Next generation SDR interference reduction should be tackled by Spatial Interference Filtering Techniques. Here is why and how. Read more
Series: Spatial Interference Filtering Techniques
Use spatial filtering to reduce interference, especially from local RFI. I am calling this project SIFT.
Understanding Beamforming – Proven for Decades
Understanding beamforming is actually quite simple. It used to be about analog delay lines. Now it’s just a matter of complex math in your computer. Read more
Beamforming Everywhere – You’ll Be Surprised
Amazingly, you will find spatial filtering or beamforming everywhere. It’s used for wireless phones and networks, meeting rooms and even ultrasound. Read more
More About Beamforming – Questions and Answers
Let’s learn more about beamforming. We dig into some of the key assumptions and terminology, including the difference between time delay and phase shift. Read more
Ham Radio Beamforming with Phased Arrays
Antenna phasing is used for ham radio beamforming and shortwave listening, especially on the lower bands where conventional beams are not feasible. Read more
Narrowband Digital Beamforming – A Spatial Filter
Read this article to learn how to do narrowband digital beamforming in software defined radio. In my opinion, it’s the next big thing for hams and shortwave listeners. Read more
Dual Coherent SDR Receivers – Current State
This article describes the current state of hardware and software solutions for coherent SDR receivers within reach of hams and hobbyists. Take a look. Read more
Implementing a DSP Noise Canceller
A DSP Noise Canceller is easily the most useful Spatial Interference Filtering Technique for hams and shortwave listeners. Here’s how its done. Read more
SDR Spatial Filtering Demo – Watch It Work
This GNURadio SDR spatial filtering demo shows how you can eliminate local RF interference using coherent sampling on two radio channels with different antennas. Read more
About VITA 49 – Discovering Radio Transport Protocol
Why should you care about VITA 49? I may just be the next big thing in software defined radio. Here is a gentle introduction. Read more
Digital Phasing Reduces Radio Frequency Interference
Watch digital phasing reduce local noise and interference using Spatial Interference Filtering Techniques. It really works! Read more
Beamforming Comparison – Analog versus Digital
My experimental beamforming comparison shows that both analog and digital approaches work well and provide roughly the same results. See my video. Read more
SdrDx Spatial Filtering with Afedri Receiver
I finally got around to SdrDx spatial filtering. The phasing control in SdrDx software works really well with my Afedri AFE822x. Read more