By Michael Weeks
Textual content isn't really really thourough or rigorous. Introduces a few options like FFT with no explaining them absolutely, leaving that for later sections. If procuring for a category you have not a lot selection, if deciding to buy for reference or own learn i might glance in other places.
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Extra info for Digital Signal Processing using MATLAB and Wavelets
This does not follow from such a simple example, but more complicated transforms (such as the discrete cosine transform) have been used effectively to allow a compression program to automatically alter the signal to store it in a compact manner. Sometimes transforms are performed because things are easier to do in the transformed domain. For example, suppose you wanted to find the number of years between the movies Star Wars (copyright MCMLXXVII) and Star Wars: Episode II—Attack of the Clones (copyright MMII).
1 shows a 2D “vector” r units long, rotated at an angle of θ. 1: An example vector. ” Introduction 7 To convert from polar coordinates to complex Cartesian ones : x = r cos(θ) y = r sin(θ). The MATLAB r function below converts polar coordinates to complex coordinates. MATLAB will be explained in Chapter 2, “MATLAB,” but anyone with some programming experience should be able to get the idea of the code below. *sin(angles); To convert from Cartesian coordinates to polar ones: r = |x + jy| = x2 + y 2 θ = arctan(y/x).
1, but it is also easy to give a variable several values at once, making it a vector, or even a matrix. For example, c=[1 2] stores both numbers in variable c. To make a matrix, use a semicolon (“;”) to separate the rows, such as: d=[1 2; 3 4; 5 6]. This makes d a matrix of 3 rows and 2 columns. , d(2,2) returns the value 4. >> d=[1 2; 3 4; 5 6] d = 34 DSP Using MATLAB and Wavelets 1 3 5 2 4 6 What if you want to add another row onto d? This is easy, just give it a value: d(4,:)=[7 8]. Notice the colon “:” in the place of the column specifier.
Digital Signal Processing using MATLAB and Wavelets by Michael Weeks