Energy-efficient MMSE beamforming and power allocation in multibeam satellite systems

Author

Chatzinotas, Symeon ; Zheng, Gan ; Ottersten, Björn

Author_Institution

SnT - securityandtrust.lu, Univ. of Luxembourg, Luxembourg City, Luxembourg

fYear

2011

fDate

6-9 Nov. 2011

Firstpage

1081

Lastpage

1085

Abstract

In current satellite communication systems, energy efficiency is of paramount importance since it strongly affects the satellite size and lifetime. In this paper, the energy efficiency of a multibeam downlink system is investigated in terms of maximizing the ratio of system throughput over consumed power. More specifically, the consumed power comprises both operating power which is needed for running the network equipment and transmit power which is needed for forwarding the information to the end users. Regarding the employed transmission technique, Minimum Mean Square Error (MMSE) beamforming together with power optimization for satellite downlink channel is used while full frequency reuse is assumed. By varying the ratio of operating and transmit power, we study the performance of the forward link in terms of spectral and energy efficiency.

Keywords

array signal processing; frequency allocation; least mean squares methods; satellite communication; MMSE beamforming; energy efficiency; frequency reuse; multibeam downlink system; multibeam satellite systems; network equipment; power allocation; power optimization; satellite communication systems; satellite downlink channel; satellite size; spectral efficiency; system throughput; transmit power; Array signal processing; Interference; Satellite broadcasting; Satellites; Signal to noise ratio; Throughput; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers (ASILOMAR), 2011 Conference Record of the Forty Fifth Asilomar Conference on

Conference_Location

Pacific Grove, CA

ISSN

1058-6393

Print_ISBN

978-1-4673-0321-7

Type

conf

DOI

10.1109/ACSSC.2011.6190179

Filename

6190179