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HXO D-Star Update 4-21-2012 W7AES Repeaters Mel Parrish with some content borrowed from K5TIT

HXO D-Star Update 4-21-2012 W7AES Repeaters Mel Parrish with some content borrowed from K5TIT. Agenda. Brief D-Star Overview (for newbies) Product Overview W7AES Status. D igital S mart T echnology for A mateur R adio Initial Development Japanese Amateur Radio League (JARL) Icom

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HXO D-Star Update 4-21-2012 W7AES Repeaters Mel Parrish with some content borrowed from K5TIT

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  1. HXO D-Star Update4-21-2012W7AES RepeatersMel Parrishwith some content borrowedfrom K5TIT

  2. Agenda • Brief D-Star Overview (for newbies) • Product Overview • W7AES Status

  3. Digital Smart Technology for Amateur Radio Initial Development Japanese Amateur Radio League (JARL) Icom Digital Voice & Data Point-to-Point Simplex or Duplex Repeaters World Wide Call Sign and Repeater Routing GPS Position Reporting What is D-Star?

  4. Radio/Repeater Characteristics • 1.2 GHz “DD” • 128 kbps Digital Data • Single Frequency Store-and-Forward Repeater • VHF/UHF/1.2 GHz “DV” • Simplex Point-to-Point or via Duplex Repeater • Simultaneous Digital Voice & Data – 4800 bps • 2400 bps Digital Voice • 1200 bps Forward Error Correction for Voice • 1200 bps Digital Data

  5. Gaussian Minimum-Shift Keying (GMSK) Spectrum Efficiency 6.25 kHz (-3 dB) Bandwidth 10 kHz Channel Spacing Possible RF Characteristics

  6. Network Characteristics

  7. Network Routing • Two Routing Methods • Site Routing • Where you want to talk • Specific System/Gateway and Port • User Routing • Who you want to talk • Specific User

  8. Applications & Modes

  9. Voice Digitization Technology • Advanced Multi-Band Excitation (AMBE) • Transform/Statistics-Based Algorithm • Multiple Frequency Bands (~20?), Analyzed for “Voiced”/“Unvoiced”, Envelope, Pitch, then Encoded • Reduces Data Redundancy • Lower Data Rate than Basic A/D for Equivalent Voice Quality • 2/3 Rate Forward Error Correction (FEC) Coding • 2400 bps Voice Data • 1200 bps FEC Appended

  10. Voice Digitization Process

  11. BitSynchronization64 bits FrameSync 15 bits Flag1 8 bits Flag 2 8 bits Flag 3 8 bits Radio ID P_FCS DestinationRepeater Call64 bits/8 char LocalRepeater Call64 bits/8 char DestinationStation Call64 bits/8 char ThisStation Call 64 bits/8 char This StationComment32 bits/4 char W7SP B W7SP A CQCQCQ K7VE JOHN Open DV Protocol Radio Header Data

  12. Radio Header Length 16 bits Ethernet Style Packet BitSynchronization64 bits FrameSync 15 bits Flag1 8 bits Flag 2 8 bits Flag 3 8 bits Radio ID P_FCS DestinationRepeater Call64 bits/8 char LocalRepeater Call64 bits/8 char DestinationStation Call64 bits/8 char ThisStation Call 64 bits/8 char This StationComment32 bits/4 char W7SP B W7SP A CQCQCQ K7VE JOHN Open DD Protocol

  13. Current Repeater/User Stats • At Least 920 Icom G2 Gateways Worldwide • G2 Gateway Routing SW Proprietary to JARL/Icom • 42 Countries • At Least 19,500 Gateway-Registered Users • At Least 872 ircDDB Activated Gateways Worldwide • “internet relay chat Distributed Data Base” • Open Software • 20 Countries; Most Gateways in Germany • At Least 6,042 Users

  14. Reflectors • Accessed Same as Gateways • At Least 50 Reflector Servers Activated • Affinity Groups: • DX, Regional, Tech, Emcomm, etc. • Connection via Third-Party Software • D-Plus (used on W7AES) • DCS • DExtra

  15. D-Star Radio Products

  16. Icom D-STAR Controller & Repeaters

  17. Typical “Full” Stack (like W7AES)

  18. Icom D-Star Radio Products IC-2820AH ID-31A ID-880AH IC-80AD IC-91AD IC-92AD ID-1 IC-9100

  19. IC-2820H GPS Display Dual-band radio display GPS Display

  20. Third Party Products DV Acccess Point (DVAP) (VHF Radio-to-Internet Interface) DV Dongle (No Radio Required) DVRPTR Open Source Hotspot Modem

  21. DV Dongle Menu

  22. D-RATS Free Software A Communications Tool For D-STAR

  23. D-RATS Message List

  24. D-RATS Chat Display

  25. D-RATS File Transfer

  26. D-RATS Map Display

  27. D-RATS Forms • Includes Form Editor to Create Any Form • Only Data is Sent • Fully printable ICS-213, ARRL Radiogram and NTS Forms Included

  28. W7AES Arden Install Status

  29. Arden View from Ice Bridge180 deg, centered north

  30. The Arden D-Star Participants(so far) Not Shown: Blayne KG7SS Dale W7IXK Jeff KR7JD Lee N7LD Nat W7OQF Ralph N7TND George KF2T Mel K6UV Gene KK4IB Frank N7ZEV Bill W7HMV

  31. Some Useful Web Sites www.icomamerica.com/support/forums www.K5TIT.Org/Forum Some D-STAR Web Sites: http://www.d-starusers.org/ http://www.d-rats.com/ www.aprs-is.net/dstartnc2.htm

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