BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Australia/Melbourne BEGIN:DAYLIGHT DTSTART:20231001T030000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=10 TZNAME:AEDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20240407T020000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4 TZNAME:AEST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20231112T232009Z UID:99615A02-51E0-414F-B29C-9BB0F310934A DTSTART;TZID=Australia/Melbourne:20231110T180000 DTEND;TZID=Australia/Melbourne:20231110T190000 DESCRIPTION:There has been significant research devoted to the development of distributed microwave wireless systems in recent years. The progression from large\, single-platform wireless systems to collections of smaller\, coordinated systems on separate platforms enables significant benefits fo r radar\, remote sensing\, communications\, and other applications. The ul timate level of coordination between platforms is at the wavelength level\ , where separate platforms operate as a coherent distributed system. Wirel ess coherent distributed systems operate in essence as distributed phased arrays\, and the signal gains that can be achieved scale proportionally to the number of transmitters squared multiplied by the number of receivers\ , providing potentially dramatic increases in wireless system capabilities . Distributed array coordination requires accurate control of the relative electrical states of the nodes. Generally\, such control entails wireless frequency synchronization\, phase calibration\, and time alignment\, but for remote sensing operations\, phase control also requires high-accuracy knowledge of the relative positions of the nodes in the array to support b eamforming.\n\nThis lecture presents an overview of the challenges involve d in distributed phased array coordination\, and describes recent progress on microwave technologies that address these challenges. Requirements for achieving distributed phase coherence at microwave frequencies are discus sed\, including the impact of component non-idealities such as oscillator drift on beamforming performance. Architectures for enabling distributed b eamforming are reviewed\, along with the relative challenges between trans mit and receive beamforming. Microwave and millimeter-wave technologies en abling wireless phase-coherent synchronization are discussed\, focusing on technologies for high-accuracy internode ranging\, wireless frequency tra nsfer\, and high-accuracy time alignment. The lecture concludes with a dis cussion of open challenges in distributed phased arrays\, and where microw ave technologies may play a role.\n\nSpeaker(s): A/Prof. Jeffrey Nanzer\, \n\nRoom: level 3\, room 6\, Bldg: 80\, RMIT University \, 445 Swanston St reet Melbourne\, Melbourne\, Victoria\, Australia LOCATION:Room: level 3\, room 6\, Bldg: 80\, RMIT University \, 445 Swansto n Street Melbourne\, Melbourne\, Victoria\, Australia ORGANIZER:fatemeh.babaeian@ieee.org SEQUENCE:25 SUMMARY:DML: DISTRIBUTED PHASED ARRAYS: CHALLENGES AND RECENT PROGRESS URL;VALUE=URI:https://events.vtools.ieee.org/m/377830 X-ALT-DESC:Description: <br /><p>&nbsp\;</p>\n<p>There has been significant research devoted to the development of distributed microwave wireless sys tems in recent years. The progression from large\, single-platform wireles s systems to collections of smaller\, coordinated systems on separate plat forms enables significant benefits for radar\, remote sensing\, communicat ions\, and other applications. The ultimate level of coordination between platforms is at the wavelength level\, where separate platforms operate as a coherent distributed system. Wireless coherent distributed systems oper ate in essence as distributed phased arrays\, and the signal gains that ca n be achieved scale proportionally to the number of transmitters squared m ultiplied by the number of receivers\, providing potentially dramatic incr eases in wireless system capabilities. Distributed array coordination requ ires accurate control of the relative electrical states of the nodes. Gene rally\, such control entails wireless frequency synchronization\, phase ca libration\, and time alignment\, but for remote sensing operations\, phase control also requires high-accuracy knowledge of the relative positions o f the nodes in the array to support beamforming.</p>\n<p>This lecture pres ents an overview of the challenges involved in distributed phased array co ordination\, and describes recent progress on microwave technologies that address these challenges. Requirements for achieving distributed phase coh erence at microwave frequencies are discussed\, including the impact of co mponent non-idealities such as oscillator drift on beamforming performance . Architectures for enabling distributed beamforming are reviewed\, along with the relative challenges between transmit and receive beamforming. Mic rowave and millimeter-wave technologies enabling wireless phase-coherent s ynchronization are discussed\, focusing on technologies for high-accuracy internode ranging\, wireless frequency transfer\, and high-accuracy time a lignment. The lecture concludes with a discussion of open challenges in di stributed phased arrays\, and where microwave technologies may play a role .</p> END:VEVENT END:VCALENDAR