BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/New_York BEGIN:DAYLIGHT DTSTART:20260308T030000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:EDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20261101T010000 TZOFFSETFROM:-0400 TZOFFSETTO:-0500 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:EST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260813T205334Z UID:8F6698B9-C723-4366-863C-808801C4965F DTSTART;TZID=America/New_York:20260826T120000 DTEND;TZID=America/New_York:20260826T133000 DESCRIPTION:Abstract\n\nThe design of broadband wireless communications pre sents considerable challenges. The propagation conditions can be very host ile (e.g.\, highly dispersive channels and/or deep fading or shadowing eff ects). This is especially true for systems operating in mm-wave conditions \, where one must rely in LoS and/or reflected rays. Moreover\, these syst ems are expected to have power and spectral efficiencies\, together with h igh QoS requirements. There are also implementation complexity constraints \, especially at the mobile terminals.\n\nPrefix-assisted block transmissi on techniques combined with frequency-domain detection are known to be sui table for high rate transmission over severely time-dispersive channels. T he most popular modulations based on this concept are OFDM (Orthogonal Fre quency-Division Multiplexing) and SC-FDE (Single-Carrier with Frequency-Do main Equalization). However\, the severe propagation conditions in multius er wireless systems make it likely that a non-negligible fraction of the t ransmitted packets will be lost\, either due to deep fading/shadowing effe cts or due to collisions in the MAC (Medium Access Control) phase.\n\nThe traditional approach to cope with lost packets is to drop them and ask for its retransmission. However\, even packets with a large number of bit err ors have useful information on the transmitted blocks that can be employed to improve the detection performance. To take advantage of this\, we need to employ a cross-layer approach combining PHY\, MAC and LLC layer aspect s to cope with lost packets. In this talk we show how we can design powerf ul cross-layer network diversity techniques specially designed for broadba nd wireless systems employing block transmission techniques combined with frequency domain detection.\n\nBio\n\nRui Dinis received the Ph.D. degree from IST\, Technical University of Lisbon\, Portugal\, in 2001 and the Hab ilitation in Telecommunications from FCT\, Nova University of Lisbon (UNL) in 2010 where he is a Full Professor. Rui Dinis is also researcher at IT (Instituto de Telecomunicações). During 2003 he was a visiting professor at Carleton University\, Ottawa\, Canada.\n\nRui Dinis is an IEEE ComSoc Distinguished Lecturer and an IEEE VTS Distinguished Speaker. He is or was editor at several major IEEE journals (IEEE TWC\, TCOM\, TVT and OJ-COMS) and at Elsevier Physical Communication and Hindawi ISRN Communications an d Networking. He was also a guest editor for multiple special numbers in s everal journals.\n\nHe was involved in the organization of IEEE conference s\, namely several VTC and GLOBECOM\, and is a member of several technical committees of IEEE Communications Society.\n\nRui Dinis has been actively involved in several international research projects in the broadband wire less communications area. His main research activities are on modulation a nd transmitter design\, nonlinear effects on digital communications and re ceiver design (detection\, equalization\, channel estimation and carrier s ynchronization)\, with emphasis on frequency-domain implementations\, name ly for MIMO systems and/or OFDM and SC-FDE modulations. He is also working on cross-layer design and optimization involving PHY\, MAC and LLC issues \, as well as indoor positioning techniques.\n\n[]\n\nCo-sponsored by: Sch ool of Computing\, Queen's University\n\nSpeaker(s): Rui\, \n\nAgenda: \n1 2:00 PM: Refreshments\n\n12:30 PM: DL by Prof. Rui Dinis\n\nRoom: 217\, Bl dg: Dupuis\, Queen's University\, 19 Division St \, Kingston\, Ontario\, C anada\, K7L 2N9\, Virtual: https://events.vtools.ieee.org/m/572516 LOCATION:Room: 217\, Bldg: Dupuis\, Queen's University\, 19 Division St \, Kingston\, Ontario\, Canada\, K7L 2N9\, Virtual: https://events.vtools.iee e.org/m/572516 ORGANIZER:chan-f@rmc.ca SEQUENCE:50 SUMMARY:IEEE DLT: Frequency-Domain Cross-Layer Diversity Techniques - Effic ient Ways of Coping with Lost Packets in Broadband Wireless Systems URL;VALUE=URI:https://events.vtools.ieee.org/m/572516 X-ALT-DESC:Description: <br /><p class="MsoNormal" style="text-align: justi fy\;"><strong><span lang="EN-US" style="font-size: 11.0pt\; mso-bidi-font- size: 12.0pt\;">Abstract</span></strong></p>\n<p class="MsoNormal" style=" text-align: justify\;"><span lang="EN-US" style="font-size: 11.0pt\; mso-b idi-font-size: 12.0pt\;">The design of broadband wireless communications p resents considerable challenges. The propagation conditions can be very ho stile (e.g.\, highly dispersive channels and/or deep fading or shadowing e ffects). This is especially true for systems operating in mm-wave conditio ns\, where one must rely in LoS and/or reflected rays. Moreover\, these sy stems are expected to have power and spectral efficiencies\, together with high QoS requirements. There are also implementation complexity constrain ts\, especially at the mobile terminals.</span></p>\n<p class="MsoNormal" style="text-align: justify\;"><span lang="EN-US" style="font-size: 11.0pt\ ; mso-bidi-font-size: 12.0pt\;">Prefix-assisted block transmission techniq ues combined with frequency-domain detection are known to be suitable for high rate transmission over severely time-dispersive channels. The most po pular modulations based on this concept are OFDM (Orthogonal Frequency-Div ision Multiplexing) and SC-FDE (Single-Carrier with Frequency-Domain Equal ization). However\, the severe propagation conditions in multiuser wireles s systems make it likely that a non-negligible fraction of the transmitted packets will be lost\, either due to deep fading/shadowing effects or due to collisions in the MAC (Medium Access Control) phase. </span></p>\n<p c lass="MsoNormal" style="text-align: justify\;"><span lang="EN-US" style="f ont-size: 11.0pt\; mso-bidi-font-size: 12.0pt\;">The traditional approach to cope with lost packets is to drop them and ask for its retransmission. However\, even packets with a large number of bit errors have useful infor mation on the transmitted blocks that can be employed to improve the detec tion performance. To take advantage of this\, we need to employ a cross-la yer approach combining PHY\, MAC and LLC layer aspects to cope with lost p ackets. In this talk we show how we can design powerful cross-layer networ k diversity techniques specially designed for broadband wireless systems e mploying block transmission techniques combined with frequency domain dete ction. </span></p>\n<p class="MsoNormal" style="text-align: justify\;"><sp an lang="EN-US" style="font-size: 11.0pt\; mso-bidi-font-size: 12.0pt\;">& nbsp\;<strong>Bio</strong></span></p>\n<p class="MsoNormal" style="text-al ign: justify\;"><strong style="mso-bidi-font-weight: normal\;"><span lang= "EN-US">Rui Dinis</span></strong><span lang="EN-US"> received the Ph.D. de gree from IST\, Technical University of Lisbon\, Portugal\, in 2001 and th e Habilitation in Telecommunications from FCT\, Nova University of Lisbon (UNL) in 2010 where he is a Full Professor. Rui Dinis is also researcher a t IT (Instituto de Telecomunica&ccedil\;&otilde\;es). During 2003 he was a visiting professor at Carleton University\, Ottawa\, Canada. </span></p>\ n<p class="MsoNormal" style="text-align: justify\;"><span lang="EN-US" sty le="font-size: 11.0pt\;">Rui Dinis is an IEEE ComSoc Distinguished Lecture r and an IEEE VTS Distinguished Speaker. He is or was editor at several ma jor IEEE journals (IEEE TWC\, TCOM\, TVT and OJ-COMS) and at Elsevier Phys ical Communication and Hindawi ISRN Communications and Networking. He was also a guest editor for multiple special numbers in several journals.</spa n></p>\n<p class="MsoNormal" style="text-align: justify\;"><span lang="EN- US" style="font-size: 11.0pt\;">He was involved in the organization of IEE E conferences\, namely several VTC and GLOBECOM\, and is a member of sever al technical committees of IEEE Communications Society. </span></p>\n<p cl ass="MsoNormal" style="text-align: justify\;"><span lang="EN-US" style="fo nt-size: 11.0pt\;">Rui Dinis has been actively involved in several interna tional research projects in the broadband wireless communications area. Hi s main research activities are on modulation and transmitter design\, nonl inear effects on digital communications and receiver design (detection\, e qualization\, channel estimation and carrier synchronization)\, with empha sis on frequency-domain implementations\, namely for MIMO systems and/or O FDM and SC-FDE modulations. He is also working on cross-layer design and o ptimization involving PHY\, MAC and LLC issues\, as well as indoor positio ning techniques.</span></p>\n<p class="MsoNormal" style="text-align: justi fy\;"><span lang="EN-US" style="font-size: 11.0pt\; mso-bidi-font-size: 12 .0pt\;">&nbsp\;</span></p>\n<p class="MsoNormal" style="text-align: justif y\;"><strong><img src="https://events.vtools.ieee.org/vtools_ui/media/disp lay/2966ab1a-2429-4927-876f-963f9e70f671" alt="" width="243" height="345"> </strong></p><br /><br />Agenda: <br /><p>12:00 PM: Refreshments</p>\n<p>1 2:30 PM: DL by Prof. Rui Dinis&nbsp\;</p> END:VEVENT END:VCALENDAR