摘要
为进一步研究自适应传输、功率控制和分集等毫米波频段星地链路的抗雨衰措施,提出了一种雨衰信道硬件在环路HIL(Hardware-in-the-loop)仿真系统的原理与实现方案。讨论了U.C.Fiebig等人提出的基于时间序列发生器原理的雨衰信道动态预测模型,设计并实现了基于MATLAB/SIMULINK软件与FPGA硬件相结合的雨衰信道硬件在环路实时仿真器。在此基础上,对不同降雨衰减条件下的MPSK/MQAM自适应调制抗雨衰措施及误码率性能进行了分析和比较,HIL仿真结果与理论上的预测分析是一致的。这种HIL雨衰信道仿真器可以用于检验卫星通信系统抗雨衰措施的有效性。
Real-time prediction of rain fading channel dynamic characteristics is necessary for fading mitigation techniques （FMT） of satellite-to-earth link in millimeter wave band, such as adaptive transmission, power control and diversity. The principle and implementation of a hardware-in-the-loop （HIL） simulation system of rain fading channel were introduced. Dynamic rain fading prediction model based on the time-series generator proposed by Fiebig was discussed firstly. A HIL real-time simulator of rain fading channels was schemed and realized via MATLAB/SIMULINK software and FPGA hardware. Furthermore, the BER performance of MPSK/MQAM adaptive modulation fading mitigation under various rain attenuation impairments was evaluated. And HIL simulation results are in accord with theoretic predictions. This HIL simulator of rain fading channel can be used to test the effectiveness of FMT in satellite communication systems.
出处
《解放军理工大学学报（自然科学版）》
EI
2008年第3期205-209,共5页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
国家部委预研基金资助项目(51421010103)
关键词
星地链路
雨衰信道
时间序列产生器
硬件在环路仿真
satellite-to-earth link
rain fading channel
time-series generator
HIL（hardware-in-the-loop） simulation
