摘要
针对相位干涉仪仅能处理窄带信号的不足，文章提出了一种基于时延拟合的宽带LFM信号干涉仪测向算法，将干涉仪用于对宽带信号的测向。在分析各基线接收到的宽带LFM信号各频点相位差关系的基础上，通过时延拟合的方法，估计出各基线上宽带LFM信号中心频点的相位差，进而用相位干涉仪的方法估计出宽带信号的来波方向。仿真实验结果表明：该算法较仅采用若干频点进行相位差平均的方法具有更高的测向精度，且算法简单，运算量小，具有一定的工程应用价值。
As the traditional phase interferometer has the deficiency of just processing narrow- band signals, a novel wideband LFM signal delay fitting algorithm based on intefferometer is pro- posed in this paper, which applies the interferometer technique into wideband signal DOA estima- tion. After the phase difference relationship analysis of wideband LFM signals＇ each frequency point, the phase difference of center frequency point is obtained using the delay fitting approach, then the DOA is got through the interferometer technique. Simulation results show that the algo- rithm has higher precision than using only certain frequencies for phase averaging method, and it has a certain practical value for its simpler method and lower calculation amount.
出处
《电子对抗》
2014年第2期17-20,共4页
Electronic Warfare
