Movement Detection Using a Modified FMCW Waveform and GNU Radio

In this paper results of previous researches and modifications to the Frequency Modulated Continuous Wave (FMCW) are applied on GNU Radio. GNU Radio is an open source software for Software Defined Radio (SDR). The standard FMCW has frequency changing linearly with time. The frequency changes take the form of a triangle. Here, the triangular waveform is modified to obtain two triangles instead of one where the second triangle has a different form. The system is implemented using GNU Radio. We obtained a good estimation of the distance and the speed of different targets. Moreover, the Doppler frequency is estimated with a high precision. Keywords—FMCW; Detection; Estimation; GnuRadio; Radar

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