期刊文献+

离散速率条件下的大气激光通信自适应调制编码系统性能 被引量:7

Performance of Adaptive Modulation Coding System for Atmospheric Laser Communication Under Discrete Rate Condition
原文传递
导出
摘要 针对大气湍流引起的系统频带利用率下降的问题,研究了一种离散速率条件下的大气激光通信自适应调制编码系统。从信号层角度建立了湍流信道模型,给出了湍流信道下的瞬时信噪比概率密度函数,并采用外场实验验证了该信道模型。理论推导了系统频带利用率和误码率表达式,仿真结果表明大气激光通信自适应调制编码系统较传统单一传输模式系统具有优越性。研究了其频带利用率和误码率曲线特性,分析了误码率要求和湍流强度对系统性能的影响。结果表明降低误码率要求可大幅提高系统的频带利用率,且误码率要求越低,湍流强度越弱,频带利用率越高。 For the decrease of system spectral efficiency caused by atmospheric turbulence,an adaptive modulation and coding system for atmospheric laser communication under discrete rate condition is studied.A turbulent channel model is established from the viewpoint of signal layer,and the probability density function of instantaneous signal to noise ratio in turbulent channel is presented and verified by outfield experiments.The system spectral efficiency and bit error rate formulas are derived theoretically.Simulation results indicate that the adaptive modulation and coding system for atmospheric laser communication is superior to the traditional single transmission mode system.In addition,the characteristics of spectral efficiency curves and error rate curves are studied.Influences of bit error rate requirement and turbulence intensity on system performance are analyzed.Results show that the spectral efficiency is greatly improved when we decrease the bit error rate requirement.The lower the bit error rate requirement is,the weaker the turbulence intensity is,and the higher the spectral efficiency is.
出处 《光学学报》 EI CAS CSCD 北大核心 2017年第7期50-57,共8页 Acta Optica Sinica
基金 国家自然科学基金(61571446) 安徽省自然科学基金(1308085MF83)
关键词 光通信 大气湍流 自适应调制编码 频带利用率 误码率 optical communications atmospheric turbulence adaptive modulation and coding spectral efficiency bite error rate
  • 相关文献

参考文献6

二级参考文献40

  • 1刘立人,王利娟,栾竹,孙建锋,刘德安.卫星激光通信终端光跟踪检测的数理基础[J].光学学报,2006,26(9):1329-1334. 被引量:12
  • 2刘立人.卫星激光通信 Ⅱ地面检测和验证技术[J].中国激光,2007,34(2):147-155. 被引量:32
  • 3B.J.Dixon,R.D.Pollard,S.Iezekiel.Orthogonal frequency-division multiplexing in wireless communication systems with multimode fiber feeds[J].IEEE Transactions on Microwave and Techniques,2001,49(8):1404-1409. 被引量:1
  • 4A.J.Lowery,L.Du,J.Armstrong.Orthogonal frequency division multiplexing for adaptive dispersion compensation in long haul WDM systems[C].Optical Fiber Communication Conference,2006,1-6:2753-2755. 被引量:1
  • 5Q.Pan,R.J.Green.Bit-error-rate performance of lightwave hybrid AM/OFDM systems with comparison with AM/QAM systems in the presence of clipping impulse noise[J].IEEE Photon.Technol.Lett.,1996,8(2):278-280. 被引量:1
  • 6Zhu Xiaoming,J.M.Kahn.Free-space optical communication through atmospheric turbulence channels[J].IEEE Trans.Commun.,2002,50(8):1293-1300. 被引量:1
  • 7Ruizhong Rao.Genetal optical scintillation in turbulent atmosphere[J].Chin.Opt.Lett.,2008,6(8):547-549. 被引量:1
  • 8K.Kiasaleh.Performance of APD-based,PPM free-space optical communication systems in atmospheric turbulence[J].IEEE Trans.Commun.,2005,53(9):1455-1461. 被引量:1
  • 9A.Ohhashi,T.Ohtsuki.Regular low-density parity-check (LDPC) code with normalized and UMP BP-based algorithms on fast Rayleigh fading channel[C].Vehicular Technology Conference,2004,4:2520-2524. 被引量:1
  • 10O.Gonzalez,R.Perez-Jimenez,S.Rodriguez et al..OFDM over indoor wireless optical channel[J].IEE Proc.Optoelectron.,2005,152(4):199-204. 被引量:1

共引文献40

同被引文献71

引证文献7

二级引证文献17

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部