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Adaptive optical transmitter and receiver for space communication through thin clouds

机译：自适应光学发射器和接收器，用于通过薄云进行空间通信

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Optical space communication from satellite to ground or air to air consists of clouds as part of communication channels. Propagation of optical pulses through clouds causes widening and deformation in the time domain and attenuation of the pulse radiant power. These effects decrease the received signal and limit the information bandwidth of the communication system. Having dealt with the other effects previously, here we concentrate on pulse broadening in the time domain. We derive a mathematical model of an adaptive optical communication system with a multiscattering channel (atmospheric cloud). We use knowledge about the impulse response function of the cloud to adapt the communication parameters to the transfer function of the cloud. The communication system includes a receiver and a transmitter. We adapted the transmitter to atmospheric conditions by changing the bit error rate. One can adapt the receiver to the atmospheric condition by changing the parameters of the detector and the filter. An example for a practical communication system between a low Earth orbit satellite and a ground station cover by cloud is given. Comparison and analysis of an adaptive and semiadaptive system with cloud channels are presented. Our conclusion is that in some cases only by such adaptive methods is optical communication possible. (C) 1997 Optical Society of America.
机译：从卫星到地面或从空中到空中的光空间通信由云组成，是通信通道的一部分。光脉冲通过云的传播会导致时域变宽和变形，并导致脉冲辐射功率衰减。这些影响降低了接收信号并限制了通信系统的信息带宽。先前已经处理了其他影响，在此我们集中讨论时域中的脉冲展宽。我们推导了具有多散射通道（大气云）的自适应光通信系统的数学模型。我们使用有关云的脉冲响应函数的知识来使通信参数适应云的传递函数。该通信系统包括接收机和发射机。我们通过更改误码率使发射机适应了大气条件。可以通过更改检测器和过滤器的参数使接收器适应大气条件。给出了一个近地轨道卫星与地面站被云覆盖之间的实际通信系统的例子。介绍了具有云通道的自适应和半自适应系统的比较和分析。我们的结论是，在某些情况下，只有通过这种自适应方法才能进行光通信。 （C）1997年美国眼镜学会。

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