Joint Transceiver Design for Dual-Functional Full-Duplex Relay Aided Radar-Communication Systems

Driven by the demand for massive and accurate sensing data to achieve wireless network intelligence under a limited available spectrum, coexistence between radar communication systems has attracted public attention. In this paper, we investigate novel dual-functional full-duplex relay aided radar-communication system where phased-array is employed at amplify-and-forward (AF) relay. A joint transceiver design proposed maximize minimum signal-to-interference-plus-noise ratio (SINR) among all detection directions receiver quality-of-service total energy constraints. The formulated optimization problem particularly challenging due highly nonconvex objective function Based on structure, equivalently decompose it into radar-energy relay-energy minimization problems SINR requirements. To solve problem, propose low-complexity algorithm based alternating direction method of multipliers optimize transmit power receiver. can be simplified an equivalent quadratic programming introducing insightful unitary matrix. Then, closed-form expression AF beamforming matrix derived, which jointly determined channel condition radar. After that, introduce overall original discuss its optimality computational complexity. Simulation results verify that significantly outperforms other benchmark algorithms.