Time Interference Alignment via Delay Offset for Long Delay Networks

The potential of Time Interference Alignment is investigated in this work, with particular reference to the attainable degrees of freedom. The K-user interference channel is considered, in which transmitters and receivers are placed randomly in a Euclidean space. A model for long delay networks is i...

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Bibliographic Details
Published in:IEEE transactions on communications 2014-02, Vol.62 (2), p.590-599
Main Authors: Blasco, Francisco Lazaro, Rossetto, Francesco, Bauch, Gerhard
Format: Article
Language:English
Subjects:
Algorithms
Alignment
Applied sciences
Bandwidth
Channels
Degrees of freedom
Delay
Delays
Euclidean space
Exact sciences and technology
Finite element analysis
Interference
interference alignment
Interference channels
Mathematical analysis
Networks
Propagation delay
Radiocommunications
Receivers
satellite networks
Satellite telecommunications. Space telecommunications
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Transmitters
Transmitters. Receivers
Wireless networks
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Summary:The potential of Time Interference Alignment is investigated in this work, with particular reference to the attainable degrees of freedom. The K-user interference channel is considered, in which transmitters and receivers are placed randomly in a Euclidean space. A model for long delay networks is introduced and the degrees of freedom for different cases (with and without transmitter delay coordination) are evaluated. It is shown how time interference alignment can provide more degrees of freedom than TDMA when the transmitters jointly coordinate their transmission delay and the number of pairs is K ≥ 5. Closed form expressions are derived for several cases of interest which provide insight and useful predictions. This work is concluded with an investigation of the achievable degrees of freedom for multi-satellite networks, where it is shown that the results obtained under several assumptions do predict accurately the degrees of freedom in a real setting.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2013.122113.130245