Transcript Icom ID-800 D-Star Project Proposal (Powerpoint)

Icom ID-800 Radio Project
Miles Mann
WF1F
Marex-MG
July 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
Radio Header
Data
Bit
Synchronization
Frame Flag Flag Flag
Sync 1
2
3
64 bits
15 bits 8 bits 8 bits 8 bits
Radio ID
P_FCS
Destination
Repeater Call
Local
Repeater Call
Destination
Station Call
This
Station Call
This Station
Comment
64 bits/8 char
64 bits/8 char
64 bits/8 char
64 bits/8 char
32 bits/4 char
W7SP B
W7SP A
CQCQCQ
K7VE
JOHN
The DV Protocol
Radio Header
Audio Frame
72 bits
Data
Data Frame
24 bits
Final Data Frame
48 bits
Alternating Audio/Data
Zone Repeater Illustration
WA7GIE B
WA7GIE C
Controller
70 CM
UR: CQCQCQ
RPT1: WA7GIE B
RPT2: WA7GIE C
MY: K7VE
2M
UR: CQCQCQ
RPT1: WA7GIE C
RPT2: WA7GIE B
MY: KC7PAA
Zone Repeater Illustration
WA7GIE B
WA7GIE C
Controller
70 CM
UR: KC7PAA
RPT1: WA7GIE B
RPT2: WA7GIE C
MY: K7VE
2M
UR: K7VE
RPT1: WA7GIE C
RPT2: WA7GIE B
MY: KC7PAA
Gateway Illustration
WA7GIE B
K5TIT B
WA7GIE C
K5TIT A
Controller
Controller
“Repeaters and Gateways
should have club call signs…”
WA7GIE G
(Gateway)
K5TIT G
(Gateway)
GPS
70 CM
UR: N5MIJ
RPT1: WA7GIE B
RPT2: WA7GIE G
MY: K7VE
Internet
or
Backbon
e
23 CM
UR: K7VE
RPT1: K5TIT A
RPT2: K5TIT G
MY: N5MIJ
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
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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 …