Simulation of RZ, NRZ, QAM, FSK Modulation and Bit Error Rate Curves

In this article, we will provide a detailed discussion on simulating various modulation techniques including RZ (Return-to-Zero), NRZ (Non-Return-to-Zero), QAM (Quadrature Amplitude Modulation), FSK (Frequency Shift Keying), and their corresponding bit error rate curves. First, we will introduce the fundamental principles and characteristics of each modulation technique, providing code-level implementation approaches for waveform generation and signal processing. Subsequently, we will delve into key parameters and algorithms used in the simulation process, explaining how to implement modulation/demodulation algorithms and BER calculation methods using programming techniques. Additionally, we will compare different modulation techniques and discuss their respective advantages and disadvantages, including performance analysis through MATLAB or Python simulation code. Finally, we will present practical application cases with executable code examples to help readers better understand the application and significance of these simulation techniques in real-world communication systems.