Frequency Diverse Array Information Geometry Analysis

Different classic phased-array that generates only angle-dependent transmit beampattern, frequency diverse array (FDA) offers both angle-dependent and range-dependent transmit beampattern. This paper adopts the information geometry theory to study the fundamental information resolution for a general FDA radar system. The information resolution, associated with the waveform, measurement and noise model and characterized by the Fisher information metric, provides a statistical measure for the FDA radar system. Numerical results show that FDA radar indeed outperforms conventional phased-array radar in information geometry resolution capability.