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Abstract
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 language | English |
|---|---|
| Title of host publication | General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI |
| Subtitle of host publication | 2014 XXXIth URSI GASS |
| Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| Pages | 1-4 |
| Number of pages | 4 |
| DOIs | |
| Publication status | Published - Nov 2014 |
Keywords
- Interference Alignment
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Dive into the research topics of 'Interference alignment in distributed cooperative relay system with delayed CSIT'. Together they form a unique fingerprint.Research output
- 1 Citations
- 1 Conference Contribution (Conference Proceeding)
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On the Sum-Rate Performance and Trade-off in Relay-Aided Interference Alignment with Outdated CSIT
Tian, Y., Nix, A. & Beach, M., Sept 2015, Personal Indoor and Mobile Radio Communications (PIMRC), 2015 IEEE 26th International Symposium on. Institute of Electrical and Electronics Engineers (IEEE), p. 1039-1044 6 p.Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)