Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Joint antenna selection and phaseonly beamforming using mixedinteger nonlinear programming
: Fischer, Tobias; Hedge, Ganapati; Mattner, Frederic; Pesavento, Marius; Pfetsch, Marc E.; Tillmann, Andreas M.
 Informationstechnische Gesellschaft ITG: WSA 2018, 22nd International ITG Workshop on Smart Antennas : March 1416, 2018 Bochum, Germany, CDROM Berlin: VDEVerlag, 2018 (ITGFachbericht 276) ISBN: 9783800745418 7 pp. 
 International Workshop on Smart Antennas (WSA) <22, 2018, Bochum> 

 English 
 Conference Paper 
 Fraunhofer ITWM () 
Abstract
In this paper, we consider the problem of joint antenna selection and analog beamformer design in downlink singlegroup multicast networks. Our objective is to reduce the hardware costs by minimizing the number of required phase shifters at the transmitter while fulfilling given distortion limits at the receivers. We formulate the problem as an 0 minimization problem and devise a novel branchandcut based algorithm to solve the resulting mixedinteger nonlinear program to optimality. We also propose a suboptimal heuristic algorithm to solve the above problem approximately with a low computational complexity. Computational results illustrate that the solutions produced by the proposed heuristic algorithm are optimal in most cases. The results also indicate that the performance of the optimal methods can be significantly improved by initializing with the result of the suboptimal method.