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TAPR - Hamvention

The 2017 Dayton Hamvention, May 19-21, 2017


      7:00 PM - TAPR Board of Directors meeting at Hilton Gardens Inn in Miamisburg, OH.


      8:00 AM - Outside Exhibits Open
      9:00 AM - Inside Exhibits Open
      9:15 AM - TAPR Digital Forum
      6:00 PM - Exhibit Area Closes
      6:00 PM - TAPR/AMSAT Dinner


      8:00 AM - Exhibit Area Opens
      5:00 PM - Exhibit Area Closes


      8:00 AM - Exhibit Area Opens
      1:00 PM - Exhibit Area Closes

Dayton Hamvention general information is available at Hamvention site.

TAPR's Booth Space

TAPR Digital Forum

2017 Hamvention TAPR Forum Schedule

Friday, May 19, 2017

Moderator: Scotty Cowling, WA2DFI

Bio: Scotty was first licensed in 1967 and has been continuously active since that time. He is active while mobile on HF CW and on APRS. Scotty is an advisor for Explorer Post 599, a BSA affiliated ham club for teens in the Phoenix area. He has been involved in the openHPSDR project for the last 9 years, and is a TAPR Director and past TAPR Vice President. Scotty is also active in the production of openHPSDR components and other SDR projects. He is a co-founder of iQuadLabs, LLC, a supplier of openHPSDR systems and other Software Defined Radio components. He currently works at Zephyr Engineering, Inc, a computer consulting company that specializes in FPGA design and SDR hardware.

Friday, May 19, 2017

9:15 to 9:20AM Introduction by Steve Bible, N7HPR, TAPR President

9:20 to 9:25AM Write for QST/QEX by Kai Siwiak KE4PT, QEX Editor

9:25 to 9:50AM . "Low Cost, Open Source Spectrum Monitoring" by Michael Ossmann, AD0NR and Dominic Spill

Abstract: Over the past few months, we and other open source software developers have devised new tools allowing low cost Software Defined Radio platforms to rapidly sweep across radio frequencies in order to monitor the spectrum around us. Our base platform is HackRF One, and we are able to monitor 1 MHz to 6 GHz every 0.75 seconds, allowing us to build up a near real-time picture of radio usage around us. Now we are looking at new ways to visualize, analyze, and interpret this information. This will be a look at open source hardware and software tools that enable us to monitor, analyze, and track down radio signals.

Bios: Michael Ossmann is a wireless security researcher who makes hardware for hackers. He founded Great Scott Gadgets in an effort to put exciting, new tools into the hands of innovative people.

Dominic Spill is senior security researcher for Great Scott Gadgets. The US government recently labeled him as "extraordinary". This has gone to his head.

9:50 to 10:20AM "Advanced SDR Algorithms for Noise Blanking and Noise Reduction" by Warren Pratt, NR0V

Abstract: Wideband noise blankers and LMS noise reduction algorithms are commonplace in modern SDRs. With today's CPU power, more advanced algorithms offering superior performance can be made available. In this presentation, Dr. Pratt focuses on two such algorithms implemented in 2015 in the WDSP signal processing library for the openHPSDR program.
*The Spectral Noise Blanker uses linear predictive coding and often removes impulse noise under conditions where wideband blankers are ineffective. Impulses are detected by comparing the observed waveform with a predicted waveform. Impulses are corrected by recreating an estimate of corrupt portions of the original waveform using spectral information.
* The Spectral Noise Reduction algorithm operates in the frequency domain and, based upon statistical models of speech and noise, reduces random noise much more effectively than LMS algorithms. The seminal work for this approach was published by Yariv Ephraim and David Malah in 1984. However, the state of the art has advanced substantially over the past thirty years. To provide needed context, there is also a very limited introduction to wideband noise-blankers and LMS reduction algorithms, both of which are also available in WDSPnoiseblankers and LMS noiseAbstract: Wideband noise

Bio: Dr Warren C. Pratt, NR0V Dr. Warren Pratt was first licensed in 1965 and was an avid operator and builder of ham radio equipment in his youth. He received a PhD in Electrical Engineering from the University of Illinois in 1977 and then entered the computer hardware and software industry, beginning as an engineer but then spending most of his career in executive management. He held engineering management positions at Hewlett Packard, served as COO of Silicon Graphics, and as CEO of Alias, a 3D modeling and animation software company. Dr. Pratt is now retired and, in 2011, he joined the efforts of the openHPSDR program. He has written the WDSP digital signal processing library as well as other parts of the software that openHPSDR uses. He continues to enjoy exploring signal processing algorithms and supporting the openHPSDR program directions.

10:20 to 10:45AM "Introduction to RTL-SDR: Ultra cheap software defined radio" by Carl Laufer

Abstract: A brief overview of the RTL-SDR, an ultra low cost software defined radio that is opening the radio world up to new people. I will cover what the RTL-SDR is, what it can do, and how to set one up. The talk will also show some common applications and projects that it can be used for such as tracking aircraft and boats, receiving weather satellite images, decoding digital radio and more. The talk will also cover using SDRs together with portable computers such as the Raspberry Pi 3 for remote monitoring.

Bio: Carl Laufer is an electronics, software and radio enthusiast from New Zealand. After completing his PhD in machine learning he decided to pursue a new interest in the software defined radio world. He now runs the RTLSDR. com blog and web store, which specializes in news, projects and products related to ultra low cost software defined radio, and in particular the RTL-SDR dongle.


Joint TAPR/AMSAT Banquet Friday evening at Dayton.

Carl Laufer will discuss .The World of Low Cost Software Defined Radio.. Carl is the creator and author of the extremely popular RTL-SDR Blog, author of the book, .The Hobbyist Guide to RTL-SDR,. and supplier of the RTL-SDR dongle. The RTL-SDR dongle is a low-cost, receive-only SDR receiver that hobbyists around the world are using for a variety of radio receiver projects, and Carl blogs about them at http://www.rtl-sdr.com/

Dinner tickets must be purchased in advance at the AMSAT Store.

No tickets will be sold at either the AMSAT or TAPR booths.

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