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A7121在数字音频无线传输系统中的应用

Keywords: 数据通讯,音频信号处理,无线传输系统,射频通讯,单片机

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Abstract:

针对目前大多数短距离无线传输方案音质差、成本高的现状,提出了一套运用A7121、WM8725、ATmega48等低成本芯片来实现高保真数字音频无线传输系统的设计方案,具体阐述了系统的总体设计框图、硬件电路设计和软件编程.实验表明,该方案成本低、音质好、抗干扰性强,其主要技术指标达到总谐波失真仅0.1%,频率响应为20Hz~20kHz,信噪比为95dB,有效传输距离达100m,音频输出达到CD音质效果.

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