Open AccessPre‐coder design over two‐symbol extension for K ‐user cyclic interference channels
Author(s) -
Chae Hyukjin,
Jang Jinyoung,
Kim Dongku
Publication year - 2014
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2014.0295
Subject(s) - ergodic theory , transmitter , extension (predicate logic) , interference (communication) , channel (broadcasting) , symbol (formal) , computer science , topology (electrical circuits) , mathematics , interference alignment , function (biology) , control theory (sociology) , telecommunications , algorithm , combinatorics , mathematical analysis , mimo , control (management) , evolutionary biology , artificial intelligence , biology , programming language
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.