基于PCM2902E的DRM接收前端设计

摘要

The front-end module of DRM receiver system based on software radio technology is designed. The design can convert the analog audio signal from RF module to digital signal by AD9220 and send the digital signal from AD converter to FPGA. The digital signal is extracted to 48 kHz IF signal after digital down converter and filtering. Finally, the signal is packaged as S/PDIF frame which sent to PC through the USB sound card chip PCM2902E. The DRM receiver software on PC demodulate DRM digital baseband signal and verify the correctness of algorithm and circuit design.%设计了基于软件无线电技术的DRM硬件接收前端,该设计可将RF前端接收到的模拟音频信号经过AD9220转换成数字信号送至FPGA,数字信号在FPGA中经过数字下变频和滤波抽取转化为48 kHz采样速率的中频信号,最后该信号封装成S/PDIF帧送至USB声卡芯片PCM2902E,通过USB接口传送给计算机,计算机装载的DRM接收软件进行DRM数字基带信号的软件解调,验证算法与电路设计的正确性.