# The Performance Of Convolutional Coding Based Cooperative Communication: Relay Position And Power Allocation Analysis

## TL;DR

This paper evaluates the performance of convolutional coding in cooperative relay systems, analyzing relay positions and power allocation over different fading channels, showing convolutional coding outperforms non-convolutional methods.

## Contribution

It provides a comprehensive analysis of relay position and power allocation effects on cooperative communication performance with convolutional coding.

## Key findings

- Convolutional coding outperforms non-convolutional coding in cooperative systems.
- Linear topology offers the best BER performance among tested topologies.
- Rician fading channels yield better system performance than Rayleigh channels.

## Abstract

Wireless communication faces adversities due to noise, fading, and path loss. Multiple-Input Multiple-Output (MIMO) systems are used to overcome individual fading effect by employing transmit diversity. Duo to user single-antenna, Cooperation between at least two users is able to provide spatial diversity. This paper presents the evaluation of the performances of the Amplify and Forward (AF) cooperative system for different relay positions using several network topologies over Rayleigh and Rician fading channel. Furthermore, we present the performances of AF cooperative system with various power allocation. The results show that cooperative communication with convolutional coding shows an outperformance compared to the non-convolutional, which is a promising solution for high data-rate networks such as (WSN), Ad hoc, (IoT), and even mobile networks. When topologies are compared, the simulation shows that, linear topology offers the best BER performance, in contrast when the relay acts as source and the source take the relay place, the analysis result shows that, equilateral triangle topology has the best BER performance and stability, and the system performance with inter-user Rician fading channel is better than the performance of the system with inter-user Rayleigh fading channel.

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Source: https://tomesphere.com/paper/1906.04775