Performance evaluation studies constitute a considerable portion of the wireless communications literature. The importance of these studies stems from the fact that theyprovide system designers with feedback on the quality of their designs and hence, anopportunity for enhancements before actual deployment.This book represents a comprehensive study on the performance of mobile radio networks. It is divided into two main parts where in each part adifferent perspective is adopted: a system-level perspective is considered in the firstand a link-level one in the second. In the first part, the TDD mode of operation of WCDMA technology is thoroughly investigated under different scenarios and a complete framework forperformance evaluation is proposed. In the second part, a number of problems related to the performance of communicationsystems over the Weibull fading channel are addressed. In particular, the performance of different diversity schemes is extensively studied under different scenarios involving theexistence/non-existence of cochannel interference. Throughout this work, Monte Carlo simulations are provided to complement theanalytical results presented.