Transmission Design for RadCom System under The Spectrally Crowded Environment

This paper investigates the RadCom system with multiple input multiple output (MIMO) structure under mutual spectrally crowded environment, where the radar system acts as the primary function, while the communication system is the secondary function. An alternative formulation aims at maximizing signal-to-interference-plus noise ratio (SINR) with multiple constraints to control the peak-to-average power ratio (PAR), spectrally compatibility and transmit power. The design degrees of freedom are the space-time waveform for radar and communication system. Then we develop an optimal scheme that tackles the original non-convex formulation into a series of sub-problems with alternating iteration, Taylor expansion, and the double alternating direction method of multipliers (DADMM) design. Numerical examples are performed to assess the merits of the derived solutions.