一种空潜蓝绿激光通信双盲均衡方法  

A Double-Blind Equalization Method for Air-Submarine Blue-Green Laser Communication

作　　者：毛忠阳 徐雪颖 陆发平 沙丹丹 MAO Zhongyang;XU Xueying;LU Faping;SHA Dandan(Naval Aviation University,Yantai Shandong 264001,China)

机构地区：[1]海军航空大学,山东烟台264001

出　　处：《海军航空大学学报》2023年第5期375-381,共7页Journal of Naval Aviation University

基　　金：国家自然科学基金(61701518);山东省“泰山学者”建设工程专项经费(ts20081130)。

摘　　要：空潜蓝绿激光通信系统容易受到信道多径效应的影响,从而发生码间干扰,严重影响系统性能。通过对空潜蓝绿光通信系统信道进行剖析,基于蓝绿激光衰减特性和时域展宽特性,将可变步长恒模分数间隔均衡算法和判决导向最小均方算法相结合,提出了1种适合空潜蓝绿激光通信的双模盲均衡方法。所提方法相较于CMA盲均衡、CMA+DD-LMS均衡以及CLMS均衡等常规均衡方法,能够获得更小的均方误差和更快的收敛速度,具有更好的均衡性和抗噪声性能,可有效提高系统性能。当系统误码率为10-4时,性能最高可提升约1.8 dB。The air-submarine blue-green laser communication system is prone to channel multipath effect,causing intersymbol interference,and the system performance is seriously affected.By analyzing the channel of air-submarine bluegreen laser communication systems,based on the attenuation characteristics and time-domain broadening characteristics of blue-green laser,a variable-step constant modulus fractional interval equalization algorithm and a decision-guided least mean square algorithm are combined to propose a dual mode blind equalization method suitable for air-submarine bluegreen laser communication.Compared to conventional equalization methods such as CMA blind equalization,CMA+DDLMS equalization and CLMS equalization,the proposed method can achieve smaller mean square error and faster convergence speed,and has better equalization and anti-noise performance,effectively improving system performance,with the maximum performance improvement of about 1.8 dB when the system bit error rate is 10-4.

关 键 词：蓝绿激光 空潜通信 盲均衡算法 码间干扰 

分 类 号：TN911.3[电子电信—通信与信息系统]