Title :
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
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;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2014 IEEE 80th
Conference_Location :
Vancouver, BC
DOI :
10.1109/VTCFall.2014.6965940
