Paper Info
Title
Degrees of Freedom Region of the MIMO Interference Channel With Output Feedback and Delayed CSIT
Abstract
The two-user multiple-input multiple-output (MIMO) interference channel (IC) with arbitrary numbers of antennas at each terminal is considered and the degrees of freedom $({\rm DoF})$ region is characterized in the presence of noiseless channel output feedback from each receiver to its respective transmitter and availability of delayed channel state information at the transmitters (CSIT). It is shown that having output feedback and delayed CSIT can strictly enlarge the ${\rm DoF}$ region of the MIMO IC when compared to the case in which only delayed CSIT is present. The proposed coding schemes that achieve the corresponding ${\rm DoF}$ region with feedback and delayed CSIT utilize both resources, i.e., feedback and delayed CSIT in a nontrivial manner. It is also shown that the ${\rm DoF}$ region with local feedback and delayed CSIT is equal to the ${\rm DoF}$ region with global feedback and delayed CSIT, i.e., local feedback and delayed CSIT is equivalent to global feedback and delayed CSIT from the perspective of the DoF region. The converse is proved for a stronger setting in which the channels to the two receivers need not be statistically equivalent.
Year
DOI
Venue
2013
10.1109/TIT.2012.2226700
IEEE Transactions on Information Theory
Keywords
Field
DocType
MIMO communication,antenna arrays,encoding,feedback,radiofrequency interference,DoF region,MIMO interference channel,arbitrary numbers,coding schemes,degrees of freedom region,delayed CSIT,delayed channel state information at the transmitters,global feedback,local feedback,noiseless channel output feedback,two-user multiple-input multiple-output IC,Delayed channel state information at the transmitters (CSIT),interference channel (IC),multiple-input multiple-output (MIMO),output feedback
Transmitter,Converse,Computer science,Control theory,MIMO,Communication channel,Coding (social sciences),Interference (wave propagation),Encoding (memory),Channel state information
Journal
Volume
Issue
ISSN
59
3
0018-9448
Citations 
PageRank 
References 
26
0.97
22
Authors
4
Name
Order
Citations
PageRank
Ravi Tandon149857.91
Soheil Mohajer238235.75
H. V. Poor3254111951.66
Shlomo Shamai44531410.89