Frequency-Hopping MIMO Radar-Based Communications: An Overview

Enabled by the advancement in radio frequency technologies, convergence of radar and communication systems becomes increasingly promising is envisioned as a key feature future sixth-generation networks. Recently, frequency-hopping (FH) MIMO has been introduced to underlay dual-function radar-communication (DFRC) systems. Superior many previous radar-centric DFRC designs, symbol rate FH-MIMO radar-based (FH-MIMO DFRC) can exceed pulse repetition frequency. However, practical issues, particularly those crucial achieving effective data communications, are unexplored or unsolved. To promote awareness general understanding novel DFRC, this article devoted providing timely introduction DFRC. We comprehensively review essential aspects DFRC: channel/signal models, signaling strategies, modulation/demodulation processing, channel estimation methods, name few. also highlight major remaining issues suggest potential solutions shed light on research directions.