摘要
针对短波通信在不同通信距离具有完全不同的传播机制问题,综合考虑短波信号受电离层反射、地面吸收等环境因素的影响,建立了一个包含传播损耗、阴影衰落、多径衰落和多径时延的短波分段信道模型。在此基础上,根据短波信号在天波段和地波段的传播特性,分别研究了信道模型在相应传播距离内的传播损耗参数计算方法,以及短波电台无法正常通信的盲区范围。数值仿真结果表明,本文损耗预测结果能够体现不同传播模式下的变化情况,并与ITU实测结果基本吻合。该结论可为短波通信系统性能评估、抗干扰能力预测和通信方案优化等提供理论参考。
The short-wave radio communications with different distances have completely different communication mechanism.By considering the influence of ionospheric reflection,ground absorption,and other environment factors,a segment-based short-wave multipath channel model is developed.The proposed model takes into account the propagation path loss,shadow fading,multipath fading and multipath delay.Meanwhile,by considering the propagation characteristics of sky wave and ground wave,a prediction method for the propagation loss of the proposed short-wave channel model is proposed and the calculation method of blind range in which the short-wave radios cannot work properly is also analyzed.Numerical simulations show that the proposed prediction method can demonstrate the variation of propagation loss for different propagation modes and the predicted results agree well with the measurement data of ITU.These results can provide theoretical foundations for performance evaluation,anti-jamming ability prediction and system optimization of short-wave communications.
作者
祝夢卿
朱秋明
张宁
王成华
王梅
Zhu Mengqing;Zhu Qiuming;Zhang Ning;Wang Chenghua;Wang Mei(Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space,Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;National Radio Monitoring Center Urumqi Monitoring Station,Urumqi 831400,China)
出处
《航空兵器》
CSCD
北大核心
2020年第1期71-75,共5页
Aero Weaponry
基金
国家重大科学仪器设备开发专项(61827801)
教育部产学合作协同育人项目(美国国家仪器公司201802016036)
工业和信息化部党的政治建设研究中心2019年度重大课题(19GZY112)
关键词
短波通信
信道模型
天波
地波
传播路径损耗
short-wave communication
channel model
sky wave
ground wave
propagation path loss
