Discrete Broadcast Beamforming with Antenna and User Selection

Date

2015-05-19

Author

Demir, Özlem Tuğfe
Tuncer, Temel Engin

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Antenna selection is an effective approach to reduce hardware cost as well as increasing channel diversity. In this paper, broadcast beamforming design with antenna selection is considered for cognitive radio networks. In the presence of primary users, it is usually difficult to satisfy quality of service (QoS) constraints of the all secondary users while keeping the interference towards the primary users below a certain threshold. User selection is a good method in order to make the problem feasible. In this paper, discrete phase-only beamforming is considered due to its simplicity and certain advantages. The joint problem is converted into linear form and solved optimally by using mixed integer linear programming. Simulation results show that significant power saving is possible compared to fixed antenna systems.

Subject Keywords

Antenna selection, Mixed integer linear programming, Discrete beamformer, Transmit beamformer

URI

https://hdl.handle.net/11511/53530

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar