Research Areas

    Ultra Wide Band (UWB) Communications

    Ultra Wide Band Communications

    Ultra wide band (UWB) communications are an emerging technology targeted to low complexity wireless personal area network (WPAN) applications (see also Wikipedia). UWB implies use of very narrow pulses (in time) to assure very wide frequency occupancy, in such a way to assure orthogonality with respect to classical narrowband or even wideband signals. UWB has been recently standardized both in IEEE.802.15.4a (low bit rate, <10Mbit/s, time hopping communication) and ECMA 368-369 (high bit rate, 500Mbit/s, multi band OFDM communication). UWB is also well suited for efficient indoor localization by means of very accurate time of arrival measurements.

    Main research areas

    The research on UWB spans both time hopping and multi band OFDM formats.

    The main areas of interest at DGT are:

    • Digital receiver design – focusing on channel estimation, demodulation, carrier frequency and sampling frequency offsets estimation, targeted to the identification of low complexity solutions.
    • Multiple access interference (MAI) resilience – design of reception algorithms that are robust to MAI using non-AWGN noise models such as Gaussian mixtures, generalized Gaussian mixtures, Laplacian models, etc.
    • Indoor localization – using time of arrival (TOA) UWB measurements.
    • Time Hopping sequences design.
    • Implementation aspects – with particular emphasis on FPGA (field programmable gate array) implementation using Xilinx tools (ISE, System Generator, EDK, etc.) and development boards.

    Supporting projects

    2007-2009 : Efficient receivers for UWB Impulse Radio in WLAN scenarios with multiple user access, Progetto di Ateneo year 2006 – University of Padova

    2006-2008 : Enabling blocks for the CMOS integration of a Multiband OFDM UWB transceiver, PRIN Project 2005 (Progetti di Rilevante Interesse Nazionale), Italian Ministry of University and Research

    2003-2006 : PRIMO, Reconfigurable Platforms for Wideband Wireless Communications,, FIRB Project 2003 (Fondo per gli Investimenti della Ricerca di Base), Italian Ministry of University and Research

    List of Published Papers

    Authors Title Appeared in
    T. Erseghe, N. Laurenti An Analysis of GLRT Packet Detection for WiMedia UWB Applications TVTech10
    T. Erseghe, L. Vangelista Exact analytical expression of Schmidl-Cox signal detection performance in AWGN CommLett10
    D. Painaitopol, J. Fiorina, T. Erseghe A comparison of IR-UWB receivers adapted to MUI with mixture based distributions WCNC10
    T. Erseghe, F. Renna On Schmidl-Cox-like frequency estimation applied to UWB impulse radio systems ICUWB09
    F. Renna, N. Laurenti, T. Erseghe Time synchronization for OFDM systems in very dispersive channels ICUWB09
    T. Erseghe, S. Tomasin UWB WPAN receiver optimization in the presence of multiuser interference TComm09
    L. Baldini, D. Manstretta, T. Erseghe, N. Laurenti, A. Liscidini, R. Castello Reconfigurable Multi-Band OFDM UWB Receivers: Circuit and System Considerations , in “Circuits and systems for future generation of wireless networks” Springer09
    T. Erseghe A Low-Complexity Receiver for Impulse Radio based upon a Gaussian Mixture Interference Model TWCom08
    D. Manstretta, N. Laurenti, R. Castello A Reconfigurable Narrowband MB-OFDM UWB Receiver Architecture TCirc&SystII08
    T. Erseghe, V. Cellini, G. Dona’ On UWB Impulse Radio receivers derived by modeling MAI as a Gaussian mixture process TWCom08
    N. Laurenti, F. Renna Estimation of carrier and sampling frequency offset for ultra wide band OFDM systems ICUWB08
    T. Erseghe, A.M. Cipriano Performance of UWB Impulse Radio in Strong MAI with Frequency Offsets Estimation ICUWB08
    T. Erseghe, S. Tomasin Optimized demodulation for MAI resilient UWB W-PAN receivers ICC08
    T. Erseghe, N. Laurenti, V. Rizzi, R. Corvaja A packet detection algorithm for the UWB standard ECMA 368 Tyrrhenian07
    T. Erseghe Low-Complexity Impulse Radio Receiver based upon Gaussian Mixtures ICC07
    T. Erseghe, V. Cellini, G. Dona’ UWB Impulse Radio Receivers derived from a Gaussian Mixture Interference Model ICC07
    T. Erseghe, N. Laurenti Design and performance evaluation of a full-duplex operating receiver for time-hopping UWB MONET06
    V. Cellini A robust detection scheme for UWB systems in impulsive multi-user interference WiRTeP06
    T. Erseghe Capacity of UWB impulse radio with single-user reception in Gaussian noise and dense multipath TComm05
    V. Cellini, G. Dona’ A novel joint channel and multi-user interference statistics estimator for UWB-IR based on Gaussian mixture model ICUWB05
    V. Cellini, G. Dona’ A novel multi-user interference statistics estimator for UWB-IR based on Gaussian mixture model ISTSummit05
    T. Erseghe, N. Laurenti Time hopping UWB: receiver design and performance of a full-duplex system NEUWB05
    T. Erseghe Time-Hopping Sequences Selection in UWB-Impulse-Radio Packet Networks WPMC04
    N. Laurenti, P. Toniolo Performance of the Multi-band OFDM UWB System with Time-varying Channels WPMC04
    T. Erseghe, N. Laurenti, P. Nicoletti, A. Sivieri An Algorithm for Radio Resource Management in UWB Ad Hoc Networks with Concurrent Guaranteed QoS and Best Effort Traffic WPMC04
    N. Laurenti, T. Erseghe On the performance of TH-PPM and TH-PAM as transmission formats for UWB communications VTC-Spring04
    T. Erseghe, N. Bramante Pseudo Chaotic Encoding applied to Ultra Wide Band Impulse Radio VTC-Fall02
    T. Erseghe Time-Hopping Patterns derived from Permutation Sequences for Ultra-Wide-Band Impulse Radio Applications WSEAS02