Resource allocation and scheduling in multimedia CDMA wireless systems.

We introduce a novel power allocation and scheduling scheme in a DS-CDMA (Direct Sequence - Code Division Multiple Access) wireless communication system with real-time connections. Generally in a CDMA system all users share the same bandwidth which makes the system, interference limited. Because of this nature of such a system, power control is crucial. Traditionally power control is aimed to have equal received powers at the base station to overcome the near-far effect. We will relax this design objective and explore a different power allocation and scheduling scheme to achieve maximum total throughput in the system. We formulate the optimization problem which achieves the optimum power allocation and scheduling scheme, and then we reduce the optimization problem to a linear programming problem and solve it. We analytically study the intercell interference performance of our scheme. We use our results to discuss and compare our novel scheme with the traditional perfect power controlled CDMA systems, to show that the introduced scheme outperforms tradition perfect power controlled CDMA. We address and suggest solutions to some of the practical problems that arises in applying the suggested scheme and therefore introduce a roadmap of an overlay of the suggested algorithms over existing 3G standards. We investigate some of the statistical properties of the received power levels at the base station as a method of testing a connections suitability to a FiGARO like scheme.Ph.D.Applied SciencesElectrical engineeringUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/123530/2/3096041.pd