Download - Digital Radio Project Presented by Greg Sarratt, W4OZK Alabama ARRL Section Manager GAREC-07 D-STAR
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Digital Radio Project
Presented by
Greg Sarratt, W4OZKAlabama ARRL Section Manager
GAREC-07D-STAR
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Digital Radio Is HereCommercial Radio
HDTVCell Phones
Digital, Amateur Radio mode for the 21st Century
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What is D-STAR?
Digital Smart Technology for Amateur Radio Developed by JARL and industry Digitally Modulated voice and data comms Open Protocol Specification Manufactured by ICOM, Kenwood Nationwide Digital Network
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AdvantagesMultitude of technical reasons
Internet Linking capability 6.25 KHz emission Simultaneous Voice and Data capability High speed Data capability 128kb data Allows more channels in crowded spectrum Frequency Agile
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AdvantagesMultitude of non-technical reasons
Emergency Communications New Technology Innovations Club projects Connects users together Call sign identification
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• BenefitsCall sign IdentificationSingle data stream
• Single infrastructure• Voice = GPS
Digital Data & Digital VoiceDigital Voice + GPS
Why say what you can send?
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DV + GPS
• I NEED HELP!
• WE ARE GOING DOWN!
• I FOUND HER!
Say it or Send itClarity of a text message
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Digital Advantages
Incorporate built-in error-correction techniques FEC: Foreword Error Correction
Recovered audio = Original fidelity
DV mode, Data Stream4800 kbps
2400 kbps VOICE
1200 kbps FEC
1200 kbps Serial DATA
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Repeater System Main Hardware
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Controller Server 2m digitized voice and low-speed data 70 cm digitized voice and low-speed data 23 cm digitized voice and low-speed data 23 cm high-speed data
Repeater System Main Hardware
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D-STAR is the fastest growing technology in amateur radio today!
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Network User Growth Users Date Delta
1 03-Feb-05 1st user
10 20-Jul-05 167 Days
20 15-Oct-05 87 Days
50 23-May-06 220 Days
100 29-Sep-06 128 Days
200 02-Dec-06 65 Days
300 08-Feb-07 64 Days
400 26-Mar-07 49 Days
500 10-May-07 45 Days
600 06-Jun-07 27 Days
700 07-Aug-07 62 Days
721 15-Aug-07 9 Days
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Leads the United States with D-STAR Systems, Activity, Users
and Development
Alabama has the highest concentration of digital repeaters in the United States!
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AlabamaEMA
Districts&
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W5GAD
KI4TMJ
KI4SAY
KC4IHG
W4IAX
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Alabama’s Reasons Emergency Communications Repeater Link System New Technology Innovations Education FUN Advancement of the hobby
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Emergency Communications
Alabama Repeater Link System Remote Connectivity Accurate Data Digital Data Personnel Tracking Internet capability
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Emergency Communications
Radios automatically transmit call sign with voice communications
GPS location transmit along with voice communications
Digital Data - Ends needless chatter
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Emergency Communications Partnership
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Emergency Communications Develop critical location systems 2 Full Portable Deployable systems
Link select In-State stations Link select Out of State stations Link directly to State EMA,
NAMB, ARRL
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Portable EMCOMM
D-STAR
Generator
FM Repeater
Tower acc
Antennas
Radios
Wi-Fi 802.11b
APRS Digi
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Exercises
21 July 2007
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Applications
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Applications
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Applications
Internet
Digital Data
Forms
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Applications
Text Messaging
Home Brew ______________ ______________ ______________
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DVX - Digital Voice TransceiverDVX - Digital Voice Transceiverby Moe Wheatley - AE4JYby Moe Wheatley - AE4JY
http://www.moetronix.comhttp://www.moetronix.com
Open Source/DesignOpen Source/Design
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D-Star WidgetD-Star Widgetby Robin Cutshaw – AA4RCby Robin Cutshaw – AA4RC
Replaces D-Star Controller or extends distance between controller and repeater modulesReplaces D-Star Controller or extends distance between controller and repeater modules
Open D-Star library encodes and decodes raw D-Star framesOpen D-Star library encodes and decodes raw D-Star frames
#ifndef _DSTARLIB_H#ifndef _DSTARLIB_H
#include <netinet/in.h>#include <netinet/in.h>
// dstarhdr_s length without crcstatus, 660 before convolution, 328 after// dstarhdr_s length without crcstatus, 660 before convolution, 328 after// the 328 bits (41 bytes) have "00" appended for 2*330=660 post convolution// the 328 bits (41 bytes) have "00" appended for 2*330=660 post convolution#define DSTAR_HEADER_ENC_LEN 660 // convoluted length (328 + 2) * 2#define DSTAR_HEADER_ENC_LEN 660 // convoluted length (328 + 2) * 2#define DSTAR_HEADER_DEC_LEN 328 // viterbi decoded length 41 bytes#define DSTAR_HEADER_DEC_LEN 328 // viterbi decoded length 41 bytes
// dstarhdr->crcstatus values// dstarhdr->crcstatus values#define DSTARHDR_CRCSTATUS_GOOD 1#define DSTARHDR_CRCSTATUS_GOOD 1#define DSTARHDR_CRCSTATUS_BAD 0#define DSTARHDR_CRCSTATUS_BAD 0
struct dstarhdr_s {struct dstarhdr_s { unsigned char flags1;unsigned char flags1; unsigned char flags2;unsigned char flags2; unsigned char flags3;unsigned char flags3; unsigned char rpt2[8];unsigned char rpt2[8]; unsigned char rpt1[8];unsigned char rpt1[8]; unsigned char urcall[8];unsigned char urcall[8]; unsigned char mycall[8];unsigned char mycall[8]; unsigned char mysuffix[4];unsigned char mysuffix[4]; unsigned char pfcs[2];unsigned char pfcs[2];};};
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Applications
μSmartDigi™ D-Gate
D-PRS® to APRS
APRS to D-PRS®
Rich Painter, AB0VO
D-STAR Monitor
Server based software package
Display user status
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Applications
www.dstarusers.orgAdditional Stats for SYSOP
D-STARLetA Web-based text messaging application
Uses D-STAR Digital technology
Dean Gibson, AE7Q
www.dstarlet.com
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Applications
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Applications
d*ChatA keyboard to keyboard chat application for
Windows.
Multiple stations simultaneously on a single simplex or repeater channel.
Brian Roode, NJ6N
http://nj6n.com/dstar/dstar_chat.html
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Applications
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DStarQuery
• Command ListEnter "?D*enter command here?"
• fon = list of important phone numbers • info = list of available commands • rptrs = list of area repeaters• ufo = current space weather conditions• wx = current weather conditions for your area • wx4 = 5-day weather forecast for your are
Java basedApplication monitors the serial data port for text commands or queries
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GPS-A Mode
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Hardware / Radios
Digital Repeater
2meter
70cm
23cm
23cm
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Conclusion
Digital Radio Is Here! Alabama is on the Digital forefront! Everyone’s a Winner
Amateurs Emergency Communications Public Service Ham Radio
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Additional Information [email protected] www.arrl-al.org www.icomamerica.com/dstar
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Backup Charts
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Cost Radios
IC-91A/D $449.95ID-800 $609.99IC-2820 $950.00ID-1 $979.99IC-2200 $139.95IC-V82&V*83 $119.95
UT-118 module for IC-2200,
IC-U82, & IC-V82 $189.00
RepeaterID-RP2000V 2m $1399.99ID-RP4000V 70cm $1399.99ID-RP2V 23 cm $1559.99ID-RP2D 23 cm $1112.99ID-RP2C Controller $1459.99
Total = $6933.95
+ Antennas, Feed line, Duplexers, Server, Internet connection.
Check for current prices
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