New Amateur Radio digital mode - V4

V4 is a new data mode optimized for amateur radio keyboard contacts using Viterbi FEC and 4FSK modulation.

It is designed to provide good copy even in weak signal or poor propagation conditions.

V4 can be implemented on most computers using standard PC sound cards with radio interfaces.

An Alpha version of the software can be downloaded from the files section of the V4 Protocol Yahoo Group.

http://groups.yahoo.com/group/V4Protocol/

V4 Protocol and V4 Chat document
http://www.winlink.org/webfm_send/169

Source : www.southgatearc.org

Call for Papers :: ARRL/TAPR Digital Communications Conference - 2010

Technical papers are solicited for presentation at the 29th Annual ARRLand TAPR Digital Communications Conference to be held September 24-26,2010 in Portland, Oregon. These papers will also be published in theConference Proceedings (you do NOT need to attend the conference to haveyour paper included in the Proceedings) .

The submission deadline is July31, 2010.

Please send papers to:

Maty Weinberg

ARRL

225 Main St

Newington,

CT 06111

or you can make your submission via e-mail to: maty@arrl.org

Papers will be published exactly as submitted and authors will retainall rights.

73 . . . Steve, WB8IMY
sford@arrl.org
ARRL

New Digital Mode

ROS is a brand-new Amateur Radio digital spread spectrum mode with the first HF contact taken place on Thursday February 18, 2010

The first contact with ROS took place on February 18, 2010, at 20:56 UTC from Vitoria in Spain to the University of Twente in the Netherlands covering a distance of 1265 Km on 7.065 MHz.
The HF frequencies currently used for ROS are USB 3.600, 7.053, 14.101, 28.300 MHz


To use ROS you just need your HF radio, a PC and a basic PC sound card interface.

The software for ROS is free. You can download it along with the User Guide and Introduction at http://rosmodem.wordpress.com/