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
Tag: hamr
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
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
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
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
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
Next Generation SDR Interference Reduction
Next generation SDR interference reduction should be tackled by Spatial Interference Filtering Techniques. Here is why and how. Read more
Modulation Dependent Carrier Level Methods
Today’s AM broadcasters reduce carrier level to save money on their power bills. Here is a summary of the modulation dependent carrier level methods. Read more
Implement Synchronous Detection – How It’s Done
So, how do you implement synchronous detection? Lots of ways, it turns out. Some work better than others across a spectrum of complexity. Read more
Understanding Synchronous Detection
To boost your understanding synchronous detection, let’s examine the impact of selective fading, distortion and weak signals on the AM detector in your receiver. Read more