A method for operating a radar device, including ascertaining a matrix with time signals of reflected radar radiation, ascertaining elements of a distance-velocity-power matrix of a radar target from the time signals, carrying out a first discrete one-dimensional Fourier transform for the elements of the distance-velocity-power matrix in a first dimension, and carrying out a second discrete one-dimensional Fourier transform for the elements of the distance-velocity-power matrix in a second dimension in such a way that the second discrete one-dimensional Fourier transform is carried out for each second element of the distance-velocity-power matrix in a mathematically defined offset manner.