Interference alignment in distributed cooperative relay system with delayed CSIT

Yue Tian, Andrew R Nix, Mark A Beach

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

1 Citation (Scopus)
28 Downloads (Pure)


This paper characterizes the degrees of freedom regions for the multi-user by using interference alignment in a distributed relay system with totally delayed and not too delayed CSI feedback. As a part of the characterization, some new transmission schemes for the relay interference alignment based on the previous Maddah-Ali and Tse (MAT) scheme and Space-Time Interference Alignment (STIA) are proposed. The consequence of the results shows that the achievable gain of sum Degree of Freedom(DoF) can be improved significantly in Delayed Source-Destination channels and ideal Relay-Destination channels; meanwhile, the complexity of Base Station precoding process can be significantly reduced when the quantity of multi-users K is very large. An adaptive linear precoding and MAT combined scheme are also proposed in non-ideal Relay-Destination channels, which aim to simplify the previous MAT precoding process and improve the degree of freedom in different propagation scenarios when partly and totally delayed CSIT occur in Relay-Destination channels
Original languageEnglish
Title of host publicationGeneral Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Subtitle of host publication2014 XXXIth URSI GASS
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages4
Publication statusPublished - Nov 2014


  • Interference Alignment


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