Full-Duplex SIC Design and Power Allocation for Dual-Functional Radar-Communication Systems

To meet the requirements for simultaneous sensing and communication, full-duplex operation is essential for dual-functional radar-communication (DFRC) systems. In this letter, both the full-duplex self-interference cancellation (SIC) and the corresponding power allocation problem is studied for a pulsed DFRC system. First, a full-duplex design is provided, and the radar signal to interference-plus-noise ratio (SINR) and the communication rate are derived considering imperfect full-duplex SIC. Then, a max-min-ratio problem is formulated to maximize the radar SINR under the constraint of the communication rate. For time-invariant channels, a closed-form power allocation solution is derived for both radar and communication pulses. For time-variant channels, we provide an iterative solution by adopting quadratic transform and successive convex approximation (SCA). Simulation results are further given to verify the effectiveness of the proposed designs.

Automated summary

This letter studies the full-duplex self-interference cancellation and power allocation problem for a pulsed dual-functional radar-communication system. A full-duplex design is provided, and the radar signal to interference-plus-noise ratio and communication rate are derived considering imperfect full-duplex self-interference cancellation. A max-min-ratio problem is then formulated to maximize the radar signal to interference-plus-noise ratio under the communication rate constraint.