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DSP Algorithms for RF Systems

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Figure 1: Complex frequency shifting in the frequency domain.

Complex Frequency Shifting in Continuous Time

December 1, 2022

Introduction Complex frequency shifting moves the frequency response of a signal in the frequency domain. This blog describes complex frequency shifting in continuous time by

Wave Walker DSP at GRCon 2022

Wave Walker DSP at GRCon 2022!

October 19, 2022

Wave Walker DSP got a shout out at the GNU Radio Conference! Thank you Derek Kozel for the kind words! The video is queued: Wave

Figure 1: The frequency response of the ideal low pass filter (LPF) for omega c = 1/8.

Deriving the Ideal Low Pass Filter (LPF)

October 1, 2022

Introduction This blog derives the ideal low pass filter (LPF) step by step using simple math. More DSP blogs! Building a PSK and QAM Modulator

Figure 2: Upsampling by 5 is accomplished by zero-padding every sample with 4 zeros.

Introduction to Interpolation and Upsampling

September 1, 2022

Introduction Easy guide on interpolation! Describes upsampling and how to build the appropriate low pass filter. A sine wave is used for clarity but this

August 2021

One Year Anniversary!

August 24, 2022

Thank you! WaveWalkerDSP.com is officially 1 year old! A special thank you to those who have supported me along the way: My family My friends

Figure 3: Comparing a moving average filter N=8 with the single pole IIR filter approximation.

Single Pole IIR Filter: Substitute for Moving Average Filter

August 10, 2022

Introduction The single pole IIR filter is incredibly efficient and can be a great stand-in for a moving average filter! In this blog I describe

Figure 1: The cutoff frequency approximation for a moving average filter of length 5.

Bandwidth of a Moving Average Filter

August 3, 2022

Introduction This blog shows how to approximate the 3 dB cutoff frequency of the moving average filter. Check out these other blogs! Half Band Filter

Figure 3: A semilog plot on y for x and 10^x.

Explaining Logarithms, Exponents and Base Numbers With Plots

July 27, 2022

Introduction Logarithms, exponents and base numbers can be hard to think about at times. This blog visualizes these types of numbers using plots to show

Easy Guide to Logarithms and Decibels

July 20, 2022

Introduction Logarithms are confusing! This blog explains what logarithms are, how they are used, and gives two easy equations to convert between decibels and linear

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For everything there is a season, and a time for every matter under heaven. A time to cast away stones, and a time to gather stones together. A time to embrace, and a time to refrain from embracing. Ecclesiastes 3:1,5

The earth was without form and void, and darkness was over the face of the deep. And the Spirit of God was hovering over the face of the waters. Genesis 1:2

Behold, I am toward God as you are; I too was pinched off from a piece of clay. Job 33:6

Enter His gates with thanksgiving, and His courts with praise! Give thanks to Him; bless His name! Psalm 100:4

Lift up your hands to the holy place and bless the Lord! Psalm 134:2

Blessed is the man who trusts in the Lord, whose trust is the Lord. He is like a tree planted by water, that sends out its roots by the stream, and does not fear when heat comes, for its leaves remain green, and is not anxious in the year of drought, for it does not cease to bear fruit. Jeremiah 17:7-8

He said to him, “You shall love the Lord your God with all your heart and with all your soul and with all your mind. This is the great and first commandment. And a second is like it: You shall love your neighbor as yourself. On these two commandments depend all the Law and the Prophets.” Matthew 22:37-39

Then He said to me, “Prophesy over these bones, and say to them, O dry bones, hear the word of the Lord. Thus says the Lord God to these bones: Behold, I will cause breath to enter you, and you shall live." Ezekiel 37:4-5

Riches do not profit in the day of wrath, but righteousness delivers from death. Proverbs 11:4

The angel of the Lord appeared to him in a flame of fire out of the midst of a bush. He looked, and behold, the bush was burning, yet it was not consumed. And Moses said, “I will turn aside to see this great sight, why the bush is not burned.” When the Lord saw that he turned aside to see, God called to him out of the bush, “Moses, Moses!” And he said, “Here I am.” Exodus 3:2-3

Daniel answered and said: “Blessed be the name of God forever and ever, to whom belong wisdom and might. He changes times and seasons; He removes kings and sets up kings; He gives wisdom to the wise and knowledge to those who have understanding." Daniel 2:20-21

Now the Lord is the Spirit, and where the Spirit of the Lord is, there is freedom. 2 Corinthians 3:17

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