Error Rate and Capacity Analysis for Incremental Hybrid DAF Relaying using Polar Codes

Abstract

The deployment of an incremental hybrid decode‐amplify and forward relaying scheme is a promising and superior solution for cellular networks to meet ever‐growing network traffic demands. However, the selection of a suitable relaying protocol based on the signal‐to‐noise ratio threshold is important in realizing an improved quality of service. In this paper, an incremental hybrid relaying protocol is proposed using polar codes. The proposed protocol achieves a better performance than existing turbo codes in terms of capacity. Simulation results show that the polar codes through an incremental hybrid decode‐amplify‐and‐forward relay can provide a 38% gain when γth(1) and γth(2) are optimal. Further, the channel capacity is improved to 17.5 b/s/Hz and 23 b/s/Hz for 2 × 2 MIMO and 4 × 4 MIMO systems, respectively. Monte Carlo simulations are carried out to achieve the optimal solution.

Keywords

• Capacity
• Cooperative relaying
• Error rate performance
• IHDAF protocol
• Polar codes