![Average power for a signal](https://www.wavewalkerdsp.com/wp-content/uploads/2024/06/averagePower-150x150.png)
Calculate Average Signal Power
June 1, 2024
![Equation for the power spectral density.](https://www.wavewalkerdsp.com/wp-content/uploads/2024/02/WhatIsPSD-150x150.png)
What is Power Spectral Density (PSD)?
February 1, 2024
![Energy equation for a discrete-time signal.](https://www.wavewalkerdsp.com/wp-content/uploads/2023/05/energy_equation-150x150.png)
Power and Energy in Discrete-Time Signals
December 1, 2023
![Figure 4: The discrete Fourier transform (DFT) of a complex sinusoid with frequency 0.57pi (zoom view).](https://www.wavewalkerdsp.com/wp-content/uploads/2023/05/DiscreteFourierTransformOfComplexSinusoid_reponse2_zoom-150x150.png)
![Figure 3: Increasing the delay M increases the number of teeth in the comb filter and reduces their width. Note that the magnitude has been normalized to 0 dB gain at omega=0.](https://www.wavewalkerdsp.com/wp-content/uploads/2023/03/CombFilterIntroductionAndAnalysis_delay4-1-150x150.png)
Comb Filter Introduction and Analysis
March 1, 2023
![Figure 1: Magnitude of the frequency response for the band pass single pole IIR filter.](https://www.wavewalkerdsp.com/wp-content/uploads/2022/08/BandPassSinglePoleIIRFilterDesign_magnitude-150x150.png)
Band Pass Single Pole IIR Filter Design
February 1, 2023
![Figure 2: Complex frequency shifting can result in aliasing if the frequency response overlaps the half sampling rate.](https://www.wavewalkerdsp.com/wp-content/uploads/2022/08/ComplexFrequencyShiftWithAliasing-150x150.png)
Complex Frequency Shifting in Discrete Time
January 1, 2023
![Figure 1: Complex frequency shifting in the frequency domain.](https://www.wavewalkerdsp.com/wp-content/uploads/2022/08/FrequencyShiftingFrequencyDomain-150x150.png)
Complex Frequency Shifting in Continuous Time
December 1, 2022
![Figure 1: The frequency response of the ideal low pass filter (LPF) for omega c = 1/8.](https://www.wavewalkerdsp.com/wp-content/uploads/2022/07/DerivingTheIdealLowPassFilterLPF_frequencyResponse-1-150x150.png)
Deriving the Ideal Low Pass Filter (LPF)
October 1, 2022
![Figure 3: Comparing a moving average filter N=8 with the single pole IIR filter approximation.](https://www.wavewalkerdsp.com/wp-content/uploads/2022/06/SinglePoleIIRFilterGreatSubstituteForAMovingAverageFilter_frequencyResponseComparison-150x150.png)
Single Pole IIR Filter: Substitute for Moving Average Filter
August 10, 2022