# Find Fourier Series Coefficients

1. Jul 29, 2008

### rajtomar219

1. Find Fourier Series Coefficient for a signal. (alternanate sawtooth pulse from t= -3 to 3 amplitude 1 on positivwe side and-1 on negative side. 3 pulse on positive side. 3 pulse on negative side. pulse width is 1.) as given in attachment file.

2. Compute the fourier series coefficients a[/k], b[/k], and x[k]. Simplify for odd K aand even K.

3. Compute the signal Power in the fundamental component.

4. Compute the signal Power upto the fourth harmonic.

5. Compute the total signal Power.
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

#### Attached Files:

• ###### signal.GIF
File size:
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2. Jul 29, 2008

### Redbelly98

Staff Emeritus
There is an equation for calculating Fourier series coefficients. You should be able to find it in either your text book or class notes.

3. Jul 30, 2008

### rajtomar219

i am weak student so im not able to find out so plese help

4. Jul 30, 2008

### Redbelly98

Staff Emeritus
The equation will be near the beginning of wherever your textbook first begins discussing Fourier series. It involves doing an integral -- if f(t) is the signal, look for something sort of like this in the equation:

$$\int f(t) \cdot \sin(\frac{2 \pi}{T}t) \ dt$$

or a similar expression with cos instead of sin.

5. Jul 30, 2008

### Defennder

Just scan the book for the terms "fourier series coefficients".

6. Nov 16, 2008

### kmw288

Thanks for the great explanation... On where it might be in a textbook. ***

7. Nov 21, 2008

### JANm

For a start what is the constant fourier coefficient: what is the mean value of the function?