首页> 外文期刊>Optik: Zeitschrift fur Licht- und Elektronenoptik: = Journal for Light-and Electronoptic >Bit error rate analysis with real-time pointing errors correction in free space optical communication systems
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Bit error rate analysis with real-time pointing errors correction in free space optical communication systems

机译:自由空间光通信系统中具有实时指向错误校正的误码率分析

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摘要

Pointing errors caused by the atmospheric turbulence will degrade the performance of free space optical (FSO) communication systems, especially the bit error rate (BER). In this paper, we innovatively analyze the relationship between BER and pointing errors by the probability density functions (PDFs) and intensity displacement in focal plane under the On-Off Keying (OOK) modulation conditions. The closed-loop experimental system is set up in laboratory, where the fast steering mirror (FSM) is real-time controlled by embedded controller with the parallel processing technology and the atmospheric turbulence is simulated by a turbulence simulation box. The results of repeated experiments show that the method of pointing errors correction we proposed is efficient under the conditions of atmospheric turbulence. By utilizing our method, the BER can decrease from nearly 10?3 to nearly or even below 10?9, thus improving the performance of FSO communication systems significantly.
机译:由大气湍流引起的指向错误将降低自由空间光学(FSO)通信系统的性能,尤其是误码率(BER)。在本文中,我们通过概率密度函数(PDF)和在开关键控(OOK)调制条件下焦平面上的强度位移来创新地分析BER和指向错误之间的关系。在实验室中建立了闭环实验系统,其中快速转向镜(FSM)由具有并行处理技术的嵌入式控制器实时控制,并通过湍流仿真箱对大气湍流进行仿真。重复实验的结果表明,我们提出的指向误差校正方法在大气湍流条件下是有效的。通过使用我们的方法,BER可以从近10?3降低到近乎甚至低于10?9,从而显着提高FSO通信系统的性能。

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