Suppressing HRRP grating lobes in stepped-frequency train of LFM pulses using extended correlation

Suppression of grating lobes in stepped frequency LFM pulse train using PSO

“…The particles are randomly initialized in the defined search space [2,15] and c ∈ [1,10]. The velocities are generated randomly from the search space [1,10]. The values of c 1 and c 2 are taken as 2 and that of w is 0.4.…”

“…These grating lobes appear in the form of high spikes and hence reduce the range resolution capability of LFM pulse train. Different techniques for acceptable suppression or complete rejection of grating lobes are dealt in [1][2][3][5][6][7][8]. Maron [6,7] has proposed to use variable pulse widths to suppress the grating lobes but it leads to loss of periodicity of pulse train.…”

“…Rabideau [8] has proposed a technique to generate nonlinear synthetic wideband waveform which has yielded enhanced performance in terms of higher range resolution, lower sidelobe and reduced grating lobes due to non-uniform distribution of energy over the desired frequency band. In [1] a novel extended correlation method is proposed to suppress the grating lobes without loss of any range resolution. LFM pulses are replaced by nonlinear LFM * Corresponding author.…”