[01] G. R. Ahmed Jamal, Department of Electrical and Electronic Engineering, University of Asia Pacific, Dhaka, Bangladesh. [02] Toukir Ahmed, Department of Electrical and Electronic Engineering, Primeasia University, Dhaka, Bangladesh. [03] M. Elias Kanchon, Department of Electrical and Electronic Engineering, Primeasia University, Dhaka, Bangladesh. [04] S. M. Nahid Hossain, Department of Electrical and Electronic Engineering, Primeasia University, Dhaka, Bangladesh.

The problem of co-channel interference in GSM cellular mobile communication is studied. One effective method of reducing co-channel interference, namely ‘Mechanical antenna downtilt’ is investigated. Suitable values of base station antenna parameters is calculated using MATLAB to find for reducing co-channel interference through this method. The simulation result provided suitable values for antenna height and vertical beamwidth angle to maintain the downtilt angle within optimum range for standard coverage area. These values can be used to design a real site to achieve reduced co-channel interference so as to improve the performance of cellular network.

Cellular Mobile, Co-Channel Interference, Antenna, Mechanical Downtilt, Beam Width

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