DUC的FPGA实现及在EDGE-QAM中的应用

DUC's Implementation in FPGA and Application in EDGE-QAM System

针对EDGE-QAM系统的应用,提出了利用FPGA芯片进行DUC处理,外接高速DAC进行数模转换,从而直接输出多通道射频QAM调制信号的方法。对DUC的结构及滤波器、NCO等关键模块的实现进行了阐述,并给出了实现后的实测结果。结果表明该技术非常适合多通道EDGE-QAM的应用,具有较高的输出性能。

A way to processing DUC in the application of EDGE-QAM is put forward in this paper. It designs DUC in FPGA chip, then connects the output to high speed DAC to convert digital signal to analog signal, finally outputs multi-channel RF QAM signal. The structure of DUC and the imple- mentation of filter and NCO and other critical modules are also described in this paper. A test result is also attached which proves that this technology is quite suitable for the application of EDGE-QAM system and has a high outout oerfomlance.