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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control)
Hoga Saragih
University of 17 AGUSTUS 1945 JAKARTA
Computer Science & IT

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PERANCANGAN LAYANAN SISTEM SELULAR PADA ADAPTIVE CDMA S-ALOHA DENGAN IGA Hoga Saragih
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 6, No 3: December 2008
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v6i3.565

Abstract

Design of celluler system servicing with adaptive code-division multiple-access slotted-ALOHA (adaptive CDMA S-ALOHA) using improved Gaussian approximation (IGA) was analyzed. In this analysis, the algorithms set of change in the level of transmission speed for user based on the traffic condition occurs. The using of CDMA S-ALOHA channel access protocol is a mix of S-ALOHA and CDMA access methods in wireless communication systems. This method allows the user to access simultaneously, and the using of spectrum is efficient that it is advantages of CDMA S-ALOHA. Adaptive CDMA S-ALOHA method is a technique that can make adjustments based on the level of transmission speed of traffic conditions. As a result, the throughput of adaptive CDMA S-ALOHA based on IGA more accurate than based on Gaussian Approximation (GA).
SIMULASI PERHITUNGAN HIGH POWER AMPLIFIER PADA SISTEM VSAT Indri Neforawati; Hoga Saragih
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 7, No 2: August 2009
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v7i2.585

Abstract

Arithmatical simulation of High Power Amplifier (HPA) on VSAT system is a program which used  to calculate the capacity of HPA as a working test of maximum power on each remote station of the VSAT network system, afterward  can be obtained the available  capacity value and power capacity used, therefore  able to reallocate residual power below its available power spare. VSAT system can be used for several telecommunication application such as video broadcast, data broadcast,audio broadcast, banking operation, ATM and others. Due to the easy operational, maintanance and its instalment, VSAT system is more prifitable compare to ordinary terestrial band, its capability for  multiservice application become more  flexible in using  its network. The software used is Visual Basic 6.0 version and database Microsoft Access. These software take a role as visualization and planning for remote station development and also power capasity needed for each remote in the calculation of HPA. 
Co-Authors Indri Neforawati