MULTICAST BEAMFORMING WITH ANTENNA SELECTION USING EXACT PENALTY APPROACH

Date

2015-04-24

Author

Demir, Özlem Tuğfe
Tuncer, Temel Engin

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In this paper, multi-group multicast beamforming is considered with antenna selection. Nonconvex joint problem is converted to an equivalent biconvex problem by using exact penalty approach. The equivalent problem is solved iteratively using alternating maximization where a convex problem is solved at each step. Antenna selection reduces the total transmitted power significantly compared to the scenario with fixed antennas. Proposed method is computationally efficient and presents significant improvements in total transmitted power.

Subject Keywords

Antenna selection, Multicast beamforming, Convex optimization, Alternating maximization

URI

https://hdl.handle.net/11511/53493

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

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Multicast Beamforming with Antenna Selection Using Alternating Maximization Demir, Özlem Tuğfe; Tuncer, Temel Engin (2015-05-19) Multi-group multicast beamforming problem with antenna selection is considered in this paper. The rank one constraint which makes the problem nonconvex is embedded into the objective function using exact penalty function. The resulting problem has a bilinear objective function with convex constraints. The equivalent problem is solved iteratively using alternating maximization where a convex optimization problem is solved at each step. Using antenna selection with this effective approach further reduces the ...
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Antenna Selection and Hybrid Beamforming for Simultaneous Wireless Information and Power Transfer in Multi-Group Multicasting Systems DEMİR, ÖZLEM TUĞFE; Tuncer, Temel Engin (2016-10-01) In this paper, low-cost alternatives to full digital beamforming, namely, antenna selection and hybrid beamforming, are proposed for simultaneous wireless information and power transfer in a multi-group multicasting scenario. The joint problem can be outlined as the design of beamformer weight vectors and power splitting ratios in order to satisfy both signal-to-interference-plus-noise - ratio and harvested power constraints at each user with minimum transmission power. We first develop an efficient algorit...
DISTRIBUTED BEAMFORMING IN RELAY NETWORKS FOR ENERGY HARVESTING MULTI-GROUP MULTICAST SYSTEMS Demir, Özlem Tuğfe; Tuncer, Temel Engin (2016-03-25) In this paper, simultaneous wireless information and power transfer (SWIPT) is considered for multi-group multicasting relay networks where there is no direct link between the source and destination nodes. Each source transmits its own multicast stream to a group of users with the help of single antenna relays which use amplify-and-forward relay protocol. Each user has energy harvesting capability. A part of the received signal is used for information decoding while the rest is used for energy harvesting. T...

Citation Formats

Ö. T. Demir and T. E. Tuncer, “MULTICAST BEAMFORMING WITH ANTENNA SELECTION USING EXACT PENALTY APPROACH,” 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53493.