2008•Computer Engineering and Applications JournalRequires access

New digital method for linear frequency modulated signal generated

SU Zai-jian

Abstract

The Linear Frequency Modulated(LFM) signal is a popular pulse compression radar signal.A new digital method for LFM signal generated is proposed.The LFM signal can be generated by means of two second-order infinite impulse response filters(IIR) computing.At the same time the LFM signal generated in this way with 15 MHz bandwidth and 20 μs pulse width is analyzed and evaluated.The amplitude error of the signal is compensated.The experiment results and analysis show that the merits of the method are low computational capability,very low memory and easy realization.

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Key concepts: Computer science, Pulse compression, Infinite impulse response, SIGNAL (programming language), Pulse-amplitude modulation, Digital filter, Bandwidth (computing), Impulse response