A Novel Transmit Beamformers Design Based on Alternating Optimization for RadCom System

With the dramatic evolution of information transportation, the RadCom system can simultaneously operate both radar and communication functionalities. In this brief, a novel scheme for the RadCom system is formulated to simultaneously consider the properties of both radar beampattern and communication signal-to-interference-plus noise ratio (SINR). The design degrees of freedom (DoFs) under control are the transmit beamformer vectors. The established formulation is non-convex with multiple designed variables. To overcome this difficulty, an alternating optimization (AO) procedure is proposed on the basis of the block coordinate descent method with sequential convex approximation (SCA-BCD), alternating direction method of multipliers during SCA procedure (SCA-ADMM), and Taylor transformation framework. The convergence of AO procedure is also proved analytically. Finally, simulation results manifest that the presented framework gains superior properties.