Title :
Linear degrees of freedom of the MIMO X-channel with delayed CSIT
Author :
Kao, David T. H. ; Avestimehr, Amir Salman
Author_Institution :
Univ. of Southern California, Los Angeles, CA, USA
fDate :
June 29 2014-July 4 2014
Abstract :
We establish the sum degrees of freedom of the multiple-input multiple-output X-channel with delayed Channel State Information at the transmitters (CSIT), assuming linear coding strategies at the transmitters. The converse is based on developing a novel rank-ratio inequality that upper bounds the ratio between the dimensions of received linear subspaces at the two receivers. The achievability is based on a three-phase strategy that optimally exploits delayed CSIT in each phase.
Keywords :
MIMO communication; encoding; linear codes; radio transmitters; MIMO X-channel; channel state information; linear coding; multiple-input multiple-output X-channel; transmitters; Equations; Interference; MIMO; Nickel; Receivers; Transmitting antennas;
Conference_Titel :
Information Theory (ISIT), 2014 IEEE International Symposium on
Conference_Location :
Honolulu, HI
DOI :
10.1109/ISIT.2014.6874856
