摘要
分析了用于探测长波红外所用的光电导型碲镉汞探测器的噪声种类,建立了相应的噪声模型;结合不同大气湍流条件下的光强分布模型,采用数字脉冲间隔调制方式推导得到了长波红外无线激光通信系统的误码率表达式。在选取典型仿真数据的基础上,对不同大气湍流强度、通信距离、传输速率以及平均发射功率条件下的长波红外无线激光通信误码率进行了数值仿真分析。结果表明,长波红外的抗大气湍流能力强,通过选取合适的发射功率以及传输速率可以满足系统工作时对误码率的要求。
The noise types of photoconductive HgCdTe detector which is used to detect long-wave infrared are analyzed, and corresponding noise models are established. Combined with light intensity distribution models under different atmospheric turbulence conditions, the bit error rate expression of long-wave infrared wireless laser communication system is obtained when we use the digital pulse interval modulation mode. On the basis of selecting typical simulation data, the numerical simulation analysis for the bit error rate of long-wave infrared wireless laser communication is carried out with different atmosphere turbulence intensities, communication distances, transmission rates and average transmission powers. The results show that the long-wave infrared has the strong ability to resist the atmospheric turbulence, and the bit error rate can be satisfied when we choose proper transmission power and transmission rate.
出处
《激光与光电子学进展》
CSCD
北大核心
2017年第3期89-95,共7页
Laser & Optoelectronics Progress
基金
区域光纤通信网与新型光通信系统国家重点实验室开放基金(2013GZKF031304)
关键词
光通信
数字脉冲间隔调制
碲镉汞
噪声
大气湍流
误码率
optical communications
digital pulse interval modulation
HgCdTe
noise
atmospheric turbulence
bit error rate
