Skip to content

Sandra Lagén Morancho

Position: Former Member
Email:   sandra.lagenupc.edu
Office:    D5-214
Telephone:+ 34 93 401 09 64

Biography

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. In 2012 she was awarded by Red.es the best final project in Telecommunications Engineering in the area of Information Systems. In 2013 she was awarded by COIT the best national Master Thesis on Analysis and Optimization of Wireless Networks, sponsored by Ingenia Telecom. 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 she is a research assistant in the SPCOM research group at UPC, where she has participated in the EC funded projects FREEDOM and TROPIC and in a Huawei-UPC collaborative project on flexible duplexing for 5G systems. In 2013 she was recipient of a Spanish Ministry of Education grant (FPU) to complete the Ph. D. thesis at UPC. The thesis focuses on the development of coordinated and cooperative techniques for distributed interference management in MIMO dense heterogeneous cellular networks. In 2015 she did a research appointment at Nokia Networks and Aalborg University in Aalborg, Denmark, within the framework of the PhD research topic. Her main research interests include optimization theory, interference management, MIMO, and dense networks. She has one patent application filed and has participated in several contributions to the 3GPP-LTE release 11 and 12.

Journal publications

[1] S. Lagén, A. Pascual Iserte, O. Muñoz Medina and J. Vidal, "Energy Efficiency in Latency-Constrained Application Offloading from Mobile Clients to Multiple Virtual Machines", IEEE Transactions on Signal Processing, Vol. 66, No. 4, February 2018.

[2] S. Lagén, A. Agustin de Dios, J. Vidal and J. Garcia, "Performance Analysis of Feedback-Free Collision Resolution NDMA Protocol", EURASIP Journal on Wireless Communications and Networking, Vol. 2018, No. 45, February 2018.

[3] S. Lagén, A. Agustin de Dios and J. Vidal, "Efficient Use of the Spectrum in Small Cell Deployments for 5G Wireless Communications Networks", Frontiers in Science and Engineering, Vol. 7, No. 1, February 2018.

[4] A. Agustin de Dios, S. Lagén, J. Vidal, O. Muñoz Medina, A. Pascual Iserte, Guo Zhiheng and Wen Ronghui, "Efficient use of paired spectrum bands through TDD small cell deployments", IEEE Communications Magazine, September 2017, pp. 1 - 9.

[5] S. Lagén, A. Agustin de Dios and J. Vidal, "Joint User Scheduling, Precoder Design and Transmit Direction Selection in MIMO TDD Small Cell Networks", IEEE Transactions on Wireless Communications, Vol. 16, No. 4, April 2017, pp. 2434 - 2449.

[6] S. Lagén, A. Agustin de Dios and J. Vidal, "On the Superiority of Improper Gaussian Signaling in Wireless Interference MIMO Scenarios", IEEE Transactions on Communications, Vol. 64, No. 8, August 2016, pp. 3350 - 3368.

[7] S. Lagén, A. Agustin de Dios and J. Vidal, "Coexisting Linear and Widely Linear Transceivers in the MIMO Interference Channel", IEEE Transactions on Signal Processing, Vol. 64, No. 3, February 2016, pp. 652 - 664.

[8] S. Lagén, A. Agustin de Dios and J. Vidal, "Decentralized Coordinated Precoding for Dense TDD Small Cell Networks", IEEE Transactions on Wireless Communications, Vol. 14, No. 8, August 2015, pp. 4546 - 4561.

[9] S. Lagén, A. Agustin de Dios and J. Vidal, "Network-MIMO for downlink in-band relay transmissions", EURASIP Journal on Wireless Communications and Networking, January 2013.

Conference publications

[1] A. Agustin de Dios, J. Vidal and S. Lagén, "Signal-Timing Offset Compensation in Dense TDD OFDM-based Networks", IEEE Global Communications Conference, Singapore, December 2017.

[2] S. Lagén, O. Muñoz Medina, A. Pascual Iserte, J. Vidal and A. Agustin de Dios, "Long-term Provisioning of Radio Resources Based on their Utilization in Dense OFDMA Networks", IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Valencia, Spain September 2016.

[3] S. Lagén, A. Agustin de Dios and J. Vidal, "Joint User Scheduling and Transmit Direction Selection in 5G TDD Dense Small Cell Networks", IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Valencia, Spain September 2016.

[4] S. Lagén, A. Agustin de Dios, J. Vidal, B. Soret and K. I. Pedersen, "Distributed User-Centric Clustering and Precoding Design for CoMP Joint Transmission", IEEE Global Communications Conference, San Diego, USA December 2015.

[5] A. Agustin de Dios, S. Lagén and J. Vidal, "Energy Efficient Cell Load-aware Coverage Optimization for Small-Cell Networks", IEEE International Conference on Communications, London, United Kingdom June 2015.

[6] A. Agustin de Dios, S. Lagén and J. Vidal, "Channel Training Procedures for MIMO Interfering Point-to-Multipoint Channel", IEEE Global Communications Conference, Austin, USA December 2014.

[7] S. Lagén, A. Agustin de Dios and J. Vidal, "Decentralized Widely Linear Precoding Design for the MIMO Interference Channel", IEEE Global Communications Conference, Austin, USA December 2014.

[8] S. Lagén, A. Agustin de Dios and J. Vidal, "Improper Gaussian signaling for the Z-Interference Channel", IEEE International Conference on Acoustics, Speech and Signal Processing, Florence, Italy May 2014.

[9] S. Lagén, A. Agustin de Dios and J. Vidal, "Decentralized Beamforming with Coordinated Sounding for Inter-Cell Interference Management", European Wireless, Barcelona, Spain May 2014.

[10] S. Lagén, A. Agustin de Dios and J. Vidal, "Distributed Inter-Cluster Interference Management for CoMP-based Cellular Networks", IEEE Global Communications Conference, Atlanta, USA December 2013.

[11] A. Agustin de Dios, J. Vidal, S. Lagén and E. Valera, "Network MIMO for Downlink in-band relay transmissions with relaying phases of fixed duration", European Signal Processing Conference, Barcelona, Spain August 2011.

[12] J. Vidal, A. Agustin de Dios, S. Lagén, E. Valera, O. Muñoz Medina, A. Garcia Armada and M. Sánchez Fernández, "Network-MIMO Backhauling for QoS-constrained Relay Transmissions", IEEE International Conference on Acoustics, Speech and Signal Processing, Prague, Czech Republic May 2011.

Latest Patents

[1] S. Lagén, A. Agustin de Dios and J. Vidal, "Method and systems for decentralized interference management in a multi-antenna wireless communication system" August 2014.

Thesis

[1] S. Lagén, "Coordination Strategies for Interference Management in MIMO Dense Cellular Networks", Dpt. of Signal Theory and Communications, UPC, December 2016. Advisor: J. Vidal and A. Agustin de Dios.