摘要
针对现有方法难以有效检测多分量雷达辐射源信号(multi-component emitter signal,MCES)的问题,提出一种SHE(S-metbod,Hough-transform and elimination-method)检测新方法。该方法引入S-method计算信号的时频分布,采用Hough变换检测调频斜率,通过提出的时频面消除法实现信号分量的逐次提取和参数检测。SHE方法计算复杂度低,容噪能力强,易实现在线检测。仿真实验结果表明:SHE方法能准确检测MCES中各信号分量起止时间和瞬时频率,不易受交叉项干扰,脉宽检测精度大于98.030%,带宽检测精度大于96.430%,信噪比降低到-5 dB时仍然保持高检测精度。
To solve the problem that the existing methods cannot detect multi-component emitter signals effectively, a novel detection method called SHE （S-method, Hough-transform and elimination-method） is proposed. S-method is introduced to compute the time frequency distribution, Hough transform is applied to detecting the frequency slope, an elimination method in time-frequency plane is proposed to extract and detect parameters of signal component one by one. SHE has good performances of low computational complexity, strong noise suppression capability and easy online detection. Simulation experiments show that SHE is able to accurately detect the instantaneous frequency and the time of arrival and termination of each signal component and eliminate cross-term disturbance, its detection preeisions of pulse width and bandwidth are more than 98. 030% and 96. 430% respectively, and the method has strong detection ability even when the signal-to-noise ratio decreases to -5 dB.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2009年第9期2096-2100,共5页
Systems Engineering and Electronics
基金
国家自然科学基金(60702026
60572143)
四川省青年科技基金(09ZQ026-040)资助课题
