基于FFT变换的LFM信号检测方法研究  

Research into The Method of LFM Signal Detection Based on FFT Transformation

作　　者：王传虎[1] 邵文建[1] 居易[1] WANG Chuan-hu;SHAO Wen-jian;JU Yi(The 723 Institute of CSIC,Yangzhou 225101,China)

机构地区：[1]中国船舶重工集团公司第七二三研究所,江苏扬州225101

出　　处：《舰船电子对抗》2020年第6期76-82,共7页Shipboard Electronic Countermeasure

摘　　要：分析了快速傅里叶变换(FFT)的点数对线性调频(LFM)脉冲信号频谱分析效果的影响,并推导了对于LFM脉冲信号,FFT变换的最优点数需要满足的条件。该条件仅与采样率以及信号调频速率有关。通过仿真验证了结论的正确性。This paper analyzes the effect of fast Fourier transform(FFT)points on spectrum analysis of linear frequency modulation(LFM)pulse signal,and deduces the conditions that the optimal points of FFT should meet for LFM pulse singal.These conditions only depend on sampling rate and signal frequency medulation rate.The conclusion is verified through simulation in this paper.

关 键 词：快速傅里叶变换 线性调频信号 最优点数 

分 类 号：TN971.1[电子电信—信号与信息处理]