Title :
Beamforming and aligned interference neutralization achieve the degrees of freedom region of the 2×2×2 MIMO interference network
Author :
Vaze, Chinmay S. ; Varanasi, Mahesh K.
Author_Institution :
Dept. of Electr., Comput., & Energy Eng., Univ. of Colorado, Boulder, CO, USA
Abstract :
We study the layered two-hop, two-unicast multi-input, multi-output (MIMO) interference network, which consists of two transmitters, two relays, and two receivers with the first and the second hop networks between transmitters and relays, and between relays and receivers, respectively, both being Gaussian MIMO interference channels. The DoF region is established in the general case, where there are arbitrary numbers of antennas at all terminals. It is shown that the DoF region coincides with the min-cut outer-bound, and is achievable via a scheme involving beamforming and aligned interference neutralization.
Keywords :
Gaussian channels; MIMO communication; antennas; array signal processing; interference suppression; DoF region; Gaussian channel; MIMO interference network; aligned interference neutralization; antenna; beamforming; degree of freedom; multiple input multiple output; receivers; relays; transmitters; Antennas; Array signal processing; Interference; MIMO; Prototypes; Relays; Vectors; Aligned interference neutralization; beamforming; two-hop two-flow networks;
Conference_Titel :
Information Theory and Applications Workshop (ITA), 2012
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4673-1473-2
DOI :
10.1109/ITA.2012.6181801
