Algorithm for Identifying Modulated Modes of FMCW Radar Signals
Yu Liu · Shuju caiji yu chuli · 2005
The algorithm for identifying modulated modes of frequency modulation continous wave (FMCW) radar signals is presented. The time-frequency curve can be obtained by the short-time Fourier transform. The problem on identification of modulated modes is converted into the identification of the type of the periodic curve. Through characteristic analysis, the characteristic of the frequency spectrum of the periodic curve can be obtained. According to the difference between their harmornic components, the type of the periodic curve can be identified. Then the modulated mode of the signal can be confirmed. Simulation results prove that the method can identify the modulated modes of FMCW radar signals. And the algorithm has a good performance when the signal-noise ratio of the input signal is -10 dB.