Presentation by Prof.gamantyo HF Communication System

|
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
 10 views
of 2

Please download to get full document.

View again

Description
11/07/2013 Radio Wave Propagation and Wireless Communications Research Group Radio Wave Propagation and Wireless Communications Research Group Motivation PREDICT JR B3‐3 ã HF radio communications  – viable technique for long‐distance communication – due to wave multiple reflection by ionospheric layers and earth  surface – cheap compared to satellite or wired HF Communication System Design for Wideband Long-Distance Communications in Equatorial Regions Gamantyo Hendrantoro Department  of El
Share
Tags
Transcript
  11/07/20131 HF Communication System Design forWideband Long-Distance Communicationsin Equatorial Regions Gamantyo   HendrantoroDepartment   of    Electrical   EngineeringInstitut   Teknologi   Sepuluh   NopemberSurabaya   2013 Radio Wave Propagation and Wireless Communications Research Group PREDICT   JR   B3 ‐ 3 Motivation ã HF   radio   communications   – viable   technique   for   long ‐ distance   communication – due   to   wave   multiple   reflection   by   ionospheric   layers   and   earth   surface – cheap   compared   to   satellite   or   wired ã However,   equatorial   ionosphere   imposes   various   distortions   to   HF   wave   propagation – ESF – Solar   storm – Sporadic   E ã Problems: – An   accurate   equatorial   channel   model – HF   communication   system   design   based   on   the   channel   model Radio Wave Propagation and Wireless Communications Research Group HF Communications Research Roadmap Radio Wave Propagation and Wireless Communications Research Group Indah   Kurniawati   (S3)   +   3   mhs   S1Paramita   Lestari   (S2)Daru   Brilyantarto   (S2) Research   strategy   /   roadmap Radio Wave Propagation and Wireless Communications   Research Group Estimated   time   for   Tx   installation   at   Merauke:   Sept ‐ Nov   2013,   depending   on   purchase   time.  11/07/20132 Possible Methods for HF Communications ã Adaptive   carrier   frequency – To   adapt   to   the   time ‐ varying   ionospheric   condition ã Adaptive   equalization – To   compensate   for   HF   channel   ISI – Because   the   channel   is   time ‐ varying,   equalizers   must   be   adaptive ã OFDM – Another   way   to   compensate   for   ISI – Pilot   tones   are   needed   to   update   the   channel   response   periodically ã Cooperative   diversity – Use   additional   relayed   multi ‐ hop   links   to   achieve   diversity ã E.g.   for   Surabaya ‐ Merauke   communication,   an   additional   relayed   two ‐ hop   link   Surabaya ‐ Manado ‐ Merauke   might   be   used   for   diversity Radio Wave Propagation and Wireless Communications Research Group Present Research Team ã ITS – Gamantyo   Hendrantoro – Achmad   Mauludiyanto – Prasetiyono   Hari   Mukti – Devy   Kuswidyastuti – Indah   Kurniawati   (S3,   dosen   UNMUH   Sby) – Daru   Brilyantarto   (S2,   Schneider   Indonesia) – Paramita   E.   W.   Lestari   (S2) – Nisa   Rahmadina   (S1) – Aryo   Darma   (S1) – Freddy   Kurniawan   (S1) ã Universitas   Musamus – Roberto   Corputty – Muriani ã Kumamoto   University – Takeshi   Fukusako ã LAPAN – Jiyo Radio Wave Propagation and Wireless Communications Research Group Thank You
Related Search
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks
Disobedience (2017) | Im Ji Yeon | The Exorcist (44)