Finding Fourier Series Coefficients

In summary, the task is to find the Fourier series coefficients X_k of the periodic signal x(t) = 5cos(6w_0t+pi/2), with a focus on digital or discrete spectrum. The speaker is unfamiliar with the 3 coefficients, the representation of the Fourier series, and shortcuts that may aid in the calculation process. They were only given an integral equation and a summation for discrete signals.
  • #1
Pete_01
51
0

Homework Statement


Find the Fourier series coefficients X_k of the periodic signal:
x(t) = 5cos(6w_0t+pi/2)
(digital or discrete spectrum)


Homework Equations





The Attempt at a Solution



I am really confused with all of this and don't even know how to start.
 
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  • #2
What do you mean by "digital or discrete spectrum" ? The '(t)' in x(t) designates a continuous time dependent signal.

Anyway, are you familiar with the 3 co-efficients (a0, an, & bn), the way the Fourier series will be represented after you find them, how to calculate each one, and any shortcuts (like an odd or even function) that may hasten the process?
 
  • #3
Zryn said:
What do you mean by "digital or discrete spectrum" ? The '(t)' in x(t) designates a continuous time dependent signal.

Anyway, are you familiar with the 3 co-efficients (a0, an, & bn), the way the Fourier series will be represented after you find them, how to calculate each one, and any shortcuts (like an odd or even function) that may hasten the process?

I am not familiar with the 3 coefficients. The book did not cover this. I was only give an integral equation and a summation (for discrete signals).
 

1. What is a Fourier Series?

A Fourier Series is a mathematical representation of a periodic function as a sum of sine and cosine functions. It can be used to describe a wide range of periodic phenomena, such as sound, light, and electrical signals.

2. Why is it important to find Fourier Series coefficients?

Finding Fourier Series coefficients allows us to accurately represent a periodic function and analyze its properties. It also allows us to approximate non-periodic functions by using a finite sum of Fourier Series terms.

3. How do you calculate Fourier Series coefficients?

There are various methods for calculating Fourier Series coefficients, such as the Euler-Fourier formula, the complex form of Fourier Series, and the trigonometric form of Fourier Series. Each method involves integrating the given function over one period and solving for the coefficients.

4. What are the applications of Fourier Series?

Fourier Series has many applications in science, engineering, and mathematics. It is used in signal processing, image analysis, data compression, and solving differential equations. It is also used to study the behavior of waves, vibrations, and other periodic phenomena.

5. Can Fourier Series be used for non-periodic functions?

Yes, Fourier Series can be used to approximate non-periodic functions by using a finite number of terms. However, the accuracy of the approximation depends on the smoothness of the function and the number of terms used.

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