Daniel Estévez

Since the end of August I have been working on a new ADS-B receiver application that is intended to outperform existing open source receivers in scenarios with weak signals or message collisions.

The Nancy Grace Roman Space Telescope is a NASA space telescope that carries a wide field instrument with a 300.8 megapixel visible and near-infrared sensor that provides a sensitivity comparable to Hubble with a field of view 100 times larger, and a coro…

If \(\{x_k\}_{k=0}^{N-1}\) is a complex waveform and this waveform is received in AWGN, that is, the sequence \(y_k = A x_k + n_k\) is received, where \(A\) is an unknown complex amplitude and \(n_k\) are independent circularly symmetric normal random var…

Back in May I wrote a post explaining the architecture of AMD NPUs and demonstrating a simple kernel that reaches close to the peak TOPS allowed by the hardware resources.

On 2026-08-02, Peter Gülzow, AMSAT-DL‘s president, noticed that Tianwen-1 was transmitting very low rate telemetry, in contrast to the usual 16 kbaud telemetry.

Open Research Institute has recently published the solutions for a Lunar Descent CTF that they ran at BSides San Diego 2026.

Thomas Telkamp has shared with me an IQ recording of the Tianwen-2 telemetry downlink made with the Bochum 20 metre antenna on June 8.

A couple years ago I wrote a post about the paper Controlled-Root Formulation for Digital Phase-Locked Loops, by Stephens and Thomas.

Yesterday I posted about my decoding of some recordings of the X-band telemetry of Tianwen-2 done by the Dwingeloo radio telescope.

Tianwen-2 is a Chinese mission that will return samples from the Earth quasi-satellite asteroid 469219 Kamoʻoalewa and rendezvous with the 311P/PanSTARRS comet.

I have a Framework Laptop 13 that has a Ryzen AI 7 350 CPU that includes an NPU.