Relay Communication with Phase Dithering and Intentional Delay in SC-FDE Systems

This paper proposes an amplify-and-forward (AF) relay technique for wireless single carrier frequency domain equalizer (SC-FDE) systems. The relaying scenario assumes that there are many nodes densely distributed, allowing two or more relay nodes to participate in relaying. The proposed method aims to enhance time and frequency diversity gain in slow fading channels. To this end, we propose to use random phase rotation and random intentional delay at each relay over time. Performance validation is conducted through simulation. By increasing the number of relay nodes, the simulation results demonstrate a notable enhancement in the bit error rate (BER) performance.