湖北理工学院学报
湖北理工學院學報
호북리공학원학보
Journal of Huangshi Institute of Technology
2015年
1期
30-34
,共5页
无线信道%信道模型%自由空间传播模型%双线模型%自由空间传播-双线模型
無線信道%信道模型%自由空間傳播模型%雙線模型%自由空間傳播-雙線模型
무선신도%신도모형%자유공간전파모형%쌍선모형%자유공간전파-쌍선모형
wireless channel%channel model%free space propagation model%bilinear model%free space propa-gation-bilinear model
根据给定的无线信道通信的场景特点,建立了3种无线信道模型,即自由空间传播模型、双线模型和自由空间传播-双线模型。利用 MATLAB 对这3种模型接收信号强度分别进行仿真和分析,结果表明这3种模型接收信号强度曲线近似,但是当天线高度逐渐变高时,自由空间传播-双线模型接收信号强度曲线与自由空间模型、双线模型的曲线明显不同,它的波形会出现周期起伏,且在相同天线高度下不同地面反射系数对接收信号强度的影响很小。因此应选择自由空间传播-双线模型作为该场景的无线信道模型。
根據給定的無線信道通信的場景特點,建立瞭3種無線信道模型,即自由空間傳播模型、雙線模型和自由空間傳播-雙線模型。利用 MATLAB 對這3種模型接收信號彊度分彆進行倣真和分析,結果錶明這3種模型接收信號彊度麯線近似,但是噹天線高度逐漸變高時,自由空間傳播-雙線模型接收信號彊度麯線與自由空間模型、雙線模型的麯線明顯不同,它的波形會齣現週期起伏,且在相同天線高度下不同地麵反射繫數對接收信號彊度的影響很小。因此應選擇自由空間傳播-雙線模型作為該場景的無線信道模型。
근거급정적무선신도통신적장경특점,건립료3충무선신도모형,즉자유공간전파모형、쌍선모형화자유공간전파-쌍선모형。이용 MATLAB 대저3충모형접수신호강도분별진행방진화분석,결과표명저3충모형접수신호강도곡선근사,단시당천선고도축점변고시,자유공간전파-쌍선모형접수신호강도곡선여자유공간모형、쌍선모형적곡선명현불동,타적파형회출현주기기복,차재상동천선고도하불동지면반사계수대접수신호강도적영향흔소。인차응선택자유공간전파-쌍선모형작위해장경적무선신도모형。
According to the given scene of the wireless channel communication , such three kinds of wireless channel model as free space propagation model,bilinear model and free space propagation -bilinear model have been established .The received signal strength of the three model were simulated and analyzed by MAT-LAB.The results showed that the received signal strength curve of the three models were similar ,but when antenna height got higher,the received signal strength curve of free space propagation -bilinear model was significantly different from that of the free space model and bilinear model , its waveforms appeared periodic ups and downs.Under the same antenna height,different surface reflection coefficient exerted slight influence on received signal strength.Therefore free space propagation -bilinear model should be selected as the scene's wireless channel model.