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A new parameter estimation of LFM signal is presented. First it is assumed that delay multiplication and the Fourier transform can be employed to get a rough estimation of the frequency rate of the LFM signal, for determining a approximate range of the LFM signal's rotation angle in the fractional Fourier domain, and then the exact frequency rate and initial frequency are obtained through the optimum...
In many ways about solving the large workload estimation of LFM signal in the FrF Domain, the 2D peak searching algorithm is much more complex. This paper presents an FrFT modulus detector via MLS curve-fitting optimization technique, which can simplify the 2D peak searching to a problem of 1D curve fitting. And for multi-component signals, we further introduce a Gaussian mixture model (GMM) to approximate...
This paper presents a new method for the detection and parameter estimation of multicomponent LFM signals based on the fractional Fourier transform. For the optimization in the fractional Fourier domain, an algorithm based on Quasi-Newton method is proposed which consists of two steps of searching, leading to a reduction in computation without loss of accuracy. And for multicomponent signals, we further...
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