Distributed Joint Transmitter-Receiver Beamforming and Power Allocation in MIMO Interference Channel with Interference Alignment

Author

Mengjie Xie ; Tat Ming Lok

Author_Institution

Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Hong Kong, China

fYear

2014

fDate

14-17 Sept. 2014

Firstpage

1

Lastpage

5

Abstract

Interference alignment (IA) scheme for multiple input multiple output (MIMO) system has been widely studied. In this paper, we introduce a novel metric known as Group-SINR (GSINR), which is also the average SINR per stream of one group under perfect interference alignment. Based on the GSINR characterization, we develop a Max-GSINR algorithm to jointly optimize Transmitter-Receiver (Tx-Rx) beamformers and allocate group power subject to total power constraint. The Max-GSINR algorithm is guaranteed to converge and implementable in a distributed manner in reciprocal channels. Results show that the proposed algorithm achieves higher average SINR per stream under fixed group power allocation, and higher sum rate under uneven group power allocation.

Keywords

MIMO communication; array signal processing; optimisation; radio transceivers; radiofrequency interference; wireless channels; GSINR characterization; MIMO system; Tx-Rx beamformers; group SINR; interference alignment scheme; max-GSINR algorithm; multiple input multiple output system; power allocation; reciprocal channels; total power constraint; transmitter-receiver beamformers optimization; Interference channels; MIMO; Receivers; Resource management; Signal to noise ratio; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Fall), 2014 IEEE 80th

Conference_Location

Vancouver, BC

Type

conf

DOI

10.1109/VTCFall.2014.6965940

Filename

6965940