无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2015年
1期
5-8
,共4页
可见光通信%光线追踪%脉冲响应%朗伯模型
可見光通信%光線追蹤%脈遲響應%朗伯模型
가견광통신%광선추종%맥충향응%랑백모형
visible light communication%ray-tracing algorithm%impulse response%Lambertian model
可见光通信是一种新兴的无线通信方式。介绍了基于朗伯辐射模型的光线追踪算法，该算法可以精确地模拟每个光子的运动轨迹和接收过程。论述了室内可见光通信系统6种基本链路形式，并对其信道脉冲响应进行了仿真，分析了脉冲响应的成分组成和幅值特性。仿真结果表明，光源所发出的光子只有0?1％～7?2％被接收机接收，视距链路中直射光子所携带的功率占接收总功率的98?93％～99?8％，非视距链路中一次反射的光子所携带的功率占接收总功率的85?45％～98?08％。
可見光通信是一種新興的無線通信方式。介紹瞭基于朗伯輻射模型的光線追蹤算法，該算法可以精確地模擬每箇光子的運動軌跡和接收過程。論述瞭室內可見光通信繫統6種基本鏈路形式，併對其信道脈遲響應進行瞭倣真，分析瞭脈遲響應的成分組成和幅值特性。倣真結果錶明，光源所髮齣的光子隻有0?1％～7?2％被接收機接收，視距鏈路中直射光子所攜帶的功率佔接收總功率的98?93％～99?8％，非視距鏈路中一次反射的光子所攜帶的功率佔接收總功率的85?45％～98?08％。
가견광통신시일충신흥적무선통신방식。개소료기우랑백복사모형적광선추종산법，해산법가이정학지모의매개광자적운동궤적화접수과정。논술료실내가견광통신계통6충기본련로형식，병대기신도맥충향응진행료방진，분석료맥충향응적성분조성화폭치특성。방진결과표명，광원소발출적광자지유0?1％～7?2％피접수궤접수，시거련로중직사광자소휴대적공솔점접수총공솔적98?93％～99?8％，비시거련로중일차반사적광자소휴대적공솔점접수총공솔적85?45％～98?08％。
Visible light communication is an emerging wireless communication method.The paper presents a ray?tracing algorithm based on Lambertian model,which can accurately simulate the moving path and receiving process of each photon.Then six types of basic links of indoor visible light communication system are presented,the impulse response of each link is simulated,and the component and amplitude of the impulse response are analyzed.The simulations show that only 0?1%~7?2%photons can be received by the receiver. The power carried by the direct photons is 98?93%~99?8% of the total power carried by the received photons in the line?of?sight link, and the power carried by the once?reflected photons is 85?45%~98?08% of the total power carried by the received photons in the non?line?of?sight link.
