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GNU Radio is one of those things that I keep threatening to learn, but never get around to doing. According to their website:. It can be used with readily-available low-cost external RF hardware to create software-defined radios, or without hardware in a simulation-like environment.

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It is widely used in research, industry, academia, government, and hobbyist environments to support both wireless communications research and real-world radio systems. Like other virtual events, GRCon is making many of the presentations free and open to the public.

The conference schedule lists a number of interesting to me, at least talks, including:. To register, and it appears that you have to register even for the free talks, go to the registration page. I searched Amazon for books on GNU Radio, but only found one in Englishand that book was published in and out of print! There is one in Spanish and others in Japanese, though. The new, updated version of my Extra Class study guide is available in PDF and Kindle versions, as well as "smart" flash cards.

Click here to get all of my "No Nonsense" study guides and "smart" flash cards. They consist of four, two-hour Zoom meetings. The next class will start on Monday, September Register here. It will be either one night a week for eight weeks or two nights a week for four weeks. All About Circuits — Electronics community featuring textbooks, video lectures and forums. You can advertise here, too! General class starting in September!

Support KB6NU. Measuring 4. H, it's perfect for your car, your shack, or wherever! Like the "No Nonsense" study guides on Facebook:. Steve Gutknecht on Do you feel violated? Wireless Computing. Subscribe by e-mail To get an e-mail whenever I post new content, enter your email address here:. Contact me If you have a problem with your order, or a comment about my study guides, or just want to talk about ham radio in general, the easiest way to contact me is by e-mail.

My e-mail address is cwgeek at kb6nu dot com. If you'd like me to call you back, make sure to include your phone number. Are you a ham radio club newsletter editor? Sign up to get my monthly column. Romanchik, KB6NU. Please don't use this content without my permission.In the last post, I showed you how you could experiment with it just by using a sound card or even less.

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However, who can resist the lure of building an actual radio by dragging blocks around on a computer screen? This little black box has an antenna jack on one end and a USB port on the other. However, you can also use cheap TV dongleswith some limitations. On the other hand, they are dirt cheap, so you can overlook a few little wrinkles.

Some people add amplifiers and converters to overcome these problems, but at some point it would be more cost effective to just spring for a more expensive converter.

With a crystal radio you have a big coil and some kind of capacitor that has a tendency to select a certain radio frequency. By select, I mean it will pick out a certain frequency and reject other frequencies. AM radios carry modulation that is, sound, in this case by varying the amplitude of the carrier wave. A diode can recover that varying amplitude and a crystal radio might use a germanium diode, a galena crystal hence the nameor even a razor blade and a safety pin.

For example, the Tuned Radio Frequency TRF radio used tuned amplifiers before the diode detector to selectively strengthen the signal you wanted to hear. The problem with the TRF is you have to tune each stage to the frequency you want.

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In this scheme, the input signal may be selected and amplified but then it is mixed with a local oscillator. The mixer will add and subtract the local oscillator frequency from the signal. Suppose the input to our radio has two signals: one at kHz the one we want to hear and another at kHz. Further suppose that the local oscillator is set for kHz.

Why is this important? Because we can now build highly tuned amplifiers that amplify signals at kHz known as the intermediate frequency or IF and reject other signals.

GnuRadio HRPT Decoders

That means they are simpler to operate and simpler to make very efficient. For example, good radios might use a crystal filter to reject all the extra frequencies. After demodulation, the radio probably amplifies the audio signal to drive speakers or headphones. To recap, the basic layout is RF front end, mixer and local oscillator, IF amplifiers and filters, demodulation, and, finally, audio amplification. Remember this, because many of these same pieces will show up in one form or another in a software defined radio.

The IQ data comes in and represents the entire signal available. One thing that is paramount with a software defined radio is the sampling rate. If you want a bandwidth of, say, 1 MHz, you need to sample at 2 MHz at least. Decimating a signal by 4 will essentially divide the sample rate by 4. Interpolating by 2 will double the apparent sample rate. For example to go from kHz to But you could interpolate by and decimate by to get the result you wanted. The most important block is the Osmocom block see picture to the right that connects to the SDRPlay box.

The properties of this block set the receive frequency, the bandwidth, and the RF gain.This collaboration is an extension of work begun in to build open-source hardware and software, accessible to both hobbyists and professional SETI scientists, including a GNU Radio module known as gr-ata.

But I soon discovered there was a whole community of people developing and building cutting-edge devices with this technology, and they welcomed me into their collaboration. GNU Radio is an excellent teaching tool for students interested in radio engineering, digital signal processing, radio astronomy, SETI, and related fields. Collaboration with the education and outreach team at the SETI Institute has the potential to increase the accessibility and reach of these tools for a wide range of education audiences, including high school and undergraduate students, as well as amateurs who wish to set up GNU Radio powered radio telescopes at home.

Scientific research at the SETI Institute encompasses everything from the Big Bang and formation of stars, to planets and habitability to life and complexity — and it is in the area of SETI science search for extraterrestrial intelligenceor technosignature searches, that it is perhaps best known.

Upgrades currently underway at the ATA will significantly increase the ATA's receivers' sensitivity and permit the development of a new digital signal processing system that will bring enhanced capabilities.

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GNU Radio on the ATA is providing a much easier path to entry for experts from industry to engage with radio telescopes without needing to learn specialized software systems. Techniques from the RF industry for identifying and classifying signals have great promise in sifting through the "haystack" of human-generated radio frequency interference in search of the technosignature "needle.

We look forward to the innumerable possibilities unleashed through this partnership. GNU Radio will be hosting its tenth annual conference next weekSeptemberwhich will take place virtually for the first time. Registration for the main track is free; full paid registration allowing access to the hands-on workshop is sold out, but there's a waiting list, and additional spots may open up.

SETI Institute researchers will be taking part in the conference:. It is widely used in research, industry, academia, government and hobbyists. Its active online community and multiple annual events are a focus for the development of new signal processing algorithms and techniques and attract hundreds of contributors. Founded inthe SETI Institute is a non-profit, multi-disciplinary research and education organization whose mission is to explore, understand, and explain the origin and nature of life in the universe and the evolution of intelligence.

Our research encompasses the physical and biological sciences and leverages expertise in data analytics, machine learning and advanced signal detection technologies.

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About the SETI Institute Founded inthe SETI Institute is a non-profit, multi-disciplinary research and education organization whose mission is to explore, understand, and explain the origin and nature of life in the universe and the evolution of intelligence.GNU Radio release 3. Release 3. Additional work not discussed here from these events has been incorporated into the 'next' branch of the code repository, and will become part of the 3. New features include asynchronous message passing between blocks, new blocks for interfacing with operating system networking stacks, the ability to write new signal processing blocks in Python, enhanced file source and sinks that can store metadata, flowgraph latency control, improvements to documentation, and further conversion of existing code into the 3.

The detailed changelog is here:. Contributors this release:. Olivain lacime. Given the amount of new code introduced, we are closing the merge window for features on the master branch, providing one or more release candidates, and only merging bug fixes until a formal 3.

This release contains the new gr-filter top-level component, some new signal processing blocks, and numerous bug fixes. We have stopped creating a separate gr-howto-write-a-block tarball; its contents are now distributed within the main gnuradio tarball.

This release contains numerous bug fixes, some new signal processing blocks, a new Python API documentation system, and the first steps in the code reorganization that will become complete in the 3. GNU Radio release version 3. Release notes are here:. The release notes are here:.

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This is the last planned 3. Work on the master branch will be focused on generating a 3. This is a bug fix release to address certain issues with the operation of libvolk on bit machines. The updated tarball is at:. The tarballs are available at:. The release tarballs are available here:. The release candidate tarball is available here:. GNU Radio 3. This is the first release candidate for the 3.

GNURadio 3. GNU Radio Release 3.Read Full Statement. While the previous post still holds some extremely valuable information, a lot has changed in 3 years So we thought it was time for an update. Like last time, we tried to include as much diversity in terms of prices, applications, frequencies, and ease of use. Our hope is the perfect software defined radio for your application is on this list.

Without further ado, here are 10 great Software Defined Radios available in to take your electronic designs further:. Designed to enable test and development of modern and next generation radio technologies, HackRF One is an open source hardware platform that can be used as a USB peripheral or programmed for stand-alone operation.

The Ubertooth One is an open source 2. This operating mode of the Ubertooth One has been present in low-cost WiFi modules for years and has found myriad uses in research, development and security auditing but no such solution existed for the Bluetooth standard until now.

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It uses the same radio circuit as the popular IM-Me. RfCat allows you to control the wireless transceiver from an interactive Python shell or your own program running on your computer. An antenna is not included.

You simply add an antenna, power supply and network connection. Software supplied on a micro-SD card. Up to four people can listen simultaneously to one radio — each listener tunes independently. Power consumption has been reduced while improving sensitivity and lowering the noise floor.

A high quality telescopic antenna and strong magnetic suction mount base included free of charge in order to facilitate a wide variety of antenna mounting options.

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The perfect device for learning software defined radio, on the cheap. Outperforms many devices 10x its cost!

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Brand new design! The enclosure was also re-designed to assist in maintaining lower temperatures than the previous generation. How small? Tunes from kHz to 1. HF mode works in direct sampling mode - V3 models and above only. This model has several improvements over other models. It also comes with a software activatable bias-tee circuit for powering external devices such as LNA's and active antennas. Improvements include increased sensitivity, ultra-low voltage noise floor, optional battery-powered operation, side-mounted LED indicators, fully-assembled broadband RF noise-source circuit, u.

The included accessories allow for a wide variety of installation and configuration options. The included Y-cable and Y-adapter will allow for an auxiliary power source to be connected USB charger or additional battery to provide power to the SDR and prolong the battery life of your host phone or tablet.

A full, wide-band RF solution for those interested in getting started with software defined radio and with a keen interest in HF bands. This results in a vastly different HF experience--much better performance, and no loss of gain controls. Included is a Ham It Up v1.

Full Disclosure: Some of the links above are affiliate links, meaning, at no additional cost to you, we will earn a small commission in you click through and make a purchase. Topics: RF Technologygeneral. Inside Frequency Control.

Ham It Up v1.The Shape of WaterLead Actor 1. Margot RobbieSupporting Actor 1. Richard JenkinsSupporting Actress 1. Kristen Scott Thomas 4.

Octavia SpencerBest Director 1. Guillermo Del Toro 3.

GnuRadio HRPT Decoders

Greta GerwigThe huge contenders this year are Dunkirk, The Shape of Water, and Call Me By Your Name. After his comments about the Hollywood Foreign Press, will Gary Oldman win the Golden Globe. Or even be nominated. I can see a that happening. But I honestly think it will not affect his chances at the other important awards and the Oscars. After his comments about Hollywood Foreign Press, will Gary Oldman win the Golden Globe. I can see that happening.

Can someone explain to me the Holly Hunter thing. I thought Hunter was a real delight and worthy of a nomination. An Oscar win, though, perhaps not. For the finest in film reviews and awards analysis, please visit me at The Awards Connection. More will be added soon. What foreign language film will.

Bird Was Regina King snubbed for "Ray". OscarsAreStupid 2017 Globes de Cristal nominations for Best Film, Best Actress and Best Actor FreemanGriffin Best and Worst Number 1 songs 2017 smurty11 2017 Los Angeles Film Critics Assocation Awards Predictions pacinofan National Board of Review Winners (2017) Album of the Year Richard Aniston Best Pop Solo Performance Madson Melo Who is the Best Picture Front-Runner. Nikhil Stay informed with our weekly Newsletter About UsAdvertiseNewsletterTerms of UsePrivacy PolicyYour Privacy RightsContact Us Deadline variety.

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Charlie Nicholas provides us with his Europa League predictions for Thursday night's action.All race bets are settled on the official classification from the Federation Internationale de l'Automobile (FIA), the sport's governing body, at the time of the podium presentation.

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Each participant is priced to be the top driver over the Formula 1 season in accordance with Drivers Championship standings, and rules as specified by the FIA. Each participant is priced to be the top constructor over the Formula 1 season in accordance with Constructors Championship standings, and rules as specified by the FIA. Minimum 16 races must take place for bets to stand.

All drivers who start the formation lap are deemed as runners. The podium positions will be used to determine 1st, 2nd and 3rd for betting purposes. Official qualifying times as recorded by the FIA will be used for settlement. For Fastest Qualifier, times recorded in the third phase count. If for some reason the third phase does not take place we will settle on the official grid as formed by the FIA.

Episode 51 Part 1: Intro to GNU Radio (Part One) from the DCC

However, qualifying time penalties (as specified by the FIA) will. Drivers must start the first phase of qualifying for bets to stand. For fastest in qualifying session 1 and 2, drivers must start the specified phase of qualifying for bets to stand. The result for settlement is at the time of the podium presentation. If both drivers fail to complete the race then the driver completing the most laps will be deemed the winner.

If both drivers retire on the same lap then bets will be settled on the official classification at the time of podium presentation. All cars will be deemed as runners. A Safety Car Period is defined as the need for the Safety Car to run in front of the leading car during a specified race.

Should the race start under the Safety Car, then all bets concerning the Safety Car market will be settled as Yes. If the race finishes under Safety Car conditions but the safety car has not had time to get to the front of the leading car this market will be settled as Yes. Virtual Safety Car periods do not count. The winner is the driver achieving the highest placing at the time of the podium presentation.

If all drivers in the group fail to be classified then the driver completing the most laps will be deemed the winner. If all drivers in the group fail to be classified and two or more drivers retired on the same lap then dead-heat rules apply. Drivers are grouped together for betting purposes only. Bets will be settled on the official FIA result at the time of the podium presentation.

Driver must start 1st formation lap. Bet settlement will be determined by which lap number a car retires on. Should more than one car retire on the same lap then dead-heat rules apply. Settlement will be based on official FIA results. Bets will have action once the 1st formation lap starts.