Abstract

This chapter presents a design of the quadrature amplitude modulation (QAM) transmitter and receiver in Simulink and obtains the bit error rate (BER) graphs through simulation. The block Rectangular QAM Modulator Baseband provided in Simulink takes the input of a row vector composed of log 2 M bits and outputs the two-dimensional coordinates of QAM symbols in the two-dimensional vector space. A QAM signal received through an additive white Gaussian noise (AWGN) channel can be converted into a point in the 2-D vector space. The MATLAB function berawgn() can be used to calculate the theoretical BER of various modulation and demodulation methods. The chapter then compares the BER graphs obtained through simulation with the theoretical BER, describes the conversion of the pulse-shaped QAM signal into an electrical signal, and observes the signal trajectory using an oscilloscope. It is designed to help teach and understand communication systems using a classroom-tested, active learning approach.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.