principal of communication post lab task 10

1. Principle of Communication Lab Manual EEE351
1 CIIT Attock Campus
Lab 10: Amplitude Shift keying
Objective
Implementation of amplitude shift keying in LabVIEW
Introduction
This step-by-step demo is designed to examine the Amplitude Shift Keying (ASK) digital modulation
scheme. Fundamentally, digital modulation requires changing characteristics of the carrier wave over
time. Each change results in a sine wave with a different phase, amplitude, or frequency than before. As
a result, different “states” of the sine wave are referred to as symbols which represent some digital bit
pattern. In this exercise, we will construct a LabVIEW VI that transmits and receives a digital bit stream in
software using ASK.
Below is a plot that shows the transmitted signal for 8-ASK. Here the amplitude level of the carrier signal
represents 3-bits of digital data. Zero amplitude represents 000, and the highest amplitude represents
111. The other levels are at intervals between.
Lab Tasks
Objective:
Overview:

2. Principle of Communication Lab Manual EEE351
2 CIIT Attock Campus
In-Lab Task 1:
Implement On/Off shift keying using LabVIEW Carrier frequency of 2 MHz
Block diagram:
Front panel:

3. Principle of Communication Lab Manual EEE351
3 CIIT Attock Campus
Post-Lab Task 1: Implement ASK in Math script node.
CODE:
WAVEFORM:
Result and Discussions:

4. Principle of Communication Lab Manual EEE351
4 CIIT Attock Campus