Half Band Filter Design: Exceptional Filtering Efficiency!
Introduction The half band filter (HBF) is an incredibly efficient filtering structure when designed correctly! In this blog I will discuss how to design half
The Wisdom of Conan O’Brien
I’m particularly fond of two pieces of wisdom from Conan O’Brien.
Designing an FIR Band Pass Filter with Remez
Introduction A band pass filter is characterized by having attenuation at both high frequency and low frequency with a pass-band in between. Band-pass filters can
Designing an FIR High Pass Filter with Remez
Introduction While low-pass filtering (LPF) is ubiquitous high pass filters (HPF) can be needed depending on the RF environment or for specific algorithms. The previous
FIR Low Pass Filter Design with Remez
Introduction The focus of this blog is to describe the low pass filter design process with the remez() function, which is one of many ways
Engineering Mindset: Be a Stone Carver, not a Brick Mason
Maintaining the proper mindset is crucial to proper mental health and the longevity of your career. Many come to believe that engineering is linear and procedural, like a brick mason building a brick wall. The brick mason operates by adding more and more material; bigger is better, more expensive and more profitable.
A more effective mindset is that of the stone carver. Quality and craftsmanship are key for the stone carver. A stone carver designs one chisel stroke at a time. The stone carver removes what does not belong until the final design is revealed. For the stone carver, less is more: removing more material allows for more detail, more polish and represents an overall a higher quality piece of art.
Why are Sinusoids used in DSP and RF?
The goal of this post is to shed some light on why sinusoids are useful in DSP and RF communication.
Sinusoids are used by humans to describe the cyclical nature of the universe. They are a useful mathematical abstraction. Each year is 365 days and then a new year begins. Spring is followed by summer, fall, winter and then spring begins again. Low tide, high tide and then low tide again. A spinning ceiling fan. The rotation of the tires on your automobile. Reeling your fishing rod.
Basic Rules for Complex Numbers
The mathematics of DSP and complex numbers can be confounding.
Understanding how 
was difficult when I first started my DSP education and it’s still not something I fully grasp. When starting out in your DSP education sometimes it is enough to simply understanding how the tools and procedures are applied, rather than how they are derived.
How Euler’s Formula Relates Triangles, the Unit Circle and Complex Sinusoids
Sines and cosines are the foundation for representing signals and the affects of filters and therefore understanding their mathematics is one of the foundational tools for signal processing. Euler’s formula is a mathematically compact and useful representation used for representing complex sinusoids.
Time Invariant and Time Varying Filters
Introduction The response of time invariant filters is independent of time and have filter weights which do not change over time. Time invariance (TI) is