Abstract
This paper proposes a free space optical communication (FSO) receivier system with adaptive alignment based on pure phase holographic imaging. During the frame header transmission period, the optical phased array in this system performs specific holographic imaging on the receiving plane, which assist the system to undergo beam alignment. The system model has been built in this work, along with the receiving signal expression. Based on the physical model, we propose an algorithm for positioning calibration and the circuitous phased encoding for improvement of imaging quality and algorithm complexity.
Highlights
With the increasing demand for spectrum resources, optical communication has become an indispensable part of future communication systems
This paper presents a free space optical communication (FSO) receiver with adaptive alignment based on pure phase holographic imaging
Since hp is one of the most important factors affecting the performance of the receiving signal, the alignment of the optical signal is meaningful for the communication system
Summary
With the increasing demand for spectrum resources, optical communication has become an indispensable part of future communication systems. With the introduction of concepts, such as optical mobile communications and intelligent reflecting surfaces, many studies have tried to apply optical communications to mobile multi-user scenarios [5,6,7,8,9] This directly leads to an increasing demand for receiver alignment accuracy. There are many FSO adaptively calibrated receivers in the existing work, most of them require a feedback link between the transmitter and the receiver and are based on a mechanical structure, which has low accuracy and is easy to tear. This paper presents a free space optical communication (FSO) receiver with adaptive alignment based on pure phase holographic imaging. In the transmission stage of the frame header, the OPA utilizes holographic projection to jointly determine the relative position of the optical beam and the receiver, making corresponding adjustments.
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