Maximising sum rate for two interfering wireless links

Author

Badruddin, Nasreen ; Evans, Jamie ; Hanly, Stephen

Author_Institution

Univ. of Melbourne, Melbourne

fYear

2008

fDate

Jan. 30 2008-Feb. 1 2008

Firstpage

75

Lastpage

81

Abstract

In this paper, we consider the problem of maximising the sum rate of two interfering links in Gaussian noise. We assume no fading and that interference is treated as worst-case Gaussian noise, and that the optimal power allocation must be time-invariant. We show that either both links must operate at maximum power, or one link operates at maximum power and the other link is switched off. The switching point between one power scheme to another depends on the value of gamma which is the SNR of the link, as well as the channel gains at all links.

Keywords

Gaussian noise; optimisation; radio links; radiofrequency interference; wireless channels; Gaussian noise; interfering wireless links; optimal power allocation; sum rate maximisation; wireless channel gain; Fading; Gaussian noise; Interference channels; Lagrangian functions; Optimization methods; Power engineering and energy; Signal to noise ratio; Time sharing computer systems; Transmitters; Wireless networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications Theory Workshop, 2008. AusCTW 2008. Australian

Conference_Location

Christchurch

Print_ISBN

978-1-4244-2038-4

Electronic_ISBN

978-1-4244-2038-4

Type

conf

DOI

10.1109/AUSCTW.2008.4460825

Filename

4460825