Search Results - Shijie Gao
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Measurement Approaches and Implementation of a Fading Characterization Tester for Evaluating Optical Turbulent Channels
Published 2020-01-01Get full textOptical wireless communication (OWC) systems can exhibit high percentage availability, yet suffering from frequent intensity fades caused by turbulence effects and pointing errors. The intuitive method to character the link is using commercial bit error rate testers (BERT) by measuring the output se...
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Improved ADRC With ILC Control of a CCD-Based Tracking Loop for Fast Steering Mirror System
Published 2018-01-01Get full textIn order to improve the tracking accuracy of the fine tracking system of free-space optical communications, a proposed active disturbance rejection control (ADRC) with iterative learning control (ILC) strategy is designed to regulate the fast steering mirror (FSM) system. First, based on the open-lo...
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Free-Space Optical Communication Using Coherent Detection and Double Adaptive Detection Thresholds
Published 2019-01-01Get full textIn this paper, <sc>on</sc>–<sc>off</sc> Keying free-space optical (FSO) communication with coherent detection and double adaptive detection thresholds is proposed. The 3-bit encoding and double adaptive detection thresholds presented in the scheme can significantly...
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