This ever-increasing popularity of mobile wireless communication services has motivated the need for increased capacity on a per-channel per-base-station basis. In the context of FDMA/TDMA systems, a fundamental limitation on the capacity is the mutual interference among co-channel users. Co-channel interference can be reduced or controlled through efficient and prudent allocation of system channel and power resources and incorporating adaptive antennas.

In this talk, we will start with a brief introduction of the current research activities in Wireless Research Group at Stanford lead by Prof. D. C. Cox. Then we will give a short tutorial on wireless channel modeling, followed by discussion of Channel Allocation, Power Control and Adaptive Antennas techniques and how each of them combats co-channel interference while working separately. We then show the capacity and system performance gain, through large-scale intensive computer simulation, achieved by the integrated use of these techniques. We quantify the benefit (in terms of Grade of Service (GOS), power saving and handoff rate reduction) and address some system design tradeoffs. From our simulation result, we conclude that significant gain can be attained by integrating resource allocation and adaptive antennas in cellular communications systems.

Shin-shiuan Cheng received B.S. degree from National Taiwan University and M.S. degree from Stanford University. He is currently a Ph.D. student in Wireless Research Group at Stanford University