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

• Main Authors: Hyukjin Chae, Jinyoung Jang, Dongku Kim
• Format: Article
• Language: English
• Published: Wiley 2014-12-01
• Series: The Journal of Engineering
• Subjects: precoding; channel coding; radiofrequency interference; wireless channels; K-user cyclic interference channels; ergodic sum rate maximization; ergodic sum rate approximation; degrees of freedom; K-user cyclic SISO IC; receiver; transmitter; two-symbol extension; precoder design
• Online Access: http://digital-library.theiet.org/content/journals/10.1049/joe.2014.0295

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.