A New Transmit Beamforming Method for Multi-User Communication in Dual-Function Radar-Communication

Abstract

This paper develops a new transmit beamforming for an integrated mechanical and electrical scanning dual-function radar-communication (DFRC) system. Differing from the related some works using beampattern sidelobe level to communication, we exploit the fact that transmit beamforming weight vector \begin{document}$ {\boldsymbol{u}}_{k}$\end{document} in direction \begin{document}$ \theta$\end{document} and weight vector \begin{document}$ {\boldsymbol{u}}_{k}^{*}$\end{document} in direction \begin{document}$ -\theta$\end{document} can achieve the same spatial power distribution, and formulate a new transmit beamforming vector design problem accounting for some extra sidelobe level constraints. By doing so, the number of the transmit beamforming weight vectors and the computing demand in the multi-user communication (MUC) scenario can be reduced. Finally, the numerical examples are designed to verify the effectiveness of the proposed design strategy in comparison with the existing method.