Paper Info
Title
Space time interference alignment scheme for the MIMO BC and IC with delayed CSIT and finite coherence time
Abstract
Most techniques designed for the the multi-input multiple-output (MIMO) Broadcast Channel (BC) andMIMO Interference Channel (IC) require accurate current and instantaneous channel state information at the transmitter (CSIT). This is not a realistic assumption because of feedback delay. A novel approach by Lee and Heath, space-time interference alignment (STIA), proves that in the underdetermined (overloaded) multi-input single-output (MISO) BC with Nt transmit antennas and K = Nt + 1 users Nt (sum) Degrees of Freedom (DoF) are achievable if the feedback delay is not too big, thus disproving the conjecture that any delay in the feedback necessarily causes a DoF loss. However the feedback delay needs to remain less or equal to Tc over Nt+1, where Tc is the coherence time. We consider the MIMO BC and show that the use of multi-antenna receivers allows to achieve full (sum) DoF with bigger feedback delay, up to equation. We also extend this result to the MIMO IC.
Year
DOI
Venue
2013
10.1109/ICASSP.2013.6638586
Acoustics, Speech and Signal Processing
Keywords
Field
DocType
MIMO communication,antenna arrays,broadcast channels,feedback,radiofrequency interference,transmitting antennas,DoF loss,MIMO BC,MIMO IC,MIMO broadcast channel,MIMO interference channel,MISO BC,STIA,channel state information,degrees of freedom,delayed CSIT,feedback delay,finite coherence time,multiantenna receivers,multiinput multiple-output broadcast channel,overloaded multiinput single-output BC,space time interference alignment scheme,transmit antennas,transmitter,Broadcast channel,delayed CSIT,interference alignment,interference channel
Transmitter,Multi-user MIMO,3G MIMO,Computer science,Control theory,Communication channel,MIMO,Interference (wave propagation),Channel state information,Coherence time
Conference
ISSN
Citations 
PageRank 
1520-6149
3
0.39
References 
Authors
18
3
Name
Order
Citations
PageRank
Yohan Lejosne1364.24
Dirk Slock2237.98
Yi Yuan-wu345630.09