数字通信系统中的调制技术研究与仿真: MATLAB实现与性能分析

Communication is an indispensable method for people to exchange information in daily life. With the rapid development of digital systems, the requirements for the performance and modulation-demodulation technology of digital systems are becoming higher and higher. At the same time, with the advancement of computing technology, communication system simulation has become increasingly common and has gradually become the main tool for designing and analyzing communication systems today. In this study, MATLAB software will be used to design functions and simulate digital modulation technology with Simulink modeling. The first chapter introduces the composition of communication systems, the use of MATLAB, and the construction of Simulink modules. The second chapter analyzes in depth the theoretical knowledge of modulation and demodulation principles of 2ASK, 2PSK, and 2FSK. After familiarizing oneself with the principles, the third chapter uses MATLAB programming and Simulink to simulate and study them. This design mainly implements simulations of the modulation and demodulation processes of 2ASK, 2PSK, and 2FSK, and analyzes their performance differences. The final chapter provides a summary of digital modulation and demodulation. In conclusion, the research and simulation of digital modulation technology in communication systems using MATLAB and Simulink play a crucial role in understanding the principles, performance, and differences of various modulation techniques. This study contributes to the enhancement of communication system design and analysis and provides valuable insights into digital modulation and demodulation processes.