Method to Improve Range Resolution of Phase-Shift Keying Radar
The analysis of the modern solutions in the area of building multiband radars has been performed, and the method for qualitative improvement of such systems technical characteristics due to the system approach to synthesis and processing of signals has been proposed. The method is based on using the fast Fourier transform to expand the initial wideband pulse into N components, which, in their turn are applied in the system as the modeling signals. The algorithm of processing of the received signals, which provides the harmonics gathering and by that the range resolution increase, has been shown. The results of the experimental proof of the method efficiency have been given. The experiment performed has shown a 7 times initial pulse width decrease with usage of N =13 harmonics. The results of its application have shown a 8% resolution improvement and an 0.7 dB main lobe magnitude increase with a slight sidelobes increase.