Wave Walker DSP

DSP Algorithms for RF Systems

DSP: Explaining Why

Energy equation for a discrete-time signal.

Power and Energy in Discrete-Time Signals

December 1, 2023

Figure 2: The periodicity of a complex sinusoid can be seen easier in three dimensions.

Why Does the DFT Need Windowing Functions?

September 1, 2023

Reducing the gain avoids ADC saturation. The dynamic range is improved and the signal can be seen.

ADC Saturation: Why More Gain Isn’t Always Better

May 18, 2022

Derivative of Sine and Cosine Using Euler’s Formula

April 6, 2022

The Brand New Wave Walker DSP eBook!

March 21, 2022

Figure 3: The complex sinusoid e(j2 pi (2/4) n) only contains energy at X[2].

DFT Frequency Resolution Explained

March 16, 2022

Can the Fourier Transform Magnitude Be Negative?

February 16, 2022

A radio receiver acts like an assembly line. Samples are held in a tapped delay line, operated on, and then passed along to the next operation.

Minimizing Filter Length: Explaining Why

February 9, 2022

Why are filters used in DSP? To combine, or synthesize, multiple signals into one.

Why are Filters used in DSP?

January 26, 2022

Figure 5: The impulse response of an odd length SRRC allows for optimal sampling by being able to select the peak at n=0. An even length SRRC filter does not.

Why an FIR Filter Should Have an Odd Length

December 29, 2021

God, the Lord, is my strength; he makes my feet like the deer’s; he makes me tread on my high places. Habakkuk 3:19

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