QFH Antenna and my first reception of NOAA!

So in my last post I was playing with my RTL-SDR with an Intel Edison. So I decided to build a QFH Antenna to ble able to receive NOAA APT Signals. These NOAA Weather Satellites broadcast a APT signal with about 5 to 8 Watts at 2m band, and considering how low this power is, it might suprise you that these signals arrive pretty strong at earth surface. But the biggest challenge to receive this signals are not its power. Its all about movement. These satellites are sun-synchronous low orbit satellites, that means they aren’t locked to earth rotation. Instead,...

Play with SDR and Intel Edison!

So some people already saw in my facebook that I started playing with SDRs (Software Defined Radio). I always wanted to do my own radio receiver, and I did some in the past. But it’s very hard to adapt the radio for anything new you want do to, and also when you want to process data in your computer things become harder. So a few months ago I found a nice tutorial of how to get NOAA Satellite Images using a cheap DVB-T (Digital Video Broadcast – Terrestrial) dongle that can be used as SDR. It costs about R$70 (roughly...

Um presente inesperado na Campus Party!

Only available in Portuguese

The Parallella Board and HyperSignal

I’ve got my Parallella board a few months ago (at Campus Party Brazil of 2014 to be exact). I’ve already studyied the Epiphany Processor ManyCore Architecture before, and I was excited to get one of those boards at my hand. The first thing I imagine to do, is a Matrix Upscaler Interpolator for my project HyperSignal (its offline now, but I will get it online soon and code at github) because the simple nature of a interpolation algorithm drops all the overhead of multithreading over the memory controller, that has limited number of simultaneous access and also depends on how...

Motivos pelos quais eu não gostei do Intel Galileo

Only available in Portuguese