无线紫外光通信脉冲展宽测距方法
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摘要
为提高短距离无线紫外光测距精度,依据无线紫外光通信系统脉冲响应宽度随通信距离增大而增大的原理,给出无线紫外光通信脉冲展宽测距法。基于蒙特卡罗(MC,Monte Carlo)多次散射仿真模型,研究晴天经3次散射无线紫外光通信系统的脉冲响应,给出脉冲响应的表达式;研究不同收发仰角条件下,系统脉冲响应的半峰全宽、10%的脉冲宽度与通信距离的关系,给出脉冲展宽测距公式,并与测距实验结果作对比。结果表明,当收发仰角小于等于20°,有效测距为0～50 m时,半峰全宽测距公式平均测距误差小于2.8 m,10%脉冲宽度测距公式平均测距误差小于1.5 m。
In order to improve the accuracy of short-range wireless ultraviolet distance measurement, based on the principle that the pulse response width of wireless ultraviolet communication system increases with the communication distance, the wireless ultraviolet communication pulse broadening ranging method was proposed.Based on Monte Carlo multiple scattering simulation model, the impulse response of wireless ultraviolet communication system after three scatterings in clear weather was studied, and the expression of impulse response was given. The relationship between the half peak and full width, 10% of the pulse width of the system′s impulse response and the communication distance under different elevations of transmitter and receiver are studied, then the formula of pulse broadening ranging was given and compared with the experimental results.The results show that the average ranging error of the half-peak full-width ranging formula is less than 2.8 m, and the average ranging error of the 10% pulse width ranging formula is less than 1.5 m when the transmitting and receiving elevation angle is less than or equal to 20° and the effective ranging is 0～50 m.
In order to improve the accuracy of short-range wireless ultraviolet distance measurement, based on the principle that the pulse response width of wireless ultraviolet communication system increases with the communication distance, the wireless ultraviolet communication pulse broadening ranging method was proposed.Based on Monte Carlo multiple scattering simulation model, the impulse response of wireless ultraviolet communication system after three scatterings in clear weather was studied, and the expression of impulse response was given. The relationship between the half peak and full width, 10% of the pulse width of the system′s impulse response and the communication distance under different elevations of transmitter and receiver are studied, then the formula of pulse broadening ranging was given and compared with the experimental results.The results show that the average ranging error of the half-peak full-width ranging formula is less than 2.8 m, and the average ranging error of the 10% pulse width ranging formula is less than 1.5 m when the transmitting and receiving elevation angle is less than or equal to 20° and the effective ranging is 0～50 m.
引文
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[16] DING H P,CHEN G,MAJUMDAR A K,et al.Modeling of non-line-of-sight ultraviolet scattering channels for communication[J].IEEE Journal on Selected Areas in Communications,2009,27(9):1535-1544.
[17] 何华,柯熙政.紫外光通信中的Mie散射机制[J].应用科学学报,2012,30(3):245-250.HE H,KE X Z.Mie scattering in ultraviolet communication[J].Journal of Applied Sciences,2012,30(3):245-250.(in Chinese)
[18] XU Z Y,DING H P,SADLER B M,et al.Analytical performance study of solar blind non-line-of-sight ultraviolet short-range communication links[J].Optics Letters,2008,33(16):1860-1862.
[19] 宋鹏,王建余,熊扬宇,等.非直视紫外光非共面通信系统性能分析[J].西安工程大学学报,2015,29(4):415-419.SONG P,WANG J Y,XIONG Y Y,et al.Performance analysis of non-line-of-sight ultraviolet noncoplanar communication[J].Journal of Xi′an Polytechnic University,2015,29(4):415-419.(in Chinese)
[20] 王建余,宋晓梅,宋鹏,等.大气湍流对无线紫外光通信的影响[J].西安工程大学学报,2016,30(3):322-326.WANG J Y,SONG X M,SONG P,et al.The effect of atmospheric turbulence on wireless ultraviolet communication[J].Journal of Xi′an Polytechnic University,2016,30(3):322-326.(in Chinese)
[2] YUAN R Z,MA J S.Review of ultraviolet non-line-of-sight communication[J].China Communications,2016,13(6):63-75.
[3] 徐正元.无线光通信的机遇与挑战[C]//中国电子学会.2015年全国微波毫米波会议论文集.上海:2015:1744-1747.XU Z Y.Opportunities and challenges of wireless optical communication[C]//China Electronics Society.National Microwave Millimeter Wave Conference Proceedings,2015:1744-1747.(in Chinese)
[4] REILLY D M,WARDE C.Temporal characteristics of single-scatter radiation[J].Journal of the Optical Society of America,1979,69(3):464-470.
[5] LUETTGEN M R,SHAPIRO J H,REILLY D M.Non-line-of-sight single-scatter propagation model[J].Journal of the Optical Society of America A,1991,8(12):1964-1972.
[6] ZUO Y,XIAO H F,WU J,et al.A single-scatter path loss model for non-line-of-sight ultraviolet channels[J].Optics Express,2012,20(9):10359-10369.
[7] WANG L J,XU Z R,SADLER B M.An approximate closed-form link loss model for non-line-of-sight ultraviolet communication in noncoplanar geometry[J].Optics Letters,2011,36(7):1224-1226.
[8] ZUO Y,XIAO H F,WU J,et al.Closed-form path loss model of non-line-of-sight ultraviolet single-scatter propagation[J].Optics Letters,2013,38(12):2116-2118.
[9] 宋鹏,柯熙政,熊扬宇,等.非直视紫外光在非共面通信系统中的脉冲展宽效应[J].光学学报,2016,36(11):1106004(1-10).SONG P,KE X Z,XIONG Y Y,et al.Pulse broadening effect of non-line-of-sight ultraviolet in noncoplanar communication system[J].Acta Optica Sinica,2016,36(11):1106004(1-10).(in Chinese)
[10] 唐义,倪国强,蓝天,等.“日盲”紫外光通信系统传输距离的仿真计算[J].光学技术,2007,33(1):27-30.TANG Y,NI G Q,LAN T,et al.Simulation and evaluation of transmission distance in solar-blind UV communication systems[J].Optical Technique,2007,33(1):27-30.(in Chinese)
[11] 何华,柯熙政,赵太飞,等.无线 “日盲” 紫外光网格网中的定位研究[J].激光技术,2010,34(5):607-610.HE H,KE X Z,ZHAO T F,et al.Research of position in the wireless “solar-blind” ultraviolet mesh network[J].Laser Technology,2010,34(5):607-610.(in Chinese)
[12] 赵太飞,余叙叙,包鹤,等.无线日盲紫外光测距定位方法[J].光学精密工程,2017,25(9):2324-2332.ZHAO T F,YU X X,BAO H,et al.Ranging and positioning method using wireless solar blind ultraviolet[J].Optics and Precision Engineering,2017,25(9):2324-2332.(in Chinese)
[13] CHEN G,XU Z Y,SADLER B M.Experimental demonstration of ultraviolet pulse broadening in short-range non-line-of-sight communication channels[J].Optics Express,2010,18(10):10500-10509.
[14] 柯熙政.紫外光自组织网络理论[M].北京:科学出版社,2011:36-39.KE X Z.UV self-organizing network theory[M].Beijing:Science Press,2011:36-39.(in Chinese)
[15] 何华.无线紫外光通信及其组网的关键技术研究[D].西安:西安理工大学,2011:15-28.HE H.Study on the key technology of wireless ultraviolet communication and ultraviolet networking[D].Xi′an:Xi′an University of Technology,2011:15-28.(in Chinese)
[16] DING H P,CHEN G,MAJUMDAR A K,et al.Modeling of non-line-of-sight ultraviolet scattering channels for communication[J].IEEE Journal on Selected Areas in Communications,2009,27(9):1535-1544.
[17] 何华,柯熙政.紫外光通信中的Mie散射机制[J].应用科学学报,2012,30(3):245-250.HE H,KE X Z.Mie scattering in ultraviolet communication[J].Journal of Applied Sciences,2012,30(3):245-250.(in Chinese)
[18] XU Z Y,DING H P,SADLER B M,et al.Analytical performance study of solar blind non-line-of-sight ultraviolet short-range communication links[J].Optics Letters,2008,33(16):1860-1862.
[19] 宋鹏,王建余,熊扬宇,等.非直视紫外光非共面通信系统性能分析[J].西安工程大学学报,2015,29(4):415-419.SONG P,WANG J Y,XIONG Y Y,et al.Performance analysis of non-line-of-sight ultraviolet noncoplanar communication[J].Journal of Xi′an Polytechnic University,2015,29(4):415-419.(in Chinese)
[20] 王建余,宋晓梅,宋鹏,等.大气湍流对无线紫外光通信的影响[J].西安工程大学学报,2016,30(3):322-326.WANG J Y,SONG X M,SONG P,et al.The effect of atmospheric turbulence on wireless ultraviolet communication[J].Journal of Xi′an Polytechnic University,2016,30(3):322-326.(in Chinese)