Real-time signal reconstruction for pulse Doppler radar clutter

For pulse Doppler radar to detect the target signal which is spectrally separated from clutter, it is required in missile hardware-in-the-loop that the noise resulted by clutter reconstruction architecture should be 60 dB lower than the main-lobe clutter. Because of the restriction, a new method of clutter reconstruction is proposed, which includes conversion from power spectrum to vector spectrum, randomization of phase, inverse Fourier transform, and then windowing and overlapping the series time domain sequence, so as to guarantee the continuous expectation value and variance of random sequence. Simulation results demonstrate that the ratio of signal to noise increases from 30 dB to 60 dB by applying this method.