This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
The authors consider K-user cyclic single-input–single-output (SISO) interference channel (IC) where each receiver is interfered with from only one neighbouring transmitter. In the K-user cyclic SISO IC, K/2 sum degrees of freedom can be achieved when two-symbol extension is applied even without channel state information at the transmitter. They derive an approximation of the ergodic sum rate as a function of pre-coders and propose designs of pre-coders to maximise the ergodic sum rate.
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V.R. Cadambe ,
S.A. Jafar
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Interference alignment and the degrees of freedom for the K-user interference channel.
IEEE Trans. Inf. Theory
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8 ,
3425 -
3441
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O. Somekh ,
B.M. Zaidel ,
S. Shamai
.
Sum rate characterization of joint multiple cell-site processing.
IEEE Trans. Inf. Theory
,
12 ,
4473 -
4497
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10)
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5. Zhou, L., Yu, W.: ‘On the capacity of the K-user cyclic Gaussian interference channel’, IEEE Trans. Inf. Theory, 2013, 59, (1), pp. 154–165, (doi: 10.1109/TIT.2012.2218215).
http://iet.metastore.ingenta.com/content/journals/10.1049/joe.2014.0295
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