The invention discloses an FMCW
radar distance and speed joint
estimation method based on all-phase
Fourier transform, and relates to the technical field of
radar signal processing, and provides a three-point
frequency deviation estimator based on apFFT in order to solve the problem that in the prior art, an FMCW
radar is poor in
estimation precision of the target distance and speed. A three-pointfrequency deviation estimator based on apFFT is provided, the
frequency deviation of a spectral peak can be estimated from an all-phase
frequency spectrum of a
signal sequence, and compared with a simple apFFT
algorithm, the frequency
estimation precision of the
signal is improved; interpolation calculation and iterative calculation of an all-phase
frequency spectrum are avoided, and the calculation complexity of the
algorithm is effectively reduced compared with Li-
algorithm; and the detection of the FMCW radar on the target distance and speed depends on the estimation of the
intermediate frequency and phase of the
echo signal, the estimation precision of the phase of the
echo signal is improved by using the apFFT, and the estimation precision of the frequency of the
echo signal is improved by using the three-point
frequency deviation estimator, so that the estimation precision of the FMCW radar on the target distance and speed is improved.