Performance of Multi-relay Cooperative Communication Using Decode and Forward Protocol

Nowadays, the development of wireless communication systems will be refer to user cooperative communication system in which a source information can transmit data to a destination through a relay. This can reduce the effect of fading on wireless communication channel which is a major problem in wireless communication system that can degrade the system performance. In this paper, we investigate the performance of multi-relay cooperative communication using decode and forward protocol in terms of channel capacity, bit error rate (BER) and throughput. The use of decode and forward protocol in multi-relay cooperative communication offers cooperation among users to generate virtual multiple antennas to increase the channel capacity and also can give better system performance. Furthermore, the simulation model of the system and computer simulation is developed to evaluate the performance of multi-relay cooperative communication. The simulation result shows that the channel capacity increases as the value of signal to noise ratio (SNR) increases. Also, the channel capacity increases as the number of relays increases. Moreover, the performance of multi-relay cooperative communication performs better than a single-relay cooperative communication by using decode and forward protocol in terms of BER. Furthermore, multi-relay cooperative communication provides a good throughput of the system compared to a single-relay. Therefore, the multi-relay cooperative communication is useful to mitigate the effects of channel fading, increase the channel capacity, improve the system performance and provide a good throughput by exploiting decode and forward protocol

Analysis & Design of E-Community Development System in Jakarta, Indonesia

Nowadays, community service becoming essentials in education, but these activities are done manually, as each institution had to find communities and sponsors before opening a class. To support these activities we are analyzing and designing an E-Community Development system to help communities, institutions and also lecturers in completing their responsibilities. Using this system, all registered communities, institutions and lecturers in Indonesia can communicate with each other using a web-based system. We hope the presence of this application can cut down the process of opening a community service class. The method used in analyzing and designing the system are by problem identification, literature study, goal specification, data collection, analysis and data interpretation, and evaluation & report