HXO D-Star UpdateHXO D-Star Update4-21-20124-21-2012

W7AES RepeatersW7AES Repeaters

Mel ParrishMel Parrishwith some content borrowedwith some content borrowed

from K5TITfrom K5TIT

AgendaAgenda

• Brief D-Star Overview (for newbies)

• Product Overview

• W7AES Status

• 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?What is D-Star?

Radio/Repeater CharacteristicsRadio/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

– Gaussian Minimum-Shift Keying (GMSK)

– Spectrum Efficiency• 6.25 kHz (-3 dB) Bandwidth• 10 kHz Channel Spacing Possible

RF CharacteristicsRF Characteristics

Network CharacteristicsNetwork Characteristics

Network RoutingNetwork 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

Applications & ModesApplications & Modes

• 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

Voice Digitization TechnologyVoice Digitization Technology

Voice Digitization ProcessVoice Digitization Process

DataRadio Header

Radio IDBit

Synchronization64 bits

FrameSync15 bits

Flag2

8 bits

Flag1

8 bits

Flag3

8 bits

P_FCS

This StationComment32 bits/4 char

DestinationRepeater Call

64 bits/8 char

LocalRepeater Call

64 bits/8 char

DestinationStation Call64 bits/8 char

ThisStation Call64 bits/8 char

W7SP B

W7SP A

CQCQCQ K7VE JOHN

Open DV ProtocolOpen DV Protocol

Radio IDBit

Synchronization64 bits

FrameSync15 bits

Flag2

8 bits

Flag1

8 bits

Flag3

8 bits

P_FCS

This StationComment32 bits/4 char

DestinationRepeater Call

64 bits/8 char

LocalRepeater Call

64 bits/8 char

DestinationStation Call64 bits/8 char

ThisStation Call64 bits/8 char

W7SP B

W7SP A

CQCQCQ K7VE JOHN

Ethernet Style PacketRadio HeaderLength16 bits

Open DD ProtocolOpen DD Protocol

Current Repeater/User StatsCurrent 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

ReflectorsReflectors• 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

D-Star Radio ProductsD-Star Radio Products

Icom D-STAR Controller & RepeatersIcom D-STAR Controller & Repeaters

Typical “Full” Stack (like W7AES)Typical “Full” Stack (like W7AES)

Icom D-Star Radio ProductsIcom D-Star Radio Products

ID-31A

IC-80ADIC-91ADIC-92AD

IC-9100

ID-880AH

ID-1

IC-2820AH

IC-2820H GPS DisplayIC-2820H GPS Display

GPS DisplayGPS Display

Dual-bandDual-bandradio displayradio display

Third Party ProductsThird Party Products

DVRPTR Open Source Hotspot ModemDVRPTR Open Source Hotspot Modem

DV Acccess Point (DVAP)DV Acccess Point (DVAP)(VHF Radio-to-Internet Interface)(VHF Radio-to-Internet Interface)

DV Dongle(No Radio Required)

DV Dongle MenuDV Dongle Menu

D-RATS Free Software D-RATS Free Software

A Communications Tool For D-STAR

D-RATS Message List D-RATS Message List

D-RATS Chat DisplayD-RATS Chat Display

D-RATS File TransferD-RATS File Transfer

D-RATS Map Display D-RATS Map Display

D-RATS FormsD-RATS Forms

• Includes Form Editor to Includes Form Editor to Create Any FormCreate Any Form

• Only Data is SentOnly Data is Sent

• Fully printable ICS-213, ARRL Fully printable ICS-213, ARRL Radiogram and NTS Forms Radiogram and NTS Forms IncludedIncluded

W7AES Arden Install StatusW7AES Arden Install Status

Arden View from Ice BridgeArden View from Ice Bridge180 deg, centered north180 deg, centered north

The Arden D-Star ParticipantsThe Arden D-Star Participants(so far)(so far)

Mel K6UV Gene KK4IB Frank N7ZEV

Ralph N7TND

Bill W7HMV

George KF2T

Not Shown:

Blayne KG7SSDale W7IXKJeff KR7JDLee N7LDNat W7OQF

Some Useful Web SitesSome 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