背景噪声下多维正交包络信号的最优量子接收  

Optimal Quantum Reception of Multidimensional Orthogonal Envelope Signal with Background Noise

作　　者：廖勇[1] 杨士中[1] 杨宏[1] 魏海波[1] 

机构地区：[1]重庆大学飞行器测控与通信教育部重点实验室,重庆400044

出　　处：《北京邮电大学学报》2012年第5期6-9,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：中国工程院院士重点咨询项目;中国空间技术研究院西安分院自主研发课题

摘　　要：针对存在背景噪声信号下,多维正交包络信号在量子接收机下性能尚不清楚的问题,采用多维空间递推生成法则对多维正交包络信号进行接收处理,同时使用绕轴旋转方式减小接收到的光子信号状态和测量状态之间的夹角,达到量子接收机的最优检测设计,并统一了多维正交包络信号下最大正确检测概率的计算表达式.数值分析结果表明,在有背景噪声的影响下,用空间绕轴旋转方式接收多维正交包络信号比直接检测方法能更好地减小误比特率和误符号率,可提高接收机的检测性能.Aiming at that the multidimensional orthogonal envelope signal performance under quantum reception is still unclear with the existence of background noise,the multidimensional space recursive law is used to receive multidimensional orthogonal envelope signal.Simultaneously,the angle between received photon signal state and measuring state is reduced by a pivoting way to achieve the optimal detection design of quantum receiver.Also,the expression of maximum correct detection probability under multidimensional orthogonal envelope signal is unified.Numerical analysis indicates that,compared with the direct direction way,the space pivoting way to receive multidimensional orthogonal envelope signal can improve the receiver direction performance when influenced by background noise because it reduces the bit error rate and the symbol error rate.

关 键 词：自由空间光通信 量子通信 信号检测 量子检测理论 

分 类 号：TN929.13[电子电信—通信与信息系统]