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

Abstract

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.

Keywords

• 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