Analytical Results to Improve the Capacity of A Cellular System In Frequency Selective Rayleigh Fading Channel

One of the biggest draw back of wireless environment is the limited bandwidth. However, the users sharing this limited bandwidth have been increased considerably by using SDMA technique that can enhance the capacity of communication system. There are some techniques that can increase the capacity of the cellular system, these areSpreading Technique, Error Control Coding Technique, Multipath Diversity Technique ( i.e. Rake Receiver), Smart Antenna Technique. In this paper we have used all these technique and examined how the capacity of cellular system vary with varying the different parameters such asthe value of spreading factor, the number of Rake fingers, the number of interfering cells, value of directivity of Adaptive Antenna at base station. In the results we find that the capacity of a cellular system is varying with these parameters. Index Terms -BER, Adaptive Antenna, DS-CDMA, Error Control Coding, Rake Receiver, Rayleigh Multipath channel, SDMA.