On Downlink Beamforming With Small Cells in Wireless Heterogeneous Systems

Author

Jinho Choi

Author_Institution

Sch. of Inf. & Commun, Gwangju Inst. of Sci. & Technol. (GIST), Gwangju, South Korea

Volume

4

Issue

4

fYear

2015

Firstpage

425

Lastpage

428

Abstract

In this letter, we study downlink beamforming for wireless heterogeneous networks with two groups of users. The users in one group (group 1) are supported by the smallcell base station (SBS) as well as the macrocell base station (MBS), while the users in the other group (group 2) are supported by the MBS only. The MBS is equipped with an antenna array for downlink beamforming. We formulate a convex optimization problem, which can be solved by semidefinite programming (SDP) relaxation, for downlink beamforming that takes advantage of the presence of the SBS for group 1, but also takes into account the interfering signal from the SBS for group 2.

Keywords

antenna arrays; array signal processing; cellular radio; convex programming; radio networks; MBS; SBS; SDP relaxation; antenna array; convex optimization problem; downlink beamforming; macrocell base station; semidefinite programming relaxation; small cell base station; wireless heterogeneous systems; Array signal processing; Base stations; Downlink; Interference; Optimized production technology; Scattering; Signal to noise ratio; Downlink beamforming; convex optimization; heterogeneous networks;

fLanguage

English

Journal_Title

Wireless Communications Letters, IEEE

Publisher

ieee

ISSN

2162-2337

Type

jour

DOI

10.1109/LWC.2015.2431687

Filename

7105333