Aligned Interference Neutralization and the Degrees of Freedom of the 2 x 2 x 2 Interference Channel

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We show that the 2 x 2 x 2 interference network, i.e., themultihop interference network formed by concatenation of two two-user interference channels achieves the min-cut outer bound value of 2 DoF, for almost all values of channel coefficients, for both time-varying or fixed-channel coefficients. The key to this result is a new idea, called aligned interference neutralization, that provides a way to align interference terms over each hop in a manner that allows them to be canceled over the air at the last hop.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2012-07
Language
English
Article Type
Article
Keywords

SUM CAPACITY; WIRELESS NETWORKS; RELAY NETWORKS; ALIGNMENT; REGIME; BOUNDS

Citation

IEEE TRANSACTIONS ON INFORMATION THEORY, v.58, no.7, pp.4381 - 4395

ISSN
0018-9448
DOI
10.1109/TIT.2012.2191388
URI
http://hdl.handle.net/10203/103194
Appears in Collection
EE-Journal Papers(저널논문)
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