Comparison and Analysis of Trisector Cell using Antenna Beam- width for CDMA Cellular Mobile Communication Systems

Abstract

The cell sectorization techniques are widely used in cellular systems to reduce co-channel interference by means of directional antennas. Cell sectorization and improvement of the chip energy/others interference ratio (E c /I o ) are technologies to offer good quality of services (QoSs) and coverage for new and sophisticated power control to achieve high capacity. In this study, we analyze and compare performances of two trisector cell architectures with different antenna beam-widths-a wide-beam trisector cell (WBTC) and a narrow-beam trisector cell (NBTC)-in order to achieve effective cell sectoring in CDMA and cellular mobile communication systems. These architectures are outcomes of cell sectorization, which is widely employed in cellular systems for reducing co-channel interference. We verify the effectiveness and validity of the NBTC architecture by theoretically comparing it with the WBTC architecture (using parameters such as softer handoff and interference ratio). Further, we analyze results of a simulation of the WBTC and NBTC and of a field measurement performed in Namwon city in Korea. From the analysis, we find that the NBTC architecture is more efficient than the WBTC architecture in minimizing interference from adjacent BSs and increasing cell coverage while maintaining a good QoS.