无人机地空链路信道特性与宽带数据传输  

Channel Characteristics of UAV Ground-to-air Datalink and Broadband Data Transmission

作　　者：高保生[1] 朱良彬[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2011年第9期4-6,共3页Radio Engineering

摘　　要：无人机地空链路数据传输存在多径衰落的影响。详细分析了无人机在滑行、起降和巡航3种状态下地空信道的传输特性。针对滑行、起降阶段多径时延大、存在频率选择性衰落的问题,提出了宽带数据传输技术——单载波频域均衡(SC-FDE)和正交频分复用(OFDM),并对SC-FDE进行了性能仿真。仿真结果表明,SC-FDE可以有效解决无人机滑行、起降阶段的多径衰落影响,提高宽带数据传输质量。The multipath fading exists during the Ground-to-air data transmission of UAV.This paper analyzes the characteristics of the ground-to-air communication at taxiing scenario,arrival and takeoff scenario and en-route scenario.Aiming at the multipath fading caused serious frequency selective fading at taxiing scenario,arrival and takeoff scenario,broadband transmission scheme is given,such as SC-FDE and OFDM.The analysis and simulation results of SC-FDE demonstrate that it can eliminate the multipath fading influence at the taxiing scenario,arrival and takeoff scenario of the UAV system and the data transmission performance is improved.

关 键 词：数据链路 多径时延 频率选择性衰落 SC-FDE OFDM 

分 类 号：TN911[电子电信—通信与信息系统]