Copies of the papers presented at, or published for DCC are available in various ways. A paper printed in the proceedings will be available for purchase in most cases in hard copy as the DCC proceedings. It will in most cases also be available as an individual paper in PDF format as a free download via a link below the abstract (where available) It may also be available on CD-ROM. A paper printed in the proceedings may not have been presented at the conference. Also a presentation at DCC may not be in the printed proceedings. In those cases it may be available on DVD, CD-ROM or as a MP3 download. Links to what is available will be on the page specific to the particular year's DCC.
- Denver, Colorado
Read the conference story with audio and photos.
21st ARRL and TAPR Digital Communications Conference
September 13-15, 2002
- 1-Wire APRS Weather Station
by William Beals, N0XGA and Russell Chadwick KB0TVJ
This project and resulting TAPR kit implement the necessary hardware and
software to sense and display data from various low-cost I-Wire weather
sensors. With the addition of a TNC and radio, it forms a complete,
stand-alone APRS-compatible weather station. Weather information is also
available on a 4-line by 20-character LCD. The project is designed to be
easily extensible and upgradeable--even for applications that are
not weather related.
by Richard E Carter, KE1EV
This paper describes the PIC-E-II project. It includes information
gathered from various sources or researched directly using test
equipment. From a high-level, it describes what a packet is, what a PIC
is, and how the PIC-E-II works.
- APRSWXNET/CWOP - A Beneficial Partnership of NOAA, Amateur Radio and Other Good Citizens
by Russ Chadwick, KB0TVJ
APRSWXNET/CWOP is a group of amateur radio operators and other citizens
who have an interest in weather measurements and contribute those data
to NOAA for important uses. This paper describes how the data is
collected via packet radio and via the Internet. Where the data go and
how they are used is also covered. Maps of the location of the data
contributors for both packet radio and for the Internet are presented.
- Automatic Packet Reporting System: Building a Large Scane Geospatial Database
by James Jefferson Jarvis, KB0THN
The purpose of my research is collecting and analyzing position data
from amateur radio's Automatic Packet Reporting System (APRS). APRS
equipped vehicles transmit their latitude, longitude, course, and speed.
This data is received via VHF radio and aggregated into the APRS
I designed and implemented a system that automatically collects and catalogs the entire APRS Internet stream into a relational database. Because APRS data is expressed in various formats, I wrote a parser that translates the data to a common format. My software collected more then 52,000,000 data points in 3 months.
I developed software to analyze position data. One program determines what polygon latitude / longitude points falls inside, and locates a station within a political boundary. For use in detecting roadway traffic problems, another program searches digital maps for the distance to the nearest road. Overall I wrote approximately 10,000 lines of computer source code. Currently I am investigating using neural networks to detect characterize roads and be able to detect anomalies, such as traffic jams.
- Created Realities Technology in Amateur Radio
by Greg Jones, WD5IVD
This paper discusses the possibilities of Created Realities Technology
in amateur radio. The paper discusses its use in education/learning,
communications, and information presentation. The creation of meaningful
3D spaces for both communications and information presentation can add a
new dimension to amateur radios presentation and teaching.
- Repeater Data Transmission System
by Peter Mudie, VK2XZP
The paper describes a specialised data communications system. The data
system has the capability of carrying low data rate information over an
analogue radio channel at the same time as voice traffic. It is based on
the capstone project I completed in order to receive my Bachelor of
- On Amateur Radio Use of IEEE 802.11b Radio Local Area Networks
by Paul L. Rinaldo, W4RI and John J. Champa, K8OCL
The 2400-2450 MHz band is not only an amateur frequency allocation but
is used by other services. Primarily, it's an industrial, scientific and
medical (ISM) band with a center frequency of 2450 MHz. Other users of
the band must accept any interference from ISM emitters.
- Emergency Radio Email (ER-Email)
by Paul Schreiber, W2UH
This description of ER-Email is submitted to the Digital Communications
Conference to solicit from this pool of experts (1) a realistic
assessment its potential as an important emergency communications mode,
(2) the effort required to develop it, and (3) what group or individuals
are willing to develop it.
I feel very strongly that Emergency Radio-Email has the potential of becoming an important ARES/RACES emergency communications mode with a very high degree of acceptance among served agencies. The name was chosen to quickly convey to served agencies what ER-Email will do for them.
- 802.11 and Ham Radio
by Darryl Smith, VK2TDS
The price of 802.11b equipment is continuing to fall. Once retailing for
hundreds of dollars, PCMCIA 802.11b cards are now retailing for under
$50. These cards contain sophisticated hardware and software that rivals
most ofthe digital technology used in the Ham Radio world today.
If Ham Radio is to survive in the coming years, it is areas such as 802.11b that can be used not only to attract those interested in digital communications, but also as a building block for our own networks.
In this paper I will describe some of the technology, and some of the areas that Ham Radio operators can investigate in order to extend the state of the art.
- A Software-Defined Radio for the Masses, Parts 1 and 2
by Gerald Youngblood, AC5OG
This series describes a complete PC-based software-defined-radio that
uses a sound card and an innovative detector circuit. Mathematics is
minimized in the explanation. Come see how it's done.
Come learn how to use a PC sound card to enter the wonderful world of digital signal processing.