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access icon openaccess Pre-coder design over two-symbol extension for K-user cyclic interference channels

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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http://iet.metastore.ingenta.com/content/journals/10.1049/joe.2014.0295
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