基于时频分析的数字射频存储干扰信号检测

摘要

采用数字射频存储器进行信号采集、存储和复制成为干扰脉冲压缩雷达的重要手段.由于传统的时域和频域分析方法不能准确检测线性调频干扰信号,引入了短时傅立叶变换时频分析方法以识别数字射频存储器复制的干扰信号.试验结果表明,该方法可有效识别基于数字射频存储器复制的线性调频干扰信号.%In order to counter the pulse compression radar, using the digital radio frequency memory (DRFM) to sample, store and reproduce the pulse compression signals has become an important means. In allusion to the disadvantages in dealing with the chirp signals with the classical signal processing methods such as time-domain analysis and frequency-domain analysis, this paper introduces short time fourie transform (STFT) into non-stationary signal analysis on DRFM signals. Simulation results show that the method is effective to detect the chirp signals.