Pulse Compression of Linear Frequency Modulation Signals in Presence of Phase Truncation

Abstract

Direct digital synthesis (DDS) is widely used in radar signal generation. In order to study the influence of phase truncation on signal processing, this paper models DDS to generate linear frequency modulated (LFM) signal, and accomplishes pulse compression based on systemvue. Based on phase truncation spurs of the single-tone sinusoidal signal, spurious components of LFM signals generated by DDS are analyzed qualitatively. Simulations graphically demonstrate that, these spurs decrease signal to noise ratio after pulse compression. To avoid effect of these spurs, proper parameters of DDS are provided for radar systems.