基于魏格纳-威尔分布的脉冲干扰效果评估方法  

A New Method for Performance Evaluation of Pulsed Interference Based on Wigner-Ville Distribution

作　　者：杨杰[1] 徐静影 职如昕[1] 韩冰洋 YANG Jie;XU Jing-ying;ZHI Ru-xin;HAN Bing-yang(School of Information and Electronics,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《北京理工大学学报》2018年第7期759-765,共7页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(61271258)

摘　　要：针对通信电子战中脉冲干扰效果的评估问题,利用由脉冲干扰突发性和干扰载波频偏相偏引起的时间-频率域上的非平稳特性,基于时频分析工具魏格纳-威尔分布,提出目标信号与干扰信号的平均有效相关功率密度指标.通过典型通信体制环境下的仿真结果表明:干扰功率较强时,该指标能够有效反映脉冲干扰效果与信干比的关系,并正确区分脉宽小于和大于一个信息比特两种情况.该评估方法直接适用于各种形式的脉冲干扰,在通信方和干扰方具有相互隐藏特性的电子对抗环境中,能够对脉冲干扰效果进行有效分析.To evaluate pulse interference performance in digital communication countermeasure,a new parameter measuring the average effective correlation power density between the target signal and the interfering signal was presented based on the time-frequency analysis tool,WignerVille distribution, making use of the abruptness of the pulsed interference and the nonstationarity brought by the frequency offset and the phase offset of its carrier.Simulation results in typical communication systems show that the new parameter is capable of effectively reflecting the relation between pulsed interference performance and SIR（signal to interference ration）,and correctly distinguishing interfering pulses with pulse widths smaller and larger than one information bit.The proposed method is directly applicable to pulsed interferences with different formats and can effectively analyze pulsed interference performance even where the communicating side and the interfering side are hidden to each other.

关 键 词：脉冲干扰 干扰效果评估 非平稳特性 魏格纳-威尔分布 

分 类 号：TN973.1[电子电信—信号与信息处理]