Modified Price Nonlinear Frequency Modulated Waveform for Improved Performance

초록

A modified Price formula nonlinear frequency curves for pulse compression with ultra-low sidelobe level (SLL) and efficient use of the frequency spectrum is proposed. Although the frequency curve of the original Price formula is known to give a relatively low remaining SLL, this level is not suitable for applications such as meteorological radar, which needs to detect tiny targets in a dense and widespread cluttered environment. This paper introduces new parameters for obtaining an ultra-low SLL. After a parameter study, hybrid optimization based on the genetic algorithm and the Nelder-Mead search was used for finding the optimal solution. In this method, even without amplitude windowing, an SLL lower than -100 dB could be achieved with time-bandwidth product of 200. In addition, another design with a one-sided occupied spectrum (f_{-90\text{dB}}) of only 32.85 MHz and a Doppler tolerance of -0.24 dB was made. © 1994-2012 IEEE.

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