"MATLAB/Simulink数字带通传输系统建模与仿真及误差分析"

理解， making the abstract content more intuitive. According to the performance of different communication systems, two important performance indicators - effectiveness and reliability are considered. Through Simulink simulation, different encoding and decoding methods are analyzed. The simulation models of analog/digital modulation technology, digital pulse coding modulation technology, and digital baseband coding technology are introduced and analyzed. The general steps and implementation methods of visual modeling and dynamic simulation of communication systems using SIMULINK in MATLAB environment are introduced, and examples and simulation results are provided. Modern communication systems require long communication distances, large communication capacity, and good transmission quality. Modulation and demodulation technology, as one of its key technologies, has always been an important direction of research. This paper uses MATLAB software platform to design and simulate the digital modulation and demodulation system with Simulink, and conduct error analysis. Keywords: Matlab, Simulink, communication principle.