本文選題：光正交頻分復(fù)用 + 小波包變換　； 參考：《電子科技大學(xué)》2014年博士論文

【摘要】：光正交頻分復(fù)用(OOFDM)技術(shù)以其卓越的對(duì)色散及偏振模色散容忍能力、高效的頻譜效率(SE)等特點(diǎn)受到廣泛關(guān)注。OOFDM技術(shù)能夠與高階調(diào)制技術(shù)、波分復(fù)用(WDM)和偏振復(fù)用(PDM)等技術(shù)相結(jié)合,從而提高光纖傳輸系統(tǒng)的傳輸速率、色散容限和頻譜利用率。本文針對(duì)OOFDM在WDM-PON系統(tǒng)、強(qiáng)度調(diào)制/直接探測(IMDD)和相干光探測單模光纖傳輸系統(tǒng)、全光OFDM(AO-OFDM)系統(tǒng),以及數(shù)據(jù)中心多模光纖傳輸系統(tǒng)等環(huán)境中的應(yīng)用,提出四種OOFDM中的新技術(shù),并分別對(duì)其在光纖傳輸系統(tǒng)中的應(yīng)用進(jìn)行了理論仿真,同時(shí)展開相關(guān)實(shí)驗(yàn)對(duì)提出的理論進(jìn)行驗(yàn)證。主要?jiǎng)?chuàng)新工作概括如下:1.提出基于部分子載波空置OFDM(PCF-OFDM)技術(shù)的WDM-PON和IMDD光纖傳輸系統(tǒng),通過理論分析和系統(tǒng)仿真,研究了PCF-OFDM對(duì)光纖傳輸中四波混頻(FWM)非線性效應(yīng)的抑制問題;通過基于PCF-OFDM的IMDD光纖傳輸系統(tǒng)實(shí)驗(yàn)對(duì)理論分析和系統(tǒng)仿真進(jìn)行驗(yàn)證,結(jié)果表明采用均勻間隔子載波距離的PCF-OFDM可以較好地抑制FWM非線性效應(yīng)和因直接探測帶來的噪聲影響。2.提出在光纖通信系統(tǒng)中將小波包變換(WPT)替代FFT變換用于OFDM技術(shù)中實(shí)現(xiàn)子載波的正交調(diào)制,即WPT-OFDM。對(duì)IMDD WPT-OFDM和相干WPT-OFDM光纖傳輸系統(tǒng)方案進(jìn)行系統(tǒng)仿真分析,結(jié)果表明將WPT-OFDM應(yīng)用于光纖傳輸系統(tǒng)是可行的,可以作為OOFDM技術(shù)的可選方案;在對(duì)相干WPT-OFDM光纖系統(tǒng)的研究中,對(duì)不同正交鏡像濾波器(QMF)組長度和不同小波族的WPT變換分別進(jìn)行仿真分析,并與傳統(tǒng)的基于FFT變換的相干光OFDM(CO-OFDM)傳輸系統(tǒng)的傳輸性能進(jìn)行比較。結(jié)果表明,部分小波母函數(shù)可替代FFT用于光纖傳輸系統(tǒng);通過IMDD WPT-OFDM光纖傳輸系統(tǒng)實(shí)驗(yàn)對(duì)理論仿真結(jié)果進(jìn)行驗(yàn)證,結(jié)果證實(shí)了采用IMDD WPT-OFDM在光纖系統(tǒng)傳輸?shù)目尚行浴?.針對(duì)高速光纖傳輸系統(tǒng)中接收端因電子瓶頸限制而無法進(jìn)行高速信號(hào)接收的問題,提出基于AO-OFDM技術(shù)的非對(duì)稱接收機(jī)/發(fā)射機(jī)系統(tǒng)結(jié)構(gòu),即在高速AO-OFDM光纖傳輸系統(tǒng)中,接收端采用多個(gè)通用商用相干接收機(jī)對(duì)AO-OFDM信號(hào)進(jìn)行并行接收,以達(dá)到利用現(xiàn)有較低帶寬相干接收機(jī)進(jìn)行高速AO-OFDM信號(hào)接收的目的。方案中,AO-OFDM信號(hào)通過光帶通濾波器(OBPF)被分成帶寬相等的幾部分信號(hào),每部分信號(hào)采用通用相干接收機(jī)進(jìn)行接收,OBPF帶寬與接收機(jī)可接收帶寬匹配,同時(shí),利用多級(jí)級(jí)聯(lián)MZDIs實(shí)現(xiàn)全光FFT(OFFT)變換,用于實(shí)現(xiàn)AO-OFDM信號(hào)的光域解復(fù)用�；诂F(xiàn)有PDM-QPSK單載波系統(tǒng),提出并成功實(shí)現(xiàn)Tb/s光纖傳輸系統(tǒng)的長程傳輸,并對(duì)該系統(tǒng)在無色散補(bǔ)償光纖情況下,因光門采樣對(duì)信號(hào)造成的損傷問題進(jìn)行了分析。4.在現(xiàn)有基于FPGA的實(shí)時(shí)IMDD OFDM光纖傳輸系統(tǒng)實(shí)驗(yàn)平臺(tái)上,提出并設(shè)計(jì)完成智能實(shí)驗(yàn)平臺(tái)。通過該智能實(shí)驗(yàn)平臺(tái)可以實(shí)現(xiàn)自動(dòng)自適應(yīng)比特分配和功率分配,以及傳輸性能的在線實(shí)時(shí)監(jiān)測。該實(shí)驗(yàn)平臺(tái)不僅簡化了未來高級(jí)OOFDM收發(fā)機(jī)的實(shí)驗(yàn)設(shè)計(jì),同時(shí)也為將來在該實(shí)驗(yàn)平臺(tái)上添加更多智能化功能提供了方便。5.提出并實(shí)驗(yàn)驗(yàn)證基于無溫控直接調(diào)制光注入鎖定垂直腔面發(fā)射激光器(OIL-VCSEL)的實(shí)時(shí)雙帶OOFDM收發(fā)機(jī)設(shè)計(jì)的光纖傳輸系統(tǒng),OIL-VCSEL的有效帶寬和頻譜響應(yīng)可在光域(主激光器注入波長和光功率、偏振控制)和電域(VCSEL偏置電流)進(jìn)行調(diào)節(jié)。利用采樣率低至4 GS/s的DAC/ADC實(shí)現(xiàn)自適應(yīng)OOFDM信號(hào)在IMDD的OM2多模光纖中進(jìn)行傳輸。同時(shí),由于OIL條件的變化會(huì)帶來OIL-VCSEL有效調(diào)制帶寬范圍內(nèi)頻率響應(yīng)的顯著變化,因此針對(duì)系統(tǒng)總傳輸速率的變化進(jìn)行了進(jìn)一步研究。
[Abstract]:Optical orthogonal frequency division multiplexing (OOFDM) technology is widely concerned with its excellent characteristics of dispersion and polarization mode dispersion tolerance, high efficiency spectrum efficiency (SE) and so on..OOFDM technology can be combined with high order modulation technology, wavelength division multiplexing (WDM) and polarization multiplexing (PDM), so as to improve the transmission rate, dispersion tolerance and capacity of optical fiber transmission system. Based on the application of OOFDM in WDM-PON system, intensity modulation / direct detection (IMDD) and coherent optical detection single mode optical fiber transmission system, all optical OFDM (AO-OFDM) system, and data center multimode optical fiber transmission system, four new technologies in OOFDM are proposed and applied to the optical fiber transmission system respectively. The theoretical simulation is carried out, and the relevant experiments are carried out to verify the proposed theory. The main innovations are summarized as follows: 1. the WDM-PON and IMDD fiber transmission systems based on partial subcarrier vacancy OFDM (PCF-OFDM) technology are proposed. The nonlinear effect of PCF-OFDM on four wave mixing (FWM) in optical fiber transmission is studied by theoretical analysis and system simulation. Through the experiment of IMDD fiber transmission system based on PCF-OFDM, the theoretical analysis and system simulation are verified. The results show that the PCF-OFDM with uniform spaced subcarrier distance can better suppress the nonlinear effect of FWM and the influence of the noise caused by direct detection..2. can transform the wavelet packet transform (WPT) in the optical fiber communication system (WPT). Instead of FFT transform, it is used in the orthogonal modulation of subcarriers in OFDM technology. That is, WPT-OFDM. is used to simulate the system of IMDD WPT-OFDM and coherent WPT-OFDM fiber transmission system. The result shows that it is feasible to apply WPT-OFDM to the optical fiber transmission system and can be used as an alternative for OOFDM Technology; in the coherent WPT-OFDM optical fiber system, it can be used as an alternative to the optical fiber transmission system. In the study, the simulation analysis of the length of the different orthogonal mirror filter (QMF) group and the WPT transform of different wavelet families is carried out respectively, and the transmission performance of the coherent optical OFDM (CO-OFDM) transmission system based on the traditional FFT transform is compared. The results show that the partial wavelet mother function can be used instead of FFT for the optical fiber transmission system and through IMDD WPT-OFDM light. The results of the theoretical simulation are verified by the fiber transmission system experiment. The result proves that the feasibility of the transmission of IMDD WPT-OFDM in the optical fiber system is that the receiver can not receive high speed signal due to the restriction of the electronic bottleneck in the high speed fiber transmission system. The structure of the asymmetric receiver / transmitter system based on the AO-OFDM technology is proposed. In the high speed AO-OFDM fiber transmission system, the receiver uses multiple general commercial coherent receivers to carry out parallel reception of AO-OFDM signals to achieve high speed AO-OFDM signal reception using the existing lower bandwidth coherent receivers. In the scheme, the AO-OFDM signal is divided into several parts with equal bandwidth through the band pass filter (OBPF). Each signal is received by a universal coherent receiver, and the OBPF bandwidth is matched with the receiver's receiving bandwidth. At the same time, all optical FFT (OFFT) transforms are implemented by multistage cascade MZDIs to realize the optical domain demultiplexing of the AO-OFDM signal. Based on the existing PDM-QPSK single carrier system, the long range of the Tb/s fiber transmission system is successfully implemented and implemented. In the case of a colorless compensation fiber, the system is analyzed for the damage caused by the optical gate sampling. On the existing FPGA based real-time IMDD OFDM optical fiber transmission system experiment platform, the intelligent experimental platform is proposed and designed. The automatic adaptive bit allocation can be realized through the intelligent testing platform. The experimental platform not only simplifies the experimental design of the advanced OOFDM transceiver in the future, but also provides more convenient.5. and experimental verification for the vertical cavity surface emitting laser based on the non temperature controlled direct modulation optical injection locking. (OIL-VCSEL) a optical fiber transmission system designed for a real-time dual band OOFDM transceiver, the effective bandwidth and spectrum response of OIL-VCSEL can be adjusted in the optical domain (primary laser injection wavelength and light power, polarization control) and electric domain (VCSEL bias current). The OM2 multimode fiber of adaptive OOFDM signal in IMDD is realized by using a DAC/ADC with a low sampling rate of 4 GS/s. At the same time, the changes in the total transmission rate of the system are further studied because the changes in the OIL condition will bring about significant changes in the frequency response within the bandwidth of the effective modulation bandwidth of the OIL-VCSEL.

【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.11
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本文編號(hào)：1819904