舰船激光通信中大气湍流对系统误比特率的影响  

Effect of the atmospheric turbulence on the bit error rate of laser communication among the ships

作　　者：赵英俊[1] 王江安[1] 任席闯[1] 王乐东[1] 

机构地区：[1]海军工程大学电子工程学院

出　　处：《激光技术》2010年第2期261-264,共4页Laser Technology

基　　金：海军"十一五"预研资助项目(4010607020201)

摘　　要：为了研究舰船激光通信系统中采用多光束发射与接收技术时,大气湍流对系统误比特率造成的影响,采用了对激光在大气湍流场中的传输方程进行解析求解的方法,忽略系统中其它噪声,仅考虑由大气湍流引起的系统误比特率,得到了在不同发射天线数目和相关系数条件下,传输距离、大气信道间距、对数振幅方差和系统误比特率的关系。结果表明,在弱起伏条件下,随着发射天线数目的增多或相关系数的减小,系统误比特率减少很快;湍流强度增大,系统误比特率增加;传输激光波长增大,系统误比特率降低;当发射天线数目一定时,随着大气信道间距变大,系统误比特率降低。The effect of the atmospheric turbulence on the bit error rate in a laser communication system with multiple beam transmission and reception was analyzed. Ignoring other noises in the system, atmosphere turbulence was the only cause for bit error rate. After solving the equation of laser transmission in atmospheric turbulence field, the relation between the system bit error rate, transmission range and space of atmospheric channels was obtained under the condition of the different number of transmitting antenna and correlation coefficients. The result indicated： under the weak fluctuation condition, the system bit error rate reduces quickly while increasing the number of transmitting antenna or decreasing the correlation coefficient or increasing the space between atmospheric channels; the system bit error rate increases while the turbulence intensity enhances; the system bit error rate reduces while the wavelength of transmission laser increases. When the transmitting antenna number is definite, system bit error rate will reduce with the space of atmospheric channels increasing.

关 键 词：光通信 多光束发射与接收 误比特率 大气湍流 

分 类 号：TN929.12[电子电信—通信与信息系统]