2011•Journal of Nanjing University of Science and TechnologyRequires access

Ambiguity Function Analysis of OFDM Radar Signals

Weimin Su

Abstract

To address the problem of waveform design,the periodic ambiguity function of orthogonal frequency division multiplexing(OFDM) radar signals is derived and its relationship with the modulating sequences is indicated.Multiple-period ambiguity function is further studied and the characteristics of the side-lobe are analyzed.A corresponding coherent pulse train processing method is proposed to reduce the Doppler side-lobe.Simulation results of Barker codes modulated OFDM radar signal are presented.This approach requires no direct computation of the modulated signals and the ambiguity is derived from the modulating sequence.

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Key concepts: Ambiguity function, Orthogonal frequency-division multiplexing, Side lobe, Ambiguity, Radar, Waveform, Main lobe, Electronic engineering