学科分类
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1 个结果
  • 简介:Anadaptiveapproachtoselectanalysiswindowparametersforlinearfrequencymodulated(LFM)signalsisproposedtoobtaintheoptimal3dBsignal-to-noiseratio(SNR)intheshorttimeFouriertransform(STFT)domain.AfteranalyzingtheinstantaneousfrequencyandinstantaneousbandwidthtodeducetherelationbetweenthewindowlengthanddeviationoftheGaussianwindow,high-orderstatisticsisusedtoselecttheappropriatewindowlengthforSTFTandgettheoptimalSNRwiththerighttime-frequencyresolutionaccordingtothesignalcharacteristicunderafixedsamplingrate.Computersimulationshaveverifiedtheeffectivenessofthenewmethod.

  • 标签: STFT 调频信号 窗口 长度 定量分析 信噪比