空间光通信系统中量子接收机的设计与分析

发布时间：2018-04-15 18:07

本文选题：经典接收机 + 量子接收机　；参考：《中国科学技术大学》2014年博士论文

【摘要】：目前为止,激光通信系统中得到工程化应用的接收机都是经典接收机,经典接收机以经典电动力学和经典检测与估计理论为基础,其误符号率的性能极限称为标准量子极限。已有的研究表明,从量子电动力学和量子检测与估计理论出发,能够设计出误符号率可以突破标准量子极限的量子接收机。量子接收机误符号率的性能极限称为Helstrom极限,与标准量子极限相比,Helstrom极限在性能上有很大程度的提升。自从上世纪六十年代末人们获得对Helstrom极限的认知以来,如何从物理上实现量子接收机,使其误符号率能够突破标准量子极限并不断逼近Helstrom极限,一直吸引着广大研究者的目光。长期以来,受限于技术发展水平,量子接收机物理实现方案的研究进展缓慢,直到最近几年才取得了一些突破性的成果。尽管如此,当下关于量子接收机的研究仍然停留在实验演示验证阶段,要想使得量子接收机在激光通信系统中得到工程化应用,还有不少问题需要深入研究。在本论文中,我们首先回顾了信息技术和激光通信系统中的接收机从经典到量子的发展历程,接着介绍了激光通信系统中接收机设计的理论基础。在此基础之上,本论文深入研究了空间光通信系统中量子接收机的设计与分析,主要工作包括： (1)二元调制激光通信系统中的量子接收机。以包含接收机各器件非理想性的最优位移量子接收机模型为基础,我们获得了包含接收机各器件非理想性的分区检测量子接收机的解析模型。从该模型出发,我们分析了探测器量子效率η、探测器暗计数v、波束分束器损耗τ、本振场与信号场模式失配ξ等接收机器件非理想性对分区检测量子接收机性能的影响。针对不同分区策略,我们对分区检测量子接收机的性能进行了仿真,通过对不同分区策略下仿真结果的对比研究,给出了工程实践中选择分区策略的基本原则。 (2)多元调制激光通信系统中的量子接收机。首先,针对M-ary PSK调制,我们得到了包含接收机各器件非理想性的ON-OFF探测分区自适应测量量子接收机的概率仿真模型。从该模型出发,通过蒙特卡罗仿真,我们分析了各器件非理想性对QPSK调制和8-PSK调制ON-OFF探测分区自适应测量量子接收机性能的影响。在此基础上我们指出,使用具有光子数分辨能力的单光子探测器(PNRD),可以有效抑制本振场与信号场模式失配ξ对该量子接收机性能的影响,并对PNRD光子数分辨能力不同时该量子接收机的性能进行了仿真。接下来,我们将分区自适应测量量子接收机应用于QAM调制信号的量子接收,详细分析了不同条件下16-QAM调制分区自适应测量量子接收机的性能。最后,为了能够只使用ON-OFF单光子探测器而不使用PNRD,并且采用较少的分区数目来突破16-QAM调制的标准量子极限,我们在深入研究QPSK调制经典-量子混合接收机的基础上,提出了针对16-QAM调制的经典-量子混合接收机。 (3)自由空间激光通信系统中大气湍流效应对量子接收机性能的影响。我们首先回顾了大气湍流效应的建模方法。在此基础之上,结合无湍流时量子接收机的误符号率,我们给出了分析大气湍流效应对量子接收机性能影响的方法。最后,作为一个实例,我们给出了考虑了大气湍流效应之后,QPSK调制ON-OFF探测分区自适应测量量子接收机的性能曲线。
[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

【学位授予单位】：中国科学技术大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TN929.1;TN851

【参考文献】