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The ISAR image will be blurred using the traditional range-Doppler algorithm for imaging maneuvering targets. Time frequency analysis is an effective method for solving this problem. On the basis of analyzing the radar echopsilas Doppler frequency time-varying characteristic with complex maneuvering in detail, a new adaptive kernel time frequency(More)
In this paper, we propose an original strategy for estimating sinusoidal frequency-modulated (FM) signal. This paper derives the cyclic autocorrelation function of sinusoidal FM signal using its character of cyclostationary, and estimates the parameters of modulation frequency, modulation index and amplitude. Compared with conventional time-frequency(More)
We demonstrate a fiber-optic acoustic emission (AE) sensor system that is capable of performing AE detection, even when the sensor is experiencing large quasi-static strains. The sensor is a Fabry-Perot interferometer formed by cascaded chirped fiber-Bragg gratings (CFBGs). The reflection spectrum of the sensor features a number of narrow spectral notches(More)
This paper studies on the cone target. Firstly, the modulating function of a precession target on the radar is analyzed. Then, the decomposition method of multi-component sinusoidal frequency modulated signal based on empirical mode decomposition (EMD) is studied. The instantaneous frequency of each intrinsic mode function is gained by using Hilbert(More)
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