18 JUL

Weekly Seminar: “OTFS: A New Generation of Modulation Addressing the Challenges of 5G”

18 July 2017 - 18 July 2017
Speaker: Christian Ibars Casas, Cohere Technologies (USA)

ABSTRACT: A new two-dimensional modulation technique called Orthogonal Time Frequency Space (OTFS) modulation designed in the delay-Doppler domain is introduced as a waveform ideally suited to new 5G use cases. Through this design, which exploits full diversity over time and frequency, OTFS coupled with equalization converts the fading, time-varying wireless channel experienced by modulated signals [...]

11 MAY

Weekly Seminar: “Two Ideas for Low Cost Mobile Edge Caching: Modeling and Optimization”

11 May 2017 - 11 May 2017

ABSTRACT: Pushing popular content to small cells (often referred to as “helper” nodes) during off-peak hours has recently been proposed to cope with the increase in mobile data traffic. User requests can be served locally from these helper nodes, reducing the backhaul/core load for the operator as well as improving user QoE. Nevertheless, size limitations [...]

Science Week 2011-1
02 MAR

Weekly Seminar: “LTE security, protocol exploits and location tracking experimentation with low-cost software radio”

ABSTRACT: The security flaws of legacy GSM networks, which lack of mutual authentication and implement an outdated encryption algorithm, are well understood among the technology community. Moreover, until now, the main cellular vulnerabilities being discovered and exploited in the mobile security research field were based on 2G base stations and GSM open source implementations. The [...]

28 FEB

Weekly Seminar: “2D and 3D Imaging using Ground Noise SAR”

28 February 2017 - 28 February 2017
Speaker: Prof. Konstantin Lukin, LNDES, O. Ya. Usikov Institute for Radiophysics & Electronics NAS of Ukraine

ABSTRACT: In the talk implementation of millimeter-wave SAR tomography technique based upon Multiple-Input-Multiple-Output (MIMO) principle with time-division of signals in Tx/Rx channels. We briefly describe MIMO operational mode for 2D aperture synthesis, which has been implemented with the help of Ka-band (36.5 GHz) Ground Based Noise Waveform SAR (GB NW SAR), and Antenna with Pattern [...]

25 JAN

Weekly Seminar: “CASTLE: A user-friendly platform to test, evaluate, and develop contemporary wireless communication standards”

25 January 2017 - 25 January 2017
Speaker: Pol Henarejos & Alexis A. Dowhuszko

ABSTRACT: CASTLE is a hybrid testbed composed of both software and hardware components that can be easily configured to obtain standard-compliant implementations of specific network elements in contemporary wireless communication systems. CASTLE focuses on PHY-layer features of different wireless standards, including LTE and LTE Advanced (mobile communications), BGAN (satellite communications), and Li-Fi (Visible Light Communications). [...]

15 DEC

Weekly Seminar: “Richi Talent”

ABSTRACT: Richi Talent is a Richi Foundation initiative in collaboration with MISTI Spain(MIT International Science & Technology Initiatives) and it is created with the aim of raising funds to combat childhood cancer, through 3 initiatives: Richi Talent, Richi Social Entrepeneurs, Richi Music: their goal is to identify, incentivize and support promising young people who, in [...]

02 NOV

Weekly Seminar: “Collision-free WLANs: from concepts to working protocols”

02 November 2016 - 02 November 2016
Speaker: Luis Sanabria-Russo

ABSTRACT: Collisions are a main cause of throughput degradation in wireless local area networks. The current contention mechanism used in the IEEE 802.11 networks is called Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA). It uses a binary exponential backoff technique to randomize each contender attempt of transmitting, effectively reducing the collision probability. Nevertheless, CSMA/CA [...]

20 OCT

Weekly Seminar: “OWL: a Reliable Online Watcher for LTE Measurements”

20 October 2016 - 20 October 2016
Speaker: Nicola Bui

ABSTRACT: Reliable network measurements are a fundamental component of networking research as they enable network analysis, system debugging, performance evaluation and optimization. In particular, decoding the LTE control channel would give access to the full base station traffic at a 1 ms granularity, thus allowing for traffic profiling and accurate measurements. Although a few open-source [...]

29 JUL

Weekly Seminar: “Clock Synchronization in Wireless Sensor Networks: from Traditional Estimation Theory to Distributed Signal Processing”

29 July 2016 - 29 July 2016
Speaker: Yik-Chung Wu, Ph.D.

ABSTRACT: In this talk, we will review the advances of clock synchronization in wireless sensor network in the past few years.  We will begin with the optimal clock synchronization algorithms in pairwise setting, in which maximum likelihood (ML) estimator from traditional estimation theory is the major tool.  Then, we will discuss the more challenging networkwide [...]