双曲线性调频信号参数的约束关系和估计

摘要

双曲线性调频（HFM ）信号是声纳信号中多普勒容限最大的信号，但是鲜有文献对该信号进行深入研究。论文研究了双曲调频信号的预包络表达式和复包络表达式，并给出了与信号的中心频率、带宽和脉冲宽度三个波形参数的关系，便于波形产生和声纳性能预估。结合主动声纳常用的参数选取，比较了 HFM 与线性调频（LFM ）信号的宽带模糊函数性能，表明对于主动声纳来说，HFM 的性能与 LFM 相近，LFM 信号时间和频率分辨率略有下降。%Hyperbolic linear frequency modulation signal has the most doppler tolerance in all of the sonar signal so far , but there is little thorough research on the signal .This paper studies the pre envelope expression of the HFM signal and the complex envelope expression ,and builds contact the expressions with the center frequency ,bandwidth and pulse width of the signal .These connections is conducive to generate the waveforms and evaluate the performance of HFM signal of sonar .Fi‐nally ,the paper compares the performance of ambiguity function of the wideband HFM and LFM signal under the conditions of the common parameters of active sonar .The results show that HFM and LFM signal have the similar performance ,but the time and frequency resolution of LFM signal decrease slightly .