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Method And Apparatus Of Free-Space Optical Signal Reception Having Enhanced Performance In Scattering Environments
Method And Apparatus Of Free-Space Optical Signal Reception Having Enhanced Performance In Scattering Environments
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机译:在散射环境中具有增强性能的自由空间光信号接收的方法和设备
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摘要
A free space optical receiver is provided that can mitigate the detrimental effects of scattering. In an implementation, the optical beam is imaged onto a detector array in the image plane of the receiver telescope. The detector array has a series of two or more concentric zones for detecting optical power, i.e., for converting optical input to electrical output. The electrical output from each of the detection zones is processed by a respective adaptive equalizer, which is operative for compressing the detected signal pulses to counteract the effect of delay spread and thereby to reduce inter-symbol interference. The outputs from the respective adaptive equalizers are then combined for the purpose of signal recovery.
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