2024年电赛C题无线传输信号模拟系统江苏省第一名方案

上传者: 2301_80488214 | 上传时间: 2025-05-28 15:03:37 | 文件大小: 83.75MB | 文件类型: ZIP
整体方案概述 系统通过STM32F407ZGT6单片机,控制DDS产生四路频率、相位相对独立的信号,分别为直达与多径传输AM信号的载波和调制信号,并可以独立控制其幅值和相移;单片机DAC提供偏置信号,通过加法器和乘法器得到调幅信号;之后通过运放电路将其放大到目标要求的幅值范围,多径传输信号外加PE4302程控增益器调节额外增益,最后通过加法器合路输出 调幅波生成 使用模拟乘法器、加法器,利用独立的载波和调制信号产生调幅波,使用单片机的DAC端口产生偏置,与DDS产生的调制信号经过加法器相加后,通过AD835乘法器与DDS产生的搬运相乘,即可得到调幅波。 改变输出目标 对于直达传输信号,可以通过DDS直接产生不同的偏置、调制信号和载波来控制输出波形的幅度;对于多径传输信号,再通过程控制衰减器PE4302来控制其增益衰减;

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