This thesis submitted to the Department of Signal Processing, School of Engineering at Blekinge Institute of Technology in partial fulfillment of the requirements for the degree of Master of Science in Electrical Engineering with emphasis on Telecommunications. The thesis is equivalent to 20 weeks of full time studies.-This thesis is submitted to the Department of Signal Processing, School of Engineering at Blekinge Institute of Technology in partial fulfillment of the requirements for the degree of Master of Science in Electrical Engineering with emphasis on Telecommunications. The thesis is equivalent to 20 weeks of full time studies.