© 1997-2012 IEEE. A first-order zero-forcing beamformer design is proposed in this letter for MU-MIMO systems under per-antenna power constraints (PAPC). By forming the regularized dual problem, first-order methods can be applied. To achieve the limit convergence rate of first-order methods, an accelerated method is introduced to solve the regularized dual problem. Simulation results are provided to show the effectiveness of the proposed method.
Li, B., Dam, H. H., Cantoni, A., & Teo, K. L. (2015). A first-order optimal zero-forcing beamformer design for multiuser MIMO systems via a regularized dual accelerated gradient method. IEEE Communications Letters, 19(2), 195-198. https://doi.org/10.1109/LCOMM.2014.2381245