2017/01/13 by Soheil Khavari Moghaddam, Moghaddam, Soheil Khavari, S. Mohammad Razavizadeh +1
Engineering · #Advanced MIMO Systems Optimization #Antenna Design and Analysis #Antenna Design and Optimization #FOS: Computer and information sciences #Information Theory (cs.IT)
paper · pdf · doi:10.48550/arxiv.1701.03630
openalex publication_date 2017/01/13 · openalex created_date 2022/10/02 · openalex updated_date 2026/07/28
3D beamforming is a promising approach for interference coordination in\ncellular networks which brings significant improvements in comparison with\nconventional 2D beamforming techniques. This paper investigates the problem of\njoint beamforming design and tilt angle adaptation of the BS antenna array for\nmaximizing energy efficiency (EE) in downlink of multi-cell multi-user\ncoordinated cellular networks. An iterative algorithm based on fractional\nprogramming approach is introduced to solve the resulting non-convex\noptimization problem. In each iteration, users are clustered based on their\nelevation angle. Then, optimization of the tilt angle is carried out through a\nreduced complexity greedy search to find the best tilt angle for a given\nplacement of the users. Numerical results show that the proposed algorithm\nachieves higher EE compared to the 2D beamforming techniques.\n