【摘要】：在單一波長信道上同時提供超寬帶(ultra-wideband,UWB)無線接入業(yè)務(wù)與基帶有線接入業(yè)務(wù),可以極大的降低波分復(fù)用無源光網(wǎng)絡(luò)(wavelength-division multiplexing passive optical network,WDM-PON)的復(fù)雜度和建設(shè)成本。由于超寬帶信號占據(jù)著3.1 GHz至10.6 GHz的頻譜范圍,因此在0~3.1 GHz區(qū)間將產(chǎn)生一個狹窄的閑置頻帶,可以被用于傳輸有限比特率的基帶有線信號。本文提出了兩種同時傳輸超寬帶信號與基帶有線信號的方案。在第一種方案中,高階超寬帶信號被用以擴展閑置頻帶的寬度,并且通過采用多級脈沖幅度調(diào)制(multi-level pulse amplitude modulation,M-PAM)信號提升了有限閑置頻帶中的基帶有線信號的比特率。在第二種機制里,使用了多帶超寬帶信號(multi-band ultra-wideband,MB-UWB),由于其靈活的中心頻率以及較窄的頻譜寬度,閑置頻帶的寬度得到了極大的擴展。因此,多級幅度調(diào)制信號的比特率得到了進一步的提升。與正交相移鍵控(quadrature phase shift keying,QPSK)、正交幅度調(diào)制(quadrature amplitude modulation,QAM)等其他適用于WDM-PON的高級調(diào)制格式相比,多級幅度調(diào)制信號可以通過強度直接檢測(intensity modulation direct detection,IM-DD)進行接收,較為簡單,可以極大的降低用戶端的成本。在此基礎(chǔ)上,本文主要做了如下工作:(1)闡述了基于光纖的多級幅度調(diào)制基帶有線信號與超寬帶無線信號融合傳輸技術(shù)的歷史背景及研究意義,并簡單闡述了多級幅度調(diào)制有線信號和超寬帶信號的定義、技術(shù)特點、應(yīng)用范圍。(2)提出了新穎的多級幅度調(diào)制基帶有線信號與超寬帶無線信號融合傳輸系統(tǒng),并詳細闡述了這一系統(tǒng)的工作原理,包括多級幅度調(diào)制基帶有線信號與超寬帶無線信號的產(chǎn)生、融合、調(diào)制、傳輸、接收與恢復(fù)。(3)基于前述的實驗原理,實現(xiàn)了2.5 Gbit/s四級幅度調(diào)制基帶有線信號基帶有線信號與1.25 Gbit/s四階超寬帶(quadruplet)無線信號的20千米常規(guī)單模光纖(standard single mode fiber,SSMF)無補償融合傳輸系統(tǒng)。通過接收端測量得到的頻譜、眼圖以及誤碼率,證明了該系統(tǒng)具有良好的性能。(4)針對前項試驗中閑置頻帶過窄,嚴重影響了基帶有線信號的速率提升,為了進一步提升融合傳輸系統(tǒng)的性能,多帶超寬帶信號被引入融合傳輸系統(tǒng),實現(xiàn)了10 Gbit/s四級幅度調(diào)制基帶有線信號與1 Gbit/s多帶超寬帶無線信號的20千米常規(guī)單模光纖無補償融合傳輸系統(tǒng)。通過頻譜、眼圖以及誤碼率證明了該系統(tǒng)不僅提升了傳輸能力,更提升了傳輸質(zhì)量。
[Abstract]:Providing both ultra-wideband (ultra-wideband,UWB) wireless access service and baseband wired access service on a single wavelength channel can greatly reduce the complexity and construction cost of WDM passive optical network (wavelength-division multiplexing passive optical network,WDM-PON). Since ultra-wideband signals occupy the spectrum range from 3.1 GHz to 10.6 GHz, a narrow idle band will be generated in the 0 / 3.1 GHz range, which can be used to transmit baseband wired signals with limited bit rate. In this paper, two schemes for simultaneous transmission of ultra-broadband signal and baseband wired signal are proposed. In the first scheme, the high-order ultra-wideband signal is used to extend the width of the idle band and is modulated by a multistage pulse amplitude modulation (multi-level pulse amplitude modulation,). M-PAM) signal increases the bit rate of baseband wired signal in a limited idle frequency band. In the second scheme, multi-band ultra-wideband signal (multi-band ultra-wideband,MB-UWB) is used. Due to its flexible center frequency and narrow spectrum width, the width of idle band is greatly expanded. Therefore, the bit rate of multistage amplitude modulation signal has been further improved. Compared with other advanced modulation schemes such as orthogonal phase shift keying (quadrature phase shift keying,QPSK), orthogonal amplitude modulation (quadrature amplitude modulation,QAM) and other advanced modulation schemes for WDM-PON, multistage amplitude modulation signals can detect (intensity modulation direct detection, directly by strength. IM-DD) receiving, relatively simple, can greatly reduce the cost of the client. On this basis, the main work of this paper is as follows: (1) the historical background and research significance of fiber-based multistage amplitude modulation baseband wired signal and ultra-wideband wireless signal fusion transmission technology are described. The definition, technical characteristics and application range of multi-stage amplitude modulation wired signal and ultra-wideband signal are briefly described. (2) A novel multistage amplitude modulation baseband wired signal and ultra-wideband wireless signal fusion transmission system is proposed. The working principle of the system is described in detail, including the generation, fusion, modulation, transmission, reception and recovery of multi-stage amplitude modulation baseband wired signal and ultra-broadband wireless signal. (3) based on the above experimental principle, A 20-kilometer conventional single-mode fiber (standard single mode fiber,SSMF) fusion transmission system for 2.5 Gbit/s four-stage amplitude modulation baseband wired signal and 1. 25 Gbit/s fourth-order ultra-broadband (quadruplet) wireless signal is implemented. Through the spectrum, eye diagram and bit error rate measured by the receiver, it is proved that the system has good performance. (4) the idle frequency band is too narrow in the previous test, which seriously affects the rate improvement of baseband wired signal. In order to further improve the performance of the converged transmission system, the multi-band ultra-wideband signal is introduced into the converged transmission system. A 20-kilometer conventional single-mode fiber uncompensated fusion transmission system with 10 Gbit/s four-stage amplitude modulation baseband wired signal and 1 Gbit/s multi-band ultra-broadband wireless signal is realized. The spectrum, eye chart and bit error rate (BER) prove that the system not only improves the transmission capacity, but also improves the transmission quality.
【學(xué)位授予單位】：重慶理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN925;TN929.11

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