Abstract
This paper studies the long time coherent integration (LTCI) algorithm in frequency modulation continuous wave (FMCW) radar for weak maneuvering target detection. A new coherent integration algorithm, called FMCW Radon-Fourier transform (FMCW-RFT), is proposed. This algorithm eliminates range migration (RM) via two-dimensional searching in range-velocity parameter space, removes range-velocity coupling (RVC) in FMCW radar via phase compensation function (PCF) and achieves coherent integration. The addressing operation and the phase compensation operation of FMCW-RFT are different from the existing Radon-Fourier transform based on pulse Doppler (PD-RFT) radar due to different radar systems. Finally, some simulations confirm the effectiveness of FMCW-RFT. The results show that FMCW-RFT performs better than PD-RFT and two-dimensional fast Fourier transform (2D-FFT) on integration gain and detection ability in low signal-to-noise ratio (SNR) scenario.
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