基于CMOS探测器的湍流信道高性能ATP技术研究

发布时间：2018-02-24 18:33

本文关键词： 空间光通信湍流信道 ATP CMOS探测器　出处：《电子科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：ATP(Acquisition,Tracking and pointing)技术是空间激光通信链路快速建立和保持链路稳定的重要条件,ATP技术是空间激光通信领域研究的热点和难点。本文以某近地湍流信道空间激光通信项目为依托,开展了基于CMOS探测器的湍流信道高性能ATP技术研究,研究主要目标是完成具有大视场快速捕获能力及小视场高性能跟踪的ATP方案设计及实现。论文主要研究内容如下:1)论文开展了ATP技术国内外动态分析,梳理了ATP技术发展在目前所存在的问题,根据应用需求,确定了论文研究目标。2)论文开展了ATP系统性能主要影响因素分析工作,其中涉及大气湍流对光斑检测的影响;对光斑检测主要误差来源进行研究,并对噪声对系统性能影响进行分析;平台抖动对ATP系统性能影响;确定了论文研究的性能指标。3)论文开展了近地湍流ATP系统重要方案设计,主要包括:完成基于CMOS自适应开窗的ATP扫描捕获、粗精跟踪方案的设计;完成CMOS探测器的去噪算法分析及设计;完成光斑质心算法分析及设计。并通过仿真验证了粗精跟踪闭环执行性能以及光斑去噪算法性能。4)基于Altera Cyclone系列FPGA芯片,完成ATP系统主控模块及光斑检测模块设计及电路实现,通过实验测试方法验证了论文设计方案的可行性和有效性。5)搭建近地湍流信道10KM无线光通信实验平台开展了链路级测试验证,验证结果表明:系统完整实现了基于CMOS自适应开窗功能的捕获、粗精跟踪功能,并成功建立双通链路;155Mbps传输码率条件下,3*24小时通信误码率保持在1E-7量级;粗跟踪精度优于24μrad;精跟踪带宽达到1khz、控制精度优于5μrad。
[Abstract]:ATP technology is an important condition for the rapid establishment and maintenance of link stability of space laser communication links. ATP technology is a hot and difficult point in the field of space laser communication. This paper is based on a project of space laser communication in near-ground turbulent channel. The high performance ATP technology of turbulent channel based on CMOS detector is studied. The main goal of this paper is to complete the design and implementation of ATP scheme with large field of view fast capture ability and small field of view high performance tracking. The main research contents of this paper are as follows: 1) the dynamic analysis of ATP technology at home and abroad is carried out in this paper. Combing the problems existing in the development of ATP technology at present, according to the application requirements, the research objective of this paper is determined. (2) the main factors affecting the performance of ATP system are analyzed in this paper, including the influence of atmospheric turbulence on spot detection. The main error sources of spot detection are studied, and the influence of noise on system performance is analyzed. The platform jitter affects the performance of ATP system. The performance index. 3) the important scheme design of near-ground turbulence ATP system is carried out. The main contents are as follows: the design of ATP scanning acquisition based on CMOS adaptive window opening, the design of coarse fine tracking scheme, the analysis and design of CMOS detector de-noising algorithm; Finish the analysis and design of spot centroid algorithm, and verify the performance of coarse fine tracking closed loop and speckle denoising algorithm .4) based on Altera Cyclone series FPGA chip, the design and circuit realization of the main control module and spot detection module of ATP system are completed. The feasibility and validity of the design scheme are verified by the experimental test method. 5) the link level test verification is carried out on the 10km wireless optical communication platform of near-ground turbulence channel. The verification results show that the system realizes the capture and coarse fine tracking function based on CMOS adaptive window opening function, and successfully establishes a double-pass link with 155Mbps transmission bit rate to maintain the error rate in the order of 1E-7 under the condition of the transmission rate of 155Mbps. The coarse tracking accuracy is better than 24 渭 radand the precision tracking bandwidth is 1 kHz and the control precision is better than 5 渭 rad.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.1

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