基于SIF模式特性的曼彻斯特改进算法  

An Improved Manchester Decoding Algorithm Based on SIF Mode Feature

作　　者：李丞 张玉 唐波[1] 刘垒 LI Cheng;ZHANG Yu;TANG Bo;LIU Lei(School of Electronic Countermeasure,National University of Defense Technology,Hefei 230037,China)

机构地区：[1]国防科技大学电子对抗学院,合肥230037

出　　处：《火力与指挥控制》2018年第4期42-47,共6页Fire Control & Command Control

基　　金：国家自然科学基金(61201379);安徽省自然科学基金资助项目(120805QF103)

摘　　要：针对解决二次监视雷达(SSR)应答信号基于曼彻斯特编码特性分选时,会出现因混扰信号中包含SIF模式信号而不能完全分选,在基于曼彻斯特算法的基础上提出改进算法。该算法首先根据信号模式特征之间的不同,对混扰信号进行针对性预处理。然后通过求解得出分离矩阵,以实现对混扰信号中的SIF模式部分进行有效分选。最后对非SIF模式类信号进行分选。仿真验证表明,该改进算法在低信噪比时可以有效进行混模式信号分选,且其性能在相较同类算法时具有更好的抗噪性能与分选性能。To overcome decoding errors problem of secondary surveillance radar(SSR)due to the phenomenon of different modes signals including SIF mode signals garbling,an improved algorithm based on the Manchester encoding property of mode S is proposed for separating the garbled replies.Firstly,the garbling signals are pre-conducting based on the features of different modes.Then a method is proposed to solve for the separation matrix,and the SIF signals in garbled signals can be de-garbled.Last the other signals can be de-garbled too.Numerical simulations show that the improved algorithm maintains good separation performance in the low SNR case,and its performance is better in separation and anti-noise when in the same time delay than same algorithms.

关 键 词：二次雷达 信号分选 曼彻斯特编码 SIF模式 

分 类 号：TN958.96[电子电信—信号与信息处理]