本文選題：經(jīng)典接收機 + 量子接收機��； 參考：《中國科學技術大學》2014年博士論文

【摘要】：目前為止,激光通信系統(tǒng)中得到工程化應用的接收機都是經(jīng)典接收機,經(jīng)典接收機以經(jīng)典電動力學和經(jīng)典檢測與估計理論為基礎,其誤符號率的性能極限稱為標準量子極限。已有的研究表明,從量子電動力學和量子檢測與估計理論出發(fā),能夠設計出誤符號率可以突破標準量子極限的量子接收機。量子接收機誤符號率的性能極限稱為Helstrom極限,與標準量子極限相比,Helstrom極限在性能上有很大程度的提升。自從上世紀六十年代末人們獲得對Helstrom極限的認知以來,如何從物理上實現(xiàn)量子接收機,使其誤符號率能夠突破標準量子極限并不斷逼近Helstrom極限,一直吸引著廣大研究者的目光。長期以來,受限于技術發(fā)展水平,量子接收機物理實現(xiàn)方案的研究進展緩慢,直到最近幾年才取得了一些突破性的成果。盡管如此,當下關于量子接收機的研究仍然停留在實驗演示驗證階段,要想使得量子接收機在激光通信系統(tǒng)中得到工程化應用,還有不少問題需要深入研究。 在本論文中,我們首先回顧了信息技術和激光通信系統(tǒng)中的接收機從經(jīng)典到量子的發(fā)展歷程,接著介紹了激光通信系統(tǒng)中接收機設計的理論基礎。在此基礎之上,本論文深入研究了空間光通信系統(tǒng)中量子接收機的設計與分析,主要工作包括： (1)二元調(diào)制激光通信系統(tǒng)中的量子接收機。以包含接收機各器件非理想性的最優(yōu)位移量子接收機模型為基礎,我們獲得了包含接收機各器件非理想性的分區(qū)檢測量子接收機的解析模型。從該模型出發(fā),我們分析了探測器量子效率η、探測器暗計數(shù)v、波束分束器損耗τ、本振場與信號場模式失配ξ等接收機器件非理想性對分區(qū)檢測量子接收機性能的影響。針對不同分區(qū)策略,我們對分區(qū)檢測量子接收機的性能進行了仿真,通過對不同分區(qū)策略下仿真結果的對比研究,給出了工程實踐中選擇分區(qū)策略的基本原則。 (2)多元調(diào)制激光通信系統(tǒng)中的量子接收機。首先,針對M-ary PSK調(diào)制,我們得到了包含接收機各器件非理想性的ON-OFF探測分區(qū)自適應測量量子接收機的概率仿真模型。從該模型出發(fā),通過蒙特卡羅仿真,我們分析了各器件非理想性對QPSK調(diào)制和8-PSK調(diào)制ON-OFF探測分區(qū)自適應測量量子接收機性能的影響。在此基礎上我們指出,使用具有光子數(shù)分辨能力的單光子探測器(PNRD),可以有效抑制本振場與信號場模式失配ξ對該量子接收機性能的影響,并對PNRD光子數(shù)分辨能力不同時該量子接收機的性能進行了仿真。接下來,我們將分區(qū)自適應測量量子接收機應用于QAM調(diào)制信號的量子接收,詳細分析了不同條件下16-QAM調(diào)制分區(qū)自適應測量量子接收機的性能。最后,為了能夠只使用ON-OFF單光子探測器而不使用PNRD,并且采用較少的分區(qū)數(shù)目來突破16-QAM調(diào)制的標準量子極限,我們在深入研究QPSK調(diào)制經(jīng)典-量子混合接收機的基礎上,提出了針對16-QAM調(diào)制的經(jīng)典-量子混合接收機。 (3)自由空間激光通信系統(tǒng)中大氣湍流效應對量子接收機性能的影響。我們首先回顧了大氣湍流效應的建模方法。在此基礎之上,結合無湍流時量子接收機的誤符號率,我們給出了分析大氣湍流效應對量子接收機性能影響的方法。最后,作為一個實例,我們給出了考慮了大氣湍流效應之后,QPSK調(diào)制ON-OFF探測分區(qū)自適應測量量子接收機的性能曲線。
[Abstract]:So far, the engineering application of the receiver laser communication system is the classical classic receiver, receiver based on classical electrodynamics and classical detection and estimation theory, the symbol error rate performance limit is called the standard quantum limit. Some research indicated that, from the point of view of quantum electrodynamics and quantum detection and estimation theory to design quantum receiver symbol error rate can exceed the standard quantum limit. The performance limit receiver symbol error rate of quantum limit is called Helstrom, compared with the standard quantum limit, the limit of Helstrom has greatly improved in performance. Since the end of 60s of last century people gain access to the Helstrom limit of cognition, how to realize quantum physics from the receiver. The symbol error rate is able to break the standard quantum limit and approaching the Helstrom limit, has been attracting many researchers. Light. For a long time, due to the technology development level, quantum receiver physical realization scheme of slow progress, until recent years has made some achievements. However, the current research on quantum receiver still remain at the experimental demonstration stage, in order to make the receiver get Quantum Engineering Application in laser communication system there are a lot of problems in need of further study.
In this paper, we first review the information technology and laser communication system receiver development process from classical to quantum, then introduced the theoretical basis of the design of the receiver laser communication system. On this basis, this paper further studies the design and analysis of space optical communication system in quantum receiver, including:
(1) two yuan modulated laser receiver quantum communication system. The receiver device to contain non ideal quantum optimal displacement receiver model as the basis, we obtain the analytical model including the non partition detection device of receiver receiver of quantum ideal. Based on this model, we analyzed the quantum efficiency of the detector. The detector. The dark count V, beam splitter loss tau, the vibration field and the signal field mode mismatch receiving device. The non ideal performance of the receiver. The influence of quantum partition detection for different partitioning strategies, we partition test sub receiver performance is simulated. By comparing the simulation results of different partitioning strategies the basic principle of selecting partitioning strategy is given in the engineering practice.
(2) quantum multiple receiver modulated laser communication system. Firstly, according to the M-ary PSK modulation, we get the receiver of each device contains non probabilistic simulation model of ideal ON-OFF detection receiver. Quantum partition adaptive measurement based on this model, by Monte Carlo simulation, we analyzed the influence of non ideal devices on the performance of adaptive quantum measurement receiver partition QPSK and 8-PSK modulation of ON-OFF detection. Then we pointed out that Dan Guangzi has the ability to distinguish the photon detector (PNRD), can effectively suppress the vibration and signal fields. The influence of mode mismatch quantum receiver, and the photon number resolving performance of PNRD and the ability of quantum receiver is simulated. Then, we will measure the Quantum Quantum partition adaptive receiver applied to QAM modulation signal receiving, detailed analysis Under different conditions of 16-QAM modulation and adaptive partition measurement of quantum receiver performance. Finally, PNRD is not used for can only use ON-OFF single photon detector, standard quantum limit and the number of partitions less to break through the 16-QAM modulation, we based on in-depth study of QPSK modulation classical quantum mixed receiver, put forward to 16-QAM modulation of the classical quantum mixed receiver.
(3) the atmospheric turbulence effects of free space laser communication system of quantum receiver performance. We first reviewed the effects of atmospheric turbulence modeling method. On this basis, combined with the symbol error rate of quantum turbulence free receiver, we give a method of performance analysis of atmospheric turbulence effects on quantum receiver. Finally, as a as an example, we are considering the effects of atmospheric turbulence, the performance curve of QPSK modulation ON-OFF detection receiver. Quantum measurement adaptive partition

【學位授予單位】：中國科學技術大學
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TN929.1;TN851

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相關期刊論文 前1條

1 趙生妹,李飛,鄭寶玉;基于量子特性的多用戶檢測技術[J];信號處理;2004年05期

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本文編號：1755203