Profile

David López-Pérez, Research Fellow

Personal site www.lopez.org

He received his Bachelor and Master degrees in Telecommunication from Miguel Hernandez University, Elche, Spain in 2003 and 2006, respectively.

  He joined VODAFONE SPAIN in 2005, working at the Radio Frequency Department in the area of network planning and optimization. He participated in the development of the VODAFONE Automatic Frequency Planning tool for GSM and DCS networks.

  In 2006, he took up a research PhD scholarship at the Centre for Adaptive Wireless Systems (AWS) at Cork Institute of Technology (CIT) in Ireland. He worked for a year on a project called “UbiOne – The Multi-Modal WiFi Positioning System”. The main goal of the project was to prove that the major disadvantages of the poor accuracy of existing indoor location systems can be overcome by fusing two complementary location techniques, radio signal strength indication (RSSI) and radio signal time of flight (TOF) with a unique self-calibrating approach.

In 2007, he was awarded with a Marie-Curie Fellowship for PhD studies at the Centre for Wireless Network Design (CWiND) at the University of Bedforshire (UoB) in UK. My research was supported by the “FP6 Marie Curie RANPLAN-HEC project” (MESTCT-2005-020958). At CWiND, he also participated in several research projects such as the first EPSRC-funded research project on femtocells - “The feasibility study of WiMAX based femtocells for indoor coverage” (EP/F067364/1).

In 2009, his paper "OFDMA femtocells: a roadmap on interference avoidance", (IEEE Communications Magizine, vol. 47, no. 9, pp. 41 - 48, Sept. 2009) was ranked in 47 of the top 100 documents accessed in IEEExplore in Oct. 2009. Moreover, in 2010, he  co-authored his first book "Femtocells: Technologies and Deployment", which provides  an in-depth guide on 3G/4G femtocells.

Currently, he is research associate at the King's College of London, working on a project that aims to develop solutions for inter-cell interference avoidance through OFDMA downlink resource allocation in networks that has femtocells overlaid on macrocells.

Research Interest

• WCDMA, OFDMA and 4G networks
• Network planning and optimization
• Femtocell and two-tier networks
• Cooperative communications
• Optimization techniques
• Simulation

Awards and Achievements

• His paper "OFDMA femtocells: a roadmap on interference avoidance", (IEEE Communications Magazine, vol. 47, no. 9, pp. 41 - 48, Sept. 2009) was ranked in 47 of the top 100 documents accessed in IEEExplore in Oct. 2009.
• Marie Curie Pre-Doctoral Fellowship (2007 - 2010)
• Awarded in 2006 with the “Five Star Student” diploma, as M.Eng. graduate. Awarded by UMH (www.umh.es/observatorio/cas/5estrellas.htm)
• Awarded in 2004 with the “Five Star Student” diploma, as B.Eng. graduate. Awarded by UMH (www.umh.es/observatorio/cas/5estrellas.htm)

Membership

• The Institute of Electrical and Electronics Engineering (IEEE).
• IEEE Communications Society.
• COST Action 2100 – Pervasive Mobile & Ambient Wireless Communications.

Projects

• T-Mobile and CWiND (Centre for Network Wireless Design): "The investigation of the impact of femtocell deployment to macrocell layer". (2010)
• COST2100 - Short Time Scientific Mission at INSA (Institut National des Sciences Appliquees) CITI (Centre of Innovation in Telecommunications and Integration of services),  Lyon France, October-November (2 months) 2009.
• EU FP6 Marie Curie (MESTCT-2005-020958): ”Radio Access Network PLANning & optimisation, and High End Computing (RANPLAN-HEC)”. (2007-2010). [link]
  
• EPSRC (EP/F067364/1): “Feasibility study for WiMAX based home Femtocell for indoor coverage”. (2007).

Committee membership

• ACCESS 2010's committee for the FEMTO special area (International Conferences on Access Networks, Services and Technologies, September 20-25, 2010 - Valencia, Spain) Under the InfoWare 2010 umbrella.
• Chair of Femtocell Networks Track in IEEE WCNC (Wireless Communications and Networking Conference), Sydney, Australia, April 2010.

Books

• J. Zhang and G. de la Roche, “Femtocells – Technologies and Deployment”, Wiley, January 2010. Contributing authors: A. Valcarce, D. López-Pérez, E. Liu and H. Song) [link][table of content]

Book Chapters

• D. López-Pérez and J. Zhang (2010). Self-Organization. In J. Zhang and G. de la Roche, Femtocells – Technologies and Deployment (1st ed., pp. 225-259 ), Wiley, January 2010. 
• D. López-Pérez, G. de la Roche and H. Song (2010). System-Level Simulation
  for Femtocell Scenarios. In J. Zhang and G. de la Roche, Femtocells – Technologies and Deployment (1st ed., pp. 105-143 ), Wiley, January 2010.
• A. Valcarce and D. López-Pérez (2010). Interference in the presence of femtocells. In J. Zhang and G. de la Roche, Femtocells – Technologies and Deployment (1st ed., pp. 145-178 ), Wiley, January 2010.

Selected journal articles

• D. López-Pérez, A. Ladanyi, A. Jüttner and J. Zhang, "Dynamic frequency Planning in LTE networks: Model and Optimization Methods," submitted to IEEE Transactions on Mobile Computing.
• D. López-Pérez, A. Valcarce, A. Ladanyi, G. De La Roche and J. Zhang, "Intracell Handover for Interference and Handover Mitigation in OFDMA Two-Tier Macrocell-Femtocell Networks," to be published in EURASIP Journal of Wireless Communications and Networking. Volume 2010, 16 pages. [preprintpdf][html]
• G. De La Roche, A. Valcarce, D. López-Pérez and J. Zhang, "Access Control Mechanisms for Femtocells," in IEEE Communications Magazine, vol. 48, no 1, Page(s):33 - 39, January, 2010. [preprintpdf]
• D. López-Pérez, A. Valcarce, G. De La Roche and J. Zhang, "OFDMA femtocells: A roadmap on interference avoidance," in IEEE Communications Magazine, vol. 47, no 9, Page(s):41 - 48, September, 2009. [preprintpdf]
• A. Valcarce, G. De La Roche, A. Juttner, D. López-Pérez and J. Zhang, "Applying FDTD to the coverage prediction of WiMAX femtocells," in EURASIP Journal of Wireless Communications and Networking. Volume 2009, Article ID 308606, 13 pages. [html]

Selected conference papers

• G. De La Roche, A. Ladanyi, D. López-Pérez,  C.-C. Chong and J. Zhang, "Self-organization for LTE femtocells," in IEEE Globecom 2010 Workshop on Femtocell Networks, Miami, USA, December 2010.
• D. López-Pérez, A. Ladanyi, A. Jüttner and J. Zhang, "OFDMA femtocells: Intracell Handover for Interference and Handover Mitigation in Two-Tier Networks," in IEEE WCNC (Wireless Communications and Networking Conference), Sydney, Australia, April 2010. [pdf]

• D. López-Pérez, A. Ladanyi, A. Jüttner and J. Zhang, "OFDMA femtocells: A self-organizing approach for frequency assignment," in IEEE PIMRC (Personal, Indoor and Mobile Radio Communications), Tokyo, Japan, September 2009. [pdf]
• A. Valcarce, D. López Pérez, G. De La Roche and J. Zhang, "Limited Access to OFDMA femtocells," in IEEE PIMRC (Personal, Indoor and Mobile Radio Communications), Tokyo, Japan, September 2009. [pdf]
• L. Galati, D. López Pérez, l.Reggiani, L. Dossi, A. Juttner and J. Zhang "Two-Dimensional Radio Resource Allocation Algorithms with Contiguity Constraint for IEEE 802.16e Systems," in IEEE PIMRC (Personal, Indoor and Mobile Radio Communications), Tokyo, Japan, September 2009. [pdf]
• D. López-Pérez, A. Ladanyi, A. Jüttner, and J. Zhang, “Self-organisation of the Sub-channel Assignment in OFDMA Femtocells: Advantages and Drawbacks of Different Channel Monitoring Techniques,” in Femtocell World Summit, London, UK, June 2009. [pdf]
• D. López-Pérez, A. Jüttner, and J. Zhang, “Dynamic System-Level Simulation of Dynamic Frequency Planing for Real Time Services in WiMAX Networks,” in IEEE IWCMC 2009 (International Wireless Communications and Mobile Computing Conference 2009), Leipzig, Germany, June 2009. [pdf]
• F. Gordejuela-Sánchez, D. López-Pérez, and J. Zhang, “A Two-Step Method for the Optimization of Antenna Azimuth/Tilt and Frequency Planning in OFDMA Multihop Networks,” in IEEE IWCMC 2009 (International Wireless Communications and Mobile Computing Conference 2009), Leipzig, Germany, June 2009. [pdf]
• D. López-Pérez, A. Jüttner, and J. Zhang, “Dynamic Frequency Planning Versus Frequency Re-use Schemes in OFDMA Networks,” in IEEE VTC (Vehicular Technology Conference), Barcelona, April, 2009. [pdf]
• A. Valcarce, D. López-Pérez, G. De La Roche, and J. Zhang, “Predicting small-scale fading distributions with Finite-Difference methods in Indoor-to-Outdoor scenarios,” in IEEE VTC (Vehicular Technology Conference), Barcelona, April, 2009. [pdf]
• F. Gordejuela-Sánchez, D. López-Pérez, and J. Zhang, “Frequency planning in IEEE 802.16j networks an optimisation framework and performance analysis,” in IEEE WCNC (Wireless Communications and Networking Conference), April 2009. [pdf]
• D. López-Pérez, G. De La Roche, A. Valcarce, A. Jüttner, J. Zhang, “Interference Avoidance and Dynamic Frequency Planning for WiMAX Femtocells Networks,” IEEE ICCS (International Conference on Communication Systems), Page(s):1579 - 1584, Guangzhou, China, November 2008. [pdf]
• D. López Pérez, A. Valcarce, G. De La Roche, J. Zhang, “Access Methods to WiMAX Femtocells: A downlink system-level case study,” in IEEE ICCS (International Conference on Communication Systems), Page(s):1657 - 1662, Guangzhou, China, November 2008. [pdf]
• F. Gordejuela-Sánchez, D. López-Pérez, L. Zhao, and J. Zhang, “Efficient Mobile WiMAX Capacity Estimations in a Multi-hop Environments,” in IEEE ICCS (International Conference on Communication Systems), Page(s):1640 - 1646, Guangzhou, China, November 2008.
• D. López-Pérez, A. Jüttner, and J. Zhang, “Optimisation Methods for Dynamic Frequency Planning in OFDMA Networks,” in IEEE Networks 2008, Budapest, Hungary, October 2008. [pdf]

• S. Beauregard, M. Klepal, Widyawan, D. López-Pérez “Progress in WearIT@Work Positioning,” in IFAWC (International Forum on Applied Wearable Computing), Tel Aviv, Israel, 2007. [pdf]

• D. López-Pérez, F. Gordejuela-Sánchez, P. Corral-González, V. Almenar-Terré, “Viterbi decoding and diversity techniques for Hiperlan/2 networks: A comparison between hard, soft quantified and soft no quantified decision,” in IADAT-e2004 (International Conference on Education), Bilbao, Spain, 2004.
• D. López-Pérez, F. Gordejuela-Sánchez, P. Corral-González, “Analysis of different techniques of diversity applied to Hiperlan/2 networks,” in URSI (XIX National Symposium of the International Union of Radio Science), Barcelona, Spain, 2004.
• F. Gordejuela-Sánchez, D. López-Pérez, , P. Corral-González, “Analysis of different types of Viterbi decoding applied to Hiperlan/2 networks,” in URSI (XIX National Symposium of the International Union of Radio Science), Barcelona, Spain, 2004.
• D. López-Pérez, P. Corral-González, “Simulation and implementation of a IEEE 802.11g radio network in the different surroundings within the campus of the UMH in Elche,” in URSI (XIX National Symposium of the International Union of Radio Science), Barcelona, Spain, 2004.

Reviewer

• IEEE Journal on Selected Areas in Communications (JSAC)
• IEEE Transactions on Mobile Computing
• IEEE Transactions on Wireless Communications
• IEEE Transactions on Vehicular Technology
• IEEE Communication Letters
• EURASIP (Hindawi)
• Telecommunication Systems Journal (Springer)
• Computer Communications (Elsavier)
• Journal of Computing and Information Technology
• IEEE Globecom
• IEEE WCNC
• IEEE PIMRC
• IEEE VTC
• ACM IWCMC

Contact

David López-Pérez
E: david.lopez@beds.ac.uk