Bit Error Rate Analysis of Mobile Communication Network in Nakagami Fading Channel: Interference Considerations

HERE is a steady rise in the number of mobile system users in the recent times. In order to accommodate more users in a given bandwidth, the spectral efficiency needs to be improved. So, frequency reuse technique is being adopted to increase spectral efficiency [1]. However, frequency reuse causes inter channel and co-channel interference which is more than additive white Gaussian noise of many system [2]. Due to the presence of ICI (inter channel interference) and cochannel interference, the capacity of the system is reduced. Outage probability and BER are the two performance measures which are usually adopted to evaluate the performance of mobile communication systems [3]. The outage probability and BER of a wireless system in a Rayleigh fading channel have been studied in [4], [5]. The performance measures have also been studied for more generalized Nakagami fading channel in [6], [7]. However, these performances are studied for wireless static networks. So, there is a need to study the variation of performance measures for a mobile wireless network where the nodes are mobile. Usually nodes in a static wireless network are stationary and the distance between nodes is constant. So, the received signal in a static wireless network is characterized by the short term fading model such as Rayleigh, Rician, Nakagami. It is well known that the received signal follows exponential distribution and Gamma distribution for Rayleigh fading channel and Nakagami fading channel respectively [1], [3].