लेखक: Martin Feuerstein

Pablo Tapia is a Principal Engineer at T-Mobile, US. He delivers consultancy services to T-Mobile USA within the Network Evolution and Strategy Group at T-Mobile Headquarters, working closely with Nokia and Ericsson. Before moving to the US he was Lead Consultant at Optimi in Spain, where he supplied T-Mobile International (15+ operators) with a corporate solution for WCDMA Optimization, including RF planning and optimization. Previous to this he set up Nokia Networks R&D center in China. He has a multidisciplinary background, including experience in R&D in network vendors, software development and operator experience, with contribution to multiple papers, and co-designer of several patents. He is a contributor to two Wiley books. Jun Liu is also a Principal Engineer at T-Mobile, US. He has co-authored a number of papers with Pablo Tapia.