Design of a Wireless Transmission Signal Simulation System Based on STM32 Microcontroller

With the development of wireless communication technology, issues such as multipath effects and signal attenuation have significantly impacted system performance. Addressing the limitations of existing signal simulation systems, including high cost, low flexibility, and difficulty in precise parameter control, this study proposes a low-cost and scalable wireless signal simulation system based on the STM32F407 microcontroller. The system can simulate direct and multipath signals, covering carrier frequencies from 30 MHz to 40 MHz, and generate continuous wave and amplitude-modulated signals. By precisely controlling amplitude, delay, and phase, the system meets the requirements of diverse wireless transmission scenarios. Its innovative approach to multipath channel simulation and signal adjustment provides a low-cost, highly flexible, and portable solution suitable for wireless communication research, laboratory testing, and equipment performance evaluation.