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动物回声定位使用了双曲调频形式的超声波。深入分析了宽带双曲调频信号的时间尺度和时间平移的互换效性。以自小波变换为工具,推导了矩形包络双曲调频信号的时间-尺度峰脊特性。作为比较,对线性调频信号进行了时间-尺度分析。仿真结果验证了宽带双曲调频信号的自小波变换直线峰脊特性优于线性调频信号。实时仿真结果表明了宽带双曲调频信号在水下信号处理中的应用前景。
Echolocation uses hyperbolic FM ultrasound. In-depth analysis of the broadband hyperbolic FM signal time scale and the time shift of the exchange efficiency. From wavelet transform to tool, the time-scale peak ridge characteristics of rectangular enveloped hyperbolic FM signals are deduced. As a comparison, the chirp signal was analyzed in time-scale. The simulation results show that the self-wavelet transform linear peak ridge of broadband hyperbolic FM signal is better than the chirp signal. Real-time simulation results show that the application of broadband hyperbolic FM signal in underwater signal processing.