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All Journal Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter Jurnal Rekayasa elektrika
. Roslidar
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Other

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Performance of multi-relay cooperative communication using decode and forward protocol . Nasaruddin; . Mayliana; . Roslidar
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (308.597 KB)

Abstract

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.
Planning and analyzing DVB-T technology in Pulo Aceh using high altitude platform station Rizal Munadi; Anwar Siddiq; . Roslidar
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 1, No 2 (2011): Engineering
Publisher : Syiah Kuala University

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Abstract

 Abstact. The development of telecommunication technologies has shown remarkable improvement rapidly in this decade, one of which is in information computer and telecommunication technology. On the other hand, the services can be provided with the advance of information technology has not reached all levels of society. In Indonesia, geographic and demographic factors are among the obstacles that limit the dissemination of information. This generally occurs in remote areas such as Pulo Aceh region. To solve the problem, this study proposes a solution to overcome the isolation of information. The technology chosen for the dissemination of information is the Digital Video Broadcasting-Terrestrial (DVB-T) using High Altitude Platform Station (HAPS) technology to provide the services. The implementation of HAPS technology is expected to be able to be used as an alternative for minimizing the high cost of terrestrial infrastructure investment. This discussion is devoted to the planning of implementing HAPS in Pulo Aceh to serve the needs of communication to that community. Based on ITU recommendation, the results show that the analysis of link budget calculation with elevation angle, 34.060 has met the standard requirement. It can be concluded that Pulo Aceh can be served by a single HAPS both in terms of capacity and coverage area.
Pengujian Polarisasi Linier Terhadap Kualitas SNR Pada Sistem Komunikasi Nirkabel IEEE 802.11g Rizal Munadi; Arrad Iskandar; . Roslidar
Jurnal Rekayasa Elektrika Vol 9, No 3 (2011)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (247.862 KB) | DOI: 10.17529/jre.v9i3.162

Abstract

Gelombang elektromagnetik yang dipancarkan melalui medium udara dan merambat sesuai arah polarisasi. Polarisasi merupakan salah satu faktor yang menentukan kualitas sinyal yang diterima. Untuk mendapatkan sinyal yang maksimum akan dapat dicapai jika posisi antena penerima mempunyai arah polarisasi yang sama. Salah satu peralatan komunikasi nirkabel yang populer saat ini, wi-fi berbasis IEEE 802.11g yang lazim digunakan pada laptop dan Access Point akan diuji kualitas sinyal terimanya. Dalam penelitian ini, akan dievaluasi pengaruh polarisasi linier terhadap kualitas sinyal atau Signal to Noise Ratio (SNR). Untuk pengujian SNR digunakan perangkat lunak, Netstumbler. Evaluasi pengukuran propagasi dilakukan dengan menempatkan pemancar dan penerima pada ruang terbuka dan di dalam ruangan atau ruang tertutup. Pengujian di ruang terbuka dilakukan dengan posisi pemancar dan penerima terpisahkan dengan jarak, 3, 5, 7 dan 10 meter sedangkan di dalam ruang, kondisi ruang dipisahkan oleh sekat batu bata dan tanpa sekat. Pengujian polarisasi linier merupakan kombinasi dari polarisasi: vertikal-vertikal, horizontal-horizontal dan vertikal-horizontal. Hasil pengukuran diperoleh bahwa arah polarisasi mempengaruhi kuat sinyal pada penerima dengan hasil SNR yang lebih baik untuk polarisasi vertikal-vertikal dibandingkan pengujian dengan arah polarisasi lainnya.
Solving Human Resources Management Of Construction Labors Using Mobile Community Network . Amalia; . Roslidar
Jurnal Rekayasa Elektrika Vol 9, No 2 (2010)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.363 KB) | DOI: 10.17529/jre.v9i2.168

Abstract

A construction labor works on a project based on adetermined interval time. If the construction project is donethen the labor has to find another one. Based on theinterviews conducted to some construction labors in BandaAceh and Medan, they depend totally on the networking andfriendship among the labors in finding a project. sOn theother hand, the labors can survive only for seven days if he isnot working. The proposed solution is developing a jobsearch system for the construction labors using mobileapplication. This system is built using JavaME, RecordManagement Store (RMS) as the storage media, and ShortMessage Service (SMS) as the data connection. This systemapplies distributed system thus it will not cause the processbecomes slow because the limited memory of the cellularphone. This system provides the construction laborsspecification which is needed by the employer and the list ofconstruction labor specification. Job searching will beprocessed again once the labors done with a project. In thisway, the construction labors will continually contracted witha project. Using this system will solve the problem faced bythe construction labor in finding a project and finally achievetheir economis growth.
Co-Authors . Amalia . Mayliana . Nasaruddin Anwar Siddiq Arrad Iskandar Rizal Munadi