發(fā)布時(shí)間：2018-07-16 20:27

【摘要】：進(jìn)入4G時(shí)代以來,各種語音和視頻、高速數(shù)據(jù)業(yè)務(wù)的快速發(fā)展,導(dǎo)致了IP流量也跟隨其快速增長,從而對骨干傳輸網(wǎng)絡(luò)提出了更高的要求。相應(yīng)的,光纖通信也得到了飛速發(fā)展,100Gbps高速長距離光傳輸系統(tǒng),100Gbps高速城域光傳輸系統(tǒng)以及200G高速城域光傳輸系統(tǒng)等高速通信已經(jīng)面臨大量商用的局面,然而其成本則居高不下,其原因是光纖高速通信的DSP技術(shù)被少數(shù)公司所壟斷,因此開發(fā)出一款DSP產(chǎn)品有利于光傳輸市場的充分競爭,不但能提升網(wǎng)速并且能降低流量價(jià)格,使廣大用戶受益。在高速光纖通信的系統(tǒng)傳輸過程中,信號在傳輸過程中主要受到了以下干擾:光電轉(zhuǎn)換,電光轉(zhuǎn)換,光調(diào)制解調(diào)器等模擬器件對信號的損傷;本振光源和發(fā)送光載波的頻差以及相位噪聲;光纖色度色散的影響;兩個(gè)偏振態(tài)之間的串?dāng)_。DSP預(yù)處理系統(tǒng)作為DSP芯片收端第一級,著力解決于前級光電轉(zhuǎn)換,電光轉(zhuǎn)換,光調(diào)制解調(diào)器等模擬器件對信號引入的直流分量,四路延時(shí)不對齊,以及IQ不平衡,并根據(jù)信號計(jì)算出功率增益以控制前級的放大器,使模擬信號功率使得ADC工作在最佳狀態(tài)。為解決上述問題,設(shè)計(jì)去直流模塊用于信號取反和去直流,延時(shí)調(diào)整模塊用于信號取反和延時(shí)調(diào)整,動(dòng)態(tài)延時(shí)跟蹤模塊用于動(dòng)態(tài)延時(shí)的計(jì)算,IQ不平衡補(bǔ)償模塊用于IQ兩路幅度的調(diào)平,功率增益模塊用于功率增益計(jì)算和功率丟失LOS告警信號的計(jì)算。在設(shè)計(jì)完成之后,針對預(yù)處理系統(tǒng)提取出45個(gè)功能點(diǎn),并規(guī)劃71條測試用例,截止論文結(jié)束時(shí),71條用例全部通過,并覆蓋所有功能點(diǎn)。本文中對DSP預(yù)處理系統(tǒng)從算法,硬件和驗(yàn)證三個(gè)角度進(jìn)行了詳述,對作者在預(yù)處理系統(tǒng)中的工作做了總結(jié),并在文章的最后對后期工作做了展望�？偠灾�,未來幾年,光纖通信行業(yè)將迎來空前的發(fā)展,100Gbps傳輸網(wǎng)絡(luò)將大量的進(jìn)入市場,希望文中100Gbps數(shù)字信號處理技術(shù)能夠成功進(jìn)入市場,造福廣大用戶。
[Abstract]:Since the 4G era, the rapid development of voice, video and high-speed data services has led to the rapid growth of IP traffic, which puts forward higher requirements for backbone transmission networks. Accordingly, optical fiber communication has also been developed rapidly, such as 100Gbps high-speed metropolitan optical transmission system and 200G high-speed metropolitan optical transmission system. However, its cost is still high. The reason is that the DSP technology of fiber-optic high-speed communication is monopolized by a few companies, so developing a DSP product is conducive to the full competition of the optical transmission market, which can not only increase the speed of the network, but also reduce the price of traffic, and benefit the vast number of users. In the transmission process of high-speed optical fiber communication system, the signal is mainly affected by the following interference: photoelectric conversion, electro-optic conversion, optical modem and other analog devices damage the signal; The frequency difference and phase noise of local light source and transmitting optical carrier, the influence of chromatic dispersion of optical fiber, the crosstalk between two polarization states, the DSP pretreatment system, as the first stage of receiving end of DSP chip, are solved in the front stage photoelectric conversion, electro-optic conversion, etc. Analog devices, such as optical modems, introduce DC components, four-channel delay misalignment, and unbalanced IQ, and calculate the power gain according to the signal to control the amplifier, so that the analog signal power makes the ADC work in the best state. In order to solve the above problems, the de-DC module is designed for signal retrieval and de-DC, and the delay adjustment module is used for signal retrieval and delay adjustment. The dynamic delay tracking module is used to calculate the dynamic delay and the IQ imbalance compensation module is used to adjust the amplitude of IQ, the power gain module is used to calculate the power gain and the power loss Los alarm signal is calculated. After the design is completed, 45 function points are extracted for the preprocessing system, and 71 test cases are planned. By the end of the paper, all of the 71 use cases have passed and all the function points have been covered. In this paper, the DSP preprocessing system from the algorithm, hardware and verification three aspects are described in detail, the author's work in the pre-processing system is summarized, and in the last part of the paper, the future work is prospected. In short, in the next few years, the optical fiber communication industry will usher in an unprecedented development of 100Gbps transmission network will enter the market a large number of hope that the 100Gbps digital signal processing technology can successfully enter the market, for the benefit of the vast number of users.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN929.1;TP332

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