防空雷达飞机目标调制周期特征的研究  

Study on the Periodic Signature Modulated by Rotating Structure of Aircraft in the Air-Defense Radar

作　　者：丁建江[1] 张贤达[1] 

机构地区：[1]清华大学自动化系

出　　处：《电子学报》2003年第6期903-906,共4页Acta Electronica Sinica

基　　金：国家自然科学基金资助项目 (No .69772 0 2 3)

摘　　要：基于飞机旋转部件对雷达电磁波调制机理 ,以及对调制参数模型和回波特点的分析理解 ,本文针对防空雷达 ,分析了几种飞机目标的调制周期特征 ,提出了几种调制周期特征分析和提取的方法 .本文的主要贡献是揭示了防空雷达飞机回波复包络中的调制周期特征 ,分析了在不同飞机姿态、不同雷达工作状态下实际回波中调制周期特征的稳定性 ,并讨论了调制周期特征用于辨识螺旋桨飞机的可能性 .实测数据分析结果表明 :本文方法能从防空雷达螺旋桨飞机回波中提取调制周期特征 ,并用于螺旋桨飞机的辨识 .This paper reveals the periodic signature modulated by rotating structure of aircraft in the air-defense radar echoes, and presents some methods of analysis and extraction of the periodic signature, based on induction mechanism, parametric model of modulation and echo characteristics. The stability and reliability of the periodic signature in the actual echoes is analyzed under different conditions including aircraft configuration and orientation, radar parameters and operation. The probability of identification of propellers based on the periodic signature is discussed. The analyzed results demonstrate that the periodic signature is reliably and steadily extracted from the air-defense radar echoes using the proposed methods, and can be used for identification of propellers.

关 键 词：防空雷达 调制周期特征 特征分析与提取 飞机识别 

分 类 号：TN951[电子电信—信号与信息处理] TN957[电子电信—信息与通信工程]