![Figure 3: A semilog plot on y for x and 10^x.](https://www.wavewalkerdsp.com/wp-content/uploads/2022/08/ExplainingLogarithmsExponentsAndBaseNumbersWithPlots_semilog10-150x150.png)
![](https://www.wavewalkerdsp.com/wp-content/uploads/2022/07/math-150x150.png)
Easy Guide to Logarithms and Decibels
July 20, 2022
![Figure 2: The magnitude-squared of the boxcar window frequency response.](https://www.wavewalkerdsp.com/wp-content/uploads/2022/05/FourierTransformOfTheBoxcarWindow_frequencyResponseMag-150x150.png)
Fourier Transform of the Boxcar Window
July 13, 2022
![](https://www.wavewalkerdsp.com/wp-content/uploads/2022/04/trigIdentities-150x150.png)
![Figure 3: The complex sinusoid e(j2 pi (2/4) n) only contains energy at X[2].](https://www.wavewalkerdsp.com/wp-content/uploads/2022/01/DFTFrequencyResolutionExplained_4DFT_Freq2-150x150.png)
DFT Frequency Resolution Explained
March 16, 2022
![](https://www.wavewalkerdsp.com/wp-content/uploads/2022/03/Sinx2Cosx2Derivation-150x150.png)
Trigonometric Identity: sin(x)^2 + cos(x)^2 = 1
March 9, 2022
![Figure 4: The impulse response and frequency response of the LPF before the FIR filter gain is normalized.](https://www.wavewalkerdsp.com/wp-content/uploads/2021/12/DesigningFIRFilterGain_unnormBPFResponses-150x150.png)
Designing FIR Filter Gain
February 23, 2022
![Figure 6: The magnitude of the cross correlation between c[n] and y[n], |Ryc[tau]|.](https://www.wavewalkerdsp.com/wp-content/uploads/2021/12/CrossCorrelationExplainingTimeLags_barkerCrossCorrAbsNoisy-150x150.png)
Cross Correlation: Explaining Time Lags
January 12, 2022
![](https://www.wavewalkerdsp.com/wp-content/uploads/2021/12/FourierTransformLinearityPropertyDerivation-150x150.png)
Fourier Transform Linearity Property Derivation
January 5, 2022
![](https://www.wavewalkerdsp.com/wp-content/uploads/2021/11/fourierTransformExplained-150x150.png)
Fourier Transform Explanation as a Cross-Correlation
December 22, 2021