@bit.edu.cn。
