Amplitude Shift Keying (ASK): Digital Modulation PDF
Document Details
Uploaded by BrainyStream
Tags
Summary
This document explains Amplitude Shift Keying (ASK) in digital modulation. It covers the equation of ASK modulated signals and discusses types of ASK modulation and demodulation. Diagrams and illustrations are included to better showcase the discussed concepts.
Full Transcript
**Digital Modulation -- is the process of modulating an analog carrier with a digital information.** **Types** 1. **Amplitude Shift Keying (ASK)** -- is a form of digital modulation where the amplitude of the analog carrier is modulated by a digital (binary) signal. The equation of the am...
**Digital Modulation -- is the process of modulating an analog carrier with a digital information.** **Types** 1. **Amplitude Shift Keying (ASK)** -- is a form of digital modulation where the amplitude of the analog carrier is modulated by a digital (binary) signal. The equation of the amplitude modulated signal is, ***v(t) = \[1V+m(t)\] \[V~c~sinω~c~t\]*** where: *v(t)* = amplitude shift keying modulated signal, Volt (V) *m(t)* = binary modulating signal, Volt (V) *V~c~sinω~c~t* = analog carrier signal *V~c~* = maximum or peak amplitude of the carrier signal, Volt (V) *ω~c~* = analog carrier radian frequency signal, rad/sec = *2πf~c~* *f*~c~ = frequency of the analog carrier signal, Hertz (Hz) Chapter 11 ASK Modulator **ASK modulation**  **Analog carrier signal** C:\\Users\\63916\\Pictures\\Screenshot 2021-10-20 215942.png ***v(t) = \[ 1+ (-1)\]\[V~c~sinω~c~t\]*** ***= 0 V*** ***v(t) = \[1 + (+1)\]\[V~c~sinω~c~t\]*** ***= 2V~c~sinω~c~t V***  **Binary input (a) Modulator output (b)** **Baud Rate for ASK** **ASK demodulation/detection** **Asynchronous Demodulation** **Asynchronous Demodulator** **Synchronous Demodulation**  **Synchronous Demodulator**
