Degrees of Freedom of Asymmetrical Multi-Way Relay Networks

Fan Sun; Elisabeth De Carvalho

doi:10.1109/SPAWC.2011.5990468

Degrees of Freedom of Asymmetrical Multi-Way Relay Networks

Fan Sun, Elisabeth De Carvalho

Department of Electronic Systems

Research output: Contribution to journal › Conference article in Journal › Research › peer-review

17 Citations (Scopus)

508 Downloads (Pure)

Abstract

In this paper, we introduce an asymmetrical multi-way relay channel where a base station conveys independent symbols to K different users while receiving independent symbols from the users. In this network, user i Shas Mi antennas (i ∈ [1, ..., K]), the base station has Σi=1K Mi antennas and the relay is equipped with NR antennas. To study the capacity of this network, the degree of freedom (DOF) is characterized to be 2 Σi=1K Mi if NR ≥ Σi=1K Mi. The DOF implies that the number of symbols any transmitter can deliver and receive is equivalent to its number of antennas. The DOF is achievable with a proposed joint multiple access and broadcast precoding design using the signal space alignment concept.

Original language	English
Journal	I E E E Workshop on Signal Processing Advances in Wireless Communications. Proceedings
Pages (from-to)	516-520
Number of pages	5
ISSN	1242-5125
DOIs	https://doi.org/10.1109/SPAWC.2011.5990468
Publication status	Published - Jun 2011

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10.1109/SPAWC.2011.5990468

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Cite this

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title = "Degrees of Freedom of Asymmetrical Multi-Way Relay Networks",

abstract = "In this paper, we introduce an asymmetrical multi-way relay channel where a base station conveys independent symbols to K different users while receiving independent symbols from the users. In this network, user i Shas Mi antennas (i ∈ [1, ..., K]), the base station has Σi=1K Mi antennas and the relay is equipped with NR antennas. To study the capacity of this network, the degree of freedom (DOF) is characterized to be 2 Σi=1K Mi if NR ≥ Σi=1K Mi. The DOF implies that the number of symbols any transmitter can deliver and receive is equivalent to its number of antennas. The DOF is achievable with a proposed joint multiple access and broadcast precoding design using the signal space alignment concept.",

author = "Fan Sun and {De Carvalho}, Elisabeth",

year = "2011",

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doi = "10.1109/SPAWC.2011.5990468",

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journal = "I E E E Workshop on Signal Processing Advances in Wireless Communications. Proceedings",

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publisher = "IEEE Communications Society",

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