Generate two waveforms-analog waveform, MATLAB Programming

The purpose of this lab is to introduce students to the basic concept of overtones. In order to generate two tones at the same time, you need to generate two waveforms and add them together using the following equation:

W(t) = A0 + A1 sin(2πf1 t + θ1)  +  A2 sin(2πf2 t + θ2)

Where W is the pulse width at time t, f1and f2 are the angular frequencies of the tones, and theta1 and theta2 are the phases.  The amplitudes A0, A1, A2 must be chosen by you so that the pulse width stays positive and is not greater than the sampling period.

PWM can be used to represent any analog waveform. At a uniform time interval the signal can be sampled and translated into a digital form representing its corresponding analog value. The faster the sampling rate, the smoother the reconstructed analog waveform will be. The sampling rate is expected to be much higher than the highest frequency of the sinusoidal waveform that you will produce, in order to generate a smoother waveform. The Nyquist sampling theory states that the sampling frequency should be at least twice the maximum frequency of the signal.

The PWM signal is simply a square wave with a variable duty cycle. The duty cycle of the square wave is proportional to the sampled value of the analog waveform as illustrated in Figure 2 for a sinusoidal analog waveform. Duty cycle is the fraction of time that a PWM signal is active in one sampling period.

 

Posted Date: 3/12/2013 6:20:44 AM | Location : United States







Related Discussions:- Generate two waveforms-analog waveform, Assignment Help, Ask Question on Generate two waveforms-analog waveform, Get Answer, Expert's Help, Generate two waveforms-analog waveform Discussions

Write discussion on Generate two waveforms-analog waveform
Your posts are moderated
Related Questions
RECOGNIZER and TRANSLATOR: i want to recognized devanagari word using matlab. I have done it using template matching. but i am not get devanagari word at the output. But get speci

In the manufacturing of ball bearings, the components, such as the ball, are hardened through a process of heating and then rapid cooling or "quenching" by submersion in an oil or

how to implement 3 out of 4 visual cryptography?

Hello sir, I am Bharat Prajapati.I am working on Copy-move forgery detection using 2D-DWT transform.How to code in matlab to detect copy-move forgery in the given image.Please help

Calling an User-Defined Function from Script: Now, we will change our script which prompts the user for the radius and computes the area of a circle, to call our function cal


Relational Expressions: The Conditions in if statements use expressions which are theoretically, or logically, either true or false. These expressions are termed as relational

How can I separate a row vector into groups.

ACTIVITIES OF A PROJECT 1-2 1-3 1-4 1-5 2-6 3-6 3-7 4-7 5-7 7-6 6-8 7-8 THE COMMPANY LOSES 2,000 FOR EVERY WEEK THE PROJECT LASTS BEYOND 30 WEEKS. fOR EACH OF THE PROPOSALS; ACTIVI

Create a custom chi-square function in matlab, MATLAB in Statisticsn..