Diversity Waveform Sets for Delay-Doppler Imaging

Abstract— Properties of the ambiguity function and the uncertainty relation of Fourier transforms assert fundamental limitations on the ability of any single radar waveform of constrained time–bandwidth product to distinguish two or more targets closely spaced in both time-delay (range) and Dopplershift (radial velocity). These same mechanisms place fundamental limits on the ability radar imaging systems to distinguish separate scatterers in delay and Doppler. In this paper, the problem of using multiple waveform sets to make enhanced discrimination delay-Doppler measurements is considered. While small coded waveform sets for enhanced discrimination delay-only measurement are known (e.g., the Golay sequences), these waveforms do not have good Doppler discrimination properties. The problem of designing multiple waveform sets for enhanced discrimination delay-Doppler measurement is investigated, and the composite ambiguity function (CAF) is introduced as a tool to measure the delay-D...

• Type: Journal
• Year: 1998
• Where: TIT
• Authors: Jiann-Ching Guey, Mark R. Bell
• Keywords: Discrimination Delay-doppler Measurement, TIT 1998, Waveform, Waveform Sets