Riccardo de Gaudenzi is Head of the Radio Frequency Systems, Payload and Technology Division at the European Space Agency Research and Technology Centre (ESTEC), Noordwijk, The Netherlands. The division is responsible for supporting the definition and development of advanced satellite system, subsystems and related technologies for telecommunications, navigation and earth observation applications. He has been responsible for a large number of R&D activities for TT&C, Telecom and Navigation applications. He spent one year with Qualcomm Inc., San Diego USA, in the Globalstar project system group. His current interest is mainly related with efficient digital modulation and multiple access techniques for fixed and mobile satellite services, synchronization topics, adaptive interference mitigation techniques and communication systems simulation techniques. He actively contributed to the development and the demonstration of the ETSI S-UMTS Family A, S-MIM, DVB-S2, DVB-S2X, DVB-RCS2 and DVB-SH standards. He has published more than 140 scientific papers and own more than 20 patents.