Cognitive Radar Techniques for Spectrum Sharing

This presentation will highlight the DEVCOM Army Research Laboratory's research on radar and communications spectrum sharing over the past decade. We first discuss the state of radio frequency (RF) coexistence and how it benefits from dynamic spectrum sensing and categorize coexistence of radar and communications in terms of their cooperation and non-cooperation in using the spectrum as well as their roles as primary, secondary, and dual users of the frequency bands. We next discuss several optimization, machine learning, and adaptive signal processing methodologies that have been explored to achieve real-time dynamic spectrum access for coexistence. Finally, we introduce the topic of metacognition to regulate cognition and determine how to select a particular cognitive radar techniques appropriately for a given dynamic environment.