Linear frequency modulation (FM) signal parameter estimation method based on small-wave-packet denoising and power spectral entropy
A linear frequency modulation signal and parameter estimation technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as large amount of calculation, complex algorithm, and difficult engineering implementation, and achieve the effect of small amount of calculation and real-time estimation
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[0047] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0048] combine Figure 1-9 , the signal model of the LFM signal is:
[0049]
[0050] Among them, f 0 is the center frequency of the signal, k is the FM slope of the signal, and x(t) represents the LFM signal.
[0051] The LFM signals used in the realization of the project are of finite length:
[0052]
[0053]
[0054] The envelope of the finite LFM signal is a rectangular function, A is the amplitude of the rectangular function, the time width of the rectangular function is T, and the bandwidth B is the signal bandwidth, the time-width-bandwidth product The instantaneous frequency ω(t) has a linear transformation relationship with time:
[0055]
[0056] The LFM signal parameter estimation method to which the present invention belongs, the complete calculation process is as follows figure 1 Shown: LFM signal simulation parameter setting: bandw...
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