Sandra Lagén received the Telecommunication Engineering degree, the Master’s degree, and the Ph.D. degree from Universitat Politècnica de Catalunya (UPC), Barcelona, Spain, in 2011, 2013, and 2016, respectively. From 2010 to 2011, she was with Abertis Telecom, Barcelona, as an internship for projects related to infrastructures for surveillance and smart cities. From 2012 to 2017 she was a research assistant in the Signal Processing and Communications group at UPC, where she carried out her Ph.D. thesis thanks to a Spanish Ministry of Education grant (FPU). The thesis focuses on the development of coordinated and cooperative techniques for distributed interference management in MIMO dense heterogeneous cellular networks, and it was awarded by COIT the best national Ph.D. thesis on high-speed broadband mobile communications, sponsored by Orange. At that time, she participated in two projects funded by the European Commission (FREEDOM and TROPIC) and a collaborative project with Huawei on flexible duplexing for 5G systems. In 2015 she did a research appointment at Nokia Networks and Aalborg University in Aalborg, Denmark. Since May 2017 she is a Researcher in the Mobile Networks Department of the Communication Networks Division at CTTC. She has two patent applications filed and has participated in several contributions to 3GPP-LTE release 11 and 12. Her main research interests include wireless communications, MIMO, resource allocation, interference management, and optimization theory.