iiinova — where your digital self keeps evolving

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Daniel Estévez @destevez.net · 15/06/2026

New blog post: Tianwen-2 low data rate telemetry. This is a short post where I analyze a recording of low rate (4 kbaud) telemetry done on June 8 during Tianwen-2's arrival to asteroid Kamo'oalewa. destevez.net/2026/06/tian...

A screenshot of a GNU Radio GUI showing the spectrum and constellation of the signal.

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Daniel Estévez @destevez.net · 25/10/2025

New blog post: Non-coherent m-FSK BER. Another short post in which I derive the following formula for the symbol error rate of non-coherent m-FSK and validate it using simulations. destevez.net/2025/10/non-...

A formula of the symbol error rate for m-FSK. It is a summation with m - 1 terms that contains a binomial coefficient and an exponential term that depends on the Es/N0.

A plot showing the BER versus Eb/N0 of m-FSK for m=2,4,8,16,32. The results using the closed-form formula and simulations are compared.

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derekkozel.com @derekkozel.com · 18/10/2025

Yes. I enjoyed the way I was taught HDL and think it would make a great basis for a puzzle solving game.

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Catherine @whitequark.org · 18/10/2025

if i published a game on steam that consisted of a "code editor and HDL toolchain behind it (simply works)" & the objective is "implement logic in a real HDL without handrails but with debugger and tutorials" and there is a progression, leaderboard, and achievements would you play or playtest it?

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Andrey @spirit.re · 29/09/2025

Have you ever wanted to see a 90 second abridged explanation of how diode lasers work? Here it is. I took some pictures of a laser under my SEM, and it kind of just scope crept into a whole video. Not perfectly accurate, but it's hard to squeeze 100 books of info into 90 seconds.

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Radiotelescoop Dwingeloo @radiotelescoop.bsky.social · 29/09/2025

Knap mistig in Dwingeloo! Foto: Arno Schoenmakers.

Radiotelescoop Dwingeloo in de mist, met een zon die door de mist heen schijnt.

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derekkozel.com @derekkozel.com · 27/09/2025

The basket expiration time was shorter than the time it was taking to load the next page... painful. We had two tickets and a campervan in the basket and couldn't submit our account information before it expired!

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AMSAT-DL @amsat-dl.org · 06/09/2025

💥Greater (partial) success for #amateurradio and #amsat satellite operators in dispute with AST Spacemobile over commercial use of the 430-440 MHz amateur radio band for TT&C! 💥 In its reference Attachment to the recent grant, dated August 29, 2025, the FCC imposes clear limits ⬇️

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dr lee cyborg @leeborg.bsky.social · 14/08/2025

Ok let me rephrase this. Games (or puzzles) that use (or misuse) pointers (or other things I don't understand ) as a mechanic.

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derekkozel.com @derekkozel.com · 14/08/2025

One of the best homeworks I was ever assigned is the CMU Bomb lab. You would need to compile and set it up, but the source code has been leaked. Don't peak inside the bomb itself, spoilers! github.com/kiliczsh/cmu...

github.com

GitHub - kiliczsh/cmu-binary-bomb: Carnegie Mellon University Bomb Lab

Carnegie Mellon University Bomb Lab. Contribute to kiliczsh/cmu-binary-bomb development by creating an account on GitHub.

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derekkozel.com @derekkozel.com · 30/07/2025

The Australian GNU Radio Days event is running September 23-26 in Adelaide, hosted by Flinders University. Three days of talks and workshops followed by breakouts. Still a little time to submit a talk or booth if you're interested! events.gnuradio.org/event/27/

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derekkozel.com @derekkozel.com · 26/07/2025

GNU Radio is looking for a contractor to either port the existing Qt based GNU Radio Companion application to the web (running proof of concept exists), or to develop a new frontend capable of creating flowgraphs, executing the resulting program, and displaying the UI in the web. Could that be you?

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Electromagnetic Field @emfcamp.bsky.social · 20/07/2025

We are finally ready to announce that EMF 2026 will happen on July 16-19, 2026, at Eastnor Castle Deer Park, Herefordshire. Expect more updates soon as we start spinning up the organisation again.

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derekkozel.com @derekkozel.com · 04/07/2025

@angadh.com I really like the formatting of your blog. The typography, suggested soundtracks, clear links, and organizations work well together. I'm enjoying the variety of topics as well. Thanks for sharing your writing!

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Great Scott Gadgets @greatscottgadgets.bsky.social · 24/06/2025

Meet HackRF Pro! HackRF Pro is a Software Defined Radio peripheral capable of transmission or reception of radio signals from 100 kHz to 6 GHz. You can read more about HackRF Pro and preorder it now from select resellers here: greatscottgadgets.com/hackrf/pro/

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Harry Stranger @spacefromspace.com · 17/06/2025

A new image of the International Space Station from another satellite captured by heospace.com 2025-06-14 21:28:56 UTC. The picture has a resolution of 18cm from a distance of 85.77km.

A black and white image of the International Space Station captured via a satellite by heospace.com 2025-06-14 21:28:56 UTC.

The picture has a resolution of 18cm from a distance of 85.77km.

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hforsten @hforsten.com · 01/06/2025

Found motivation to write some SAR processing code. Fast factorized backprojection generates several small polar format images and then interpolates them to one big image. It's faster, but has slightly worse image quality due to all the interpolations.

Global backprojection vs fast factorized backprojection image quality. The biggest difference is larger sidelobes on the brightest target in the FFBP image.

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derekkozel.com @derekkozel.com · 12/05/2025

Your blog posts are always great reads. Would you consider writing one on measuring these references and calculating the coefficients? Claudio's site is a good reference on coefficient calculation and it would be interesting to see your take on it.

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handle.invalid @handle.invalid · 17/03/2025

GRCon25 Call for Participation is open! Please submit your abstracts for presentations, papers, workshops - all the information available at gnuradio.org/grcon25

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hforsten @hforsten.com · 08/03/2025

I added a sideways looking GoPro camera to my radar drone. Just tested it the first time and it looks very nice.

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Daniel Estévez @destevez.net · 05/03/2025

New blog post: BGM-1 Doppler during the lunar landing. Some quick plots of the Doppler of @firefly-aerospace.bsky.social's lander as received by the @amsat-dl.org and @radiotelescoop.bsky.social groundstations.

A plot of the Doppler curve of the S-band telemetry as observed by Bochum and Dwingeloo. We can see a part of one orbit, all the powered descent, and the manoeuvres for landing.

A zoom to a region of a few minutes around the touchdown. The Doppler increases smoothly until becoming almost constant. This is typical of a smooth vertical deceleration that finishes with ground contact.

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KiCad EDA @kicad.org · 20/02/2025

KiCad Version 9.0.0 Release The KiCad project is proud to announce the latest major version release. See the blog post on the KiCad website for more information about this release. www.kicad.org/blog/2025/02...

kicad.org

Version 9.0.0 Released

The KiCad project is proud to announce the release of the next major version of KiCad. Version 9 is packed with new features, improvements, and hundreds of bug fixes. We hope you enjoy the new versio...

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hforsten @hforsten.com · 24/11/2024

Hello Bluesky! Follow for homemade radars, RF electronics, FPGAs, programming, and other electronics related things.

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Hackster.io @hacksterio.bsky.social · 10/02/2025

Sylvain Munaut has created a basic software-defined radio the hard way — by combining two open-silicon projects submitted for production on two Tiny Tapeout shuttle runs: an analog-to-digital converter and a radio-frequency mixer.

hackster.io

Sylvain Munaut Combines Two Tiny Tapeout Projects to Create an Open-Silicon Software-Defined Radio

While the resulting SDR won't be winning any awards for performance or features, it's a great example of Tiny Tapeout's flexibility.

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Daniel Estévez @destevez.net · 08/02/2025

The recording for my #FOSDEM talk "Yet another new SDR runtime?" is now up. In this talk I speak about high-performance SDR runtimes in embedded systems, and present an experimental runtime I have been writing in Rust.

The title slide for the talk "Yet another new SDR runtime?"

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derekkozel.com @derekkozel.com · 30/01/2025

I'm headed to #FOSDEM this weekend! @gnuradio.bsky.social has a booth and there's a Radio devroom on Saturday.

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Goonhilly @goonhilly.org · 27/01/2025

Hello Bluesky! 📡 We're Goonhilly and we're a space technology company offering secure and reliable communication solutions from our sites in the UK and USA! We can't wait to keep you updated on our work across our three divisions: - Lunar & Deep Space Comms - Commercial Satcom - Defence & Security

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derekkozel.com @derekkozel.com · 23/01/2025

We usually have an SDR/Radio meetup and dinner. I'm not sure if that's been planned again, but if you're interested can find out.

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Guy Dupont @guydupont.bsky.social · 22/01/2025

Playing with the idea of "different perspectives on the same story"! QR code that sends you to a different source based on the angle.

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Daniel Estévez @destevez.net · 14/01/2025

New blog post: Decoding IEEE 802.11ah. Here I analyze a recording of a baby monitor camera, which happens to use 2 MHz BW WiFi HaLow at 866 MHz. Similarly to my LTE and 5G posts, I write a Jupyter notebook to decode the signal from scratch, and write the MAC frames to PCAP.

A waterfall of the IQ recording showing two packets from different transmitters. The modulation is OFDM, and preambles causing spectral lines can be seen at the beginning of the packets, and also a few symbols after the start of the first packet.

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Julien Gachadoat @julienv3ga.bsky.social · 06/01/2025

It took me a while but I finally finished to recode the 300 programs of Jean-Paul Delahaye’s book "Nouveaux dessins géométriques et artistiques" with p5js. The book was published in 1985 and features classic generative algorithms. github.com/v3ga/nouveau...

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The Long Now Foundation @longnow.org · 25/11/2024

We are thrilled to announce Pace Layers, a new annual journal of long-term thinking. Our first issue is a 282-page compendium of ideas, art, and insights on what we call the pace layers of our planet: fashion, commerce, infrastructure, governance, culture, and nature. longnow.org/ideas/pace-l...

longnow.org

Announcing Pace Layers

The inaugural issue of Long Now’s new annual print journal synthesizes the most important learnings of our first quarter-century.

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Scott Tilley @coastal8049.bsky.social · 30/12/2024

Closing in on the final stages of automating the X-band sensor. Here's the plot outputted by the automated sensor alignment code prior to alignment. The code scans an emitter with a known location (here TIANWEN-1 around Mars) plots it and then when commanded will correct the mount's aim. 🧵⬇️

Automating the synchronization of the X-band sensor to emitters at known celestial locations. Here I'm using China's TIANWEN-1 Mars orbiter to act as that emitter. Using the known position of Mars I'm able to synchronize the radio telescope's aim to ensure other objects of unknown location are accurately aimed at and their positions can be relatively accurately obtained.

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derekkozel.com @derekkozel.com · 29/12/2024

Ack! Just left the venue due to uninteresting music in the lounge. That sounds like it would be great.

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derekkozel.com @derekkozel.com · 26/12/2024

I'm on my way from London to Hamburg for #38C3. Looking to meet people so let me know if you're there! I have GNU Radio stickers too. I'll be on phone extension 6408 from tomorrow.

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arturo182 @arturo182.bsky.social · 22/12/2024

I've made a feed that shows skeets and replies containing #38C3 because it's easier to pin a feed than to search for a hashtag. bsky.app/profile/artu...

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f5oeo.bsky.social @f5oeo.bsky.social · 18/12/2024

Proof of concept for sweepfft (480Mhz span) using plutosdr and modified maia-sdr hdl design. Still some work to do for interface, but hope a good start.

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derekkozel.com @derekkozel.com · 17/12/2024

I'm coming for my first time.

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derekkozel.com @derekkozel.com · 12/12/2024

I'll get it in mid-July! The job hunt starts for real in January.

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derekkozel.com @derekkozel.com · 12/12/2024

That module hasn't been updated in 6 years and supports Python 2 and GNU Radio 3.7 only. There's a slightly newer one which claims to work on Python 3 and GR 3.8. If there's a bug I'd say it's that the module needs an hour or two of updating and testing. github.com/Arribas/gr-A...

github.com

GitHub - Arribas/gr-APRS at gr3.8

GNU Radio Hierarchial Block(s) to Test and Receive APRS Packet - GitHub - Arribas/gr-APRS at gr3.8

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derekkozel.com @derekkozel.com · 23/11/2024

I'm tremendously pleased to share that I successfully defended my thesis on the design of Advanced Load Modulated Power Amplifiers for Wireless Communications yesterday!

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