电讯技术
電訊技術
전신기술
TELECOMMUNICATIONS ENGINEERING
2014年
2期
224-230
,共7页
郑艺%王玉文%邓杰%尚小富
鄭藝%王玉文%鄧傑%尚小富
정예%왕옥문%산걸%상소부
高空平台站%空地链路%信道模型%QualNet仿真
高空平檯站%空地鏈路%信道模型%QualNet倣真
고공평태참%공지련로%신도모형%QualNet방진
high altitude platform station%air-ground link%channel model%QualNet simulation
高空平台站通信是实现中继通信的重要手段,其受大气效应及多径效应制约严重,但网络仿真器中缺少针对高空平台通信系统的准确信道模型,无法进行有效的仿真分析。为此,从分析ITU-R模型与Ricean模型出发,在此基础上改进QualNet仿真器内置的信道模型,使之基本实现对真实空地链路信道的近似模拟,将该信道模型应用于网络仿真中,并分析信道特性对空地链路性能的影响。最后,搭建了基于QualNet的半实物仿真平台,进一步增强了空地链路仿真的准确性和合理性。该信道模型及仿真平台对高空平台站通信系统的参数设计、性能分析具有重要意义。
高空平檯站通信是實現中繼通信的重要手段,其受大氣效應及多徑效應製約嚴重,但網絡倣真器中缺少針對高空平檯通信繫統的準確信道模型,無法進行有效的倣真分析。為此,從分析ITU-R模型與Ricean模型齣髮,在此基礎上改進QualNet倣真器內置的信道模型,使之基本實現對真實空地鏈路信道的近似模擬,將該信道模型應用于網絡倣真中,併分析信道特性對空地鏈路性能的影響。最後,搭建瞭基于QualNet的半實物倣真平檯,進一步增彊瞭空地鏈路倣真的準確性和閤理性。該信道模型及倣真平檯對高空平檯站通信繫統的參數設計、性能分析具有重要意義。
고공평태참통신시실현중계통신적중요수단,기수대기효응급다경효응제약엄중,단망락방진기중결소침대고공평태통신계통적준학신도모형,무법진행유효적방진분석。위차,종분석ITU-R모형여Ricean모형출발,재차기출상개진QualNet방진기내치적신도모형,사지기본실현대진실공지련로신도적근사모의,장해신도모형응용우망락방진중,병분석신도특성대공지련로성능적영향。최후,탑건료기우QualNet적반실물방진평태,진일보증강료공지련로방진적준학성화합이성。해신도모형급방진평태대고공평태참통신계통적삼수설계、성능분석구유중요의의。
High Altitude Platform station( HAPs) communication is an important way to realize relay com-munications. Its performance is seriously restricted by the atmospheric effect and multipath effect, howev-er, network simulators lack a realistic air-ground link channel model which would allow having accurate simulation,so it is difficult to perform effective simulation and analysis. According to the analysis of ITU-R model and Ricean model,the channel model in QualNet is improved for the purpose of realizing the ap-proximate simulation of the real air-ground link channel basically. The channel model is used in network simulation, and the influence of characteristics of channel on air-ground link performance is analyzed. Fi-nally, hardware in the loop( HITL) simulation platform is built based on QualNet to further enhance the accuracy and rationality of the air-ground link. The channel model and simulation platform are helpful for HAPs communication system parameters selection and performance evaluation.