本文關鍵詞： 空間光通信 湍流信道 ATP CMOS探測器　出處：《電子科技大學》2017年碩士論文　論文類型：學位論文

【摘要】：ATP(Acquisition,Tracking and pointing)技術是空間激光通信鏈路快速建立和保持鏈路穩(wěn)定的重要條件,ATP技術是空間激光通信領域研究的熱點和難點。本文以某近地湍流信道空間激光通信項目為依托,開展了基于CMOS探測器的湍流信道高性能ATP技術研究,研究主要目標是完成具有大視場快速捕獲能力及小視場高性能跟蹤的ATP方案設計及實現(xiàn)。論文主要研究內(nèi)容如下:1)論文開展了ATP技術國內(nèi)外動態(tài)分析,梳理了ATP技術發(fā)展在目前所存在的問題,根據(jù)應用需求,確定了論文研究目標。2)論文開展了ATP系統(tǒng)性能主要影響因素分析工作,其中涉及大氣湍流對光斑檢測的影響;對光斑檢測主要誤差來源進行研究,并對噪聲對系統(tǒng)性能影響進行分析;平臺抖動對ATP系統(tǒng)性能影響;確定了論文研究的性能指標。3)論文開展了近地湍流ATP系統(tǒng)重要方案設計,主要包括:完成基于CMOS自適應開窗的ATP掃描捕獲、粗精跟蹤方案的設計;完成CMOS探測器的去噪算法分析及設計;完成光斑質(zhì)心算法分析及設計。并通過仿真驗證了粗精跟蹤閉環(huán)執(zhí)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系統(tǒng)主控模塊及光斑檢測模塊設計及電路實現(xiàn),通過實驗測試方法驗證了論文設計方案的可行性和有效性。5)搭建近地湍流信道10KM無線光通信實驗平臺開展了鏈路級測試驗證,驗證結果表明:系統(tǒng)完整實現(xiàn)了基于CMOS自適應開窗功能的捕獲、粗精跟蹤功能,并成功建立雙通鏈路;155Mbps傳輸碼率條件下,3*24小時通信誤碼率保持在1E-7量級;粗跟蹤精度優(yōu)于24μrad;精跟蹤帶寬達到1khz、控制精度優(yōu)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.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.1

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