Back to the list of graduate studentsInterference and Traffic Simulation Studies of Digital In-Building Wireless Systems
by
Derek F.K. Yu
M. Eng., 1993
Abstract
Computer simulations have been used to study the effects of a number of factors on the traffic capacity and interference characteristics of TDMA In-Building Wireless Systems. These factors include wall attenuation, transmitter power control, and the acceptable level of Signal to Interference Ratio (SIR) to establish a call and to maintain the call. High wall attenuation, characteristics of high frequency operation (above 20 GHz), is included in the studies. Simulation results indicate that well-designed systems with portable power control and low call setup SIR threshold in buildings with high wall attenuation can reach the theoretical traffic capacity level. In general, simulation results show a high probability of a domain interferer. Hence, the main cause of a blocked or dropped call is due to a strong domain interferer. Therefore, improvements in system performance with increased capacity and improved communications quality are expected by incorporating interference cancellation techniques.