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Icom ID-800 Radio Project
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Transcript of Icom ID-800 Radio Project
Icom ID-800 Radio Project
Miles MannWF1F
Marex-MGJuly 2008
2008 Technology changes
• In 2006 I presented a Digital Voice solution.
• In 2 years the abilities of Digital have expanded tremendously.
• Person to Person calls are now supported world wide. An Amateur Radio user in the USA can place a Digital P-to-P call to a specific user in UK or Australia or Japan, etc.
Keep it Simple
• The ID-800 is a very simple dual band transceiver, 2 meters and 70 cm.
• All features will be handled from a simple channel knob.
• Channels 1,2,3 voice
• Channel 4 packet
• Channel 5 SSTV, etc.
ID-800
• Basic 2 / 70 cm transceiver
• Support for external TNC
• Built-in 1200 baud data channel with “Simultaneous” Voice.
• Supports Analog FM-5k, FM-2.5k and Digital Voice (DV)
• Heavy duty heat sink.
Digital Voice
• GMSK Digital Voice support
• Allows for Public or semi-private DV conversations.
• Will take ISS into the next generation of DV hardware.
• DV format compatible with other Amateur Radio DV systems (Icom, Kenwood and DV-Dongle)
New Digital Features
• Dial your Destination repeater*
• Person to Person calls*
• Radio to Laptop calls*
• Supports In-band 1200 baud data, while simultaneously running voice.
• *All calls to an from any Digital repeater in the world.
Repeater to Repeater
• With a D-Radio, you can dial up your Destination repeater.
• Any D-Repeater on the network can be accessed from any other D-Repeater.
• Example: ISS fly's over the Hawaii D-Repeater WH6DIG. Crew dials up the Destination repeater as \W5HDT via WH6DIG Houston Texas.
• All signals going into the Hawaii D-Repeater will pop out the Houston \W5HDT D-Repeater, with full 2-way support.
Person to Person
• With a D-Radio, you can dial up your Destination to be the call sign of a Person.
• Example: ISS fly's over the Hawaii D-Repeater WH6DIG. Crew dials up the call sign of a friend using a D-Radio, WF1F.
• It does not matter what Country WF1F is in, the D-Star network will automatically connect ISS to the last repeater used by WF1F.
• Instant 2-way contact.• If WF1F uses a different D-Repeater the next
day, the Person to Person call will still find him.
Radio to Laptop
• Radio to Laptop works the same way as Person to Person.
• Any USB compatible computer can attached a USB Dongle that supports Digital Radio (SRP $200.00).
• An ISS crew member can use his D-Radio to call friends and family at their home or office.
Benefits
• A simple channel based radio system, very user friendly
• Digital voice capability for semi-private communications experimentation
• Improved packet performance
• Extra large heat sink for improved cooling
• Reliable and in use by thousands
Terminology
• Digital Voice (DV)– 4800 bps data stream real time encoded with
• 2400 bps voice (AMBE encoded)• 1200 bps Forward Error Correction (FEC) for voice• 1200 bps data (text messages, GPS, telemetry,
etc.)
– 6.25 kHz. Bandwidth using GMSK
Terminology
• AMBE– Advanced Multi-Band Excitation (AMBE) is a very
powerful proprietary speech coding standard developed by Digital Voice Systems, Inc. (From: http://en.wikipedia.org/wiki/Advanced_Multi-Band_Excitation)
– Converts audio to and from the digital format used in D-Star Digital Voice at 2400 bps with 1200 bps of FEC.
• FEC– Forward Error Correction
The DV Protocol
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
The DV Protocol
DataRadio Header
Audio Frame72 bits
Data Frame24 bits
Final Data Frame48 bits
Alternating Audio/Data
Zone Repeater Illustration
Controller
70 CMUR: CQCQCQRPT1: WA7GIE BRPT2: WA7GIE CMY: K7VE
2 MUR: CQCQCQRPT1: WA7GIE CRPT2: WA7GIE BMY: KC7PAA
WA7GIE B WA7GIE C
Zone Repeater Illustration
Controller
70 CMUR: KC7PAARPT1: WA7GIE BRPT2: WA7GIE CMY: K7VE
2 MUR: K7VERPT1: WA7GIE CRPT2: WA7GIE BMY: KC7PAA
WA7GIE B WA7GIE C
Gateway Illustration
70 CMUR: N5MIJRPT1: WA7GIE BRPT2: WA7GIE GMY: K7VE
23 CMUR: K7VERPT1: K5TIT ARPT2: K5TIT GMY: N5MIJ
Controller
WA7GIE B
WA7GIE C
WA7GIE G(Gateway)
Controller
K5TIT B
K5TIT A
K5TIT G(Gateway)
Internet or Backbone
Internet or Backbone
GPS
“Repeaters and Gateways should have club call signs…”
The Numbers
• Countries 14+ (June 2008)
• Australia Argentina Austria Belgium Brazil Canada Germany Greece Italy Netherlands Norway Scotland UK USA Japan
• Repeaters 320+
• Word Wide users 3,500+
• New Users per day 33
Websites
• http://www.dstarusers.org• http://groups.google.com/utah-d-star-users • http://www.icomamerica.com• http://www.icomamerica.com/support/forums/• http://groups.yahoo.com/group/illinoisdigitalham• http://groups.yahoo.com/group/dstar_digital• http://k7ve.ampr.org• And many more …