基于现代DSP技术的全数字MQAM调制器的设计

摘要

利用MQAM调制的基本原理,采用基于ISE DS的System Generator工具,设计了一个基于FPGA的多进制QAM调制器,在给出了系统设计框图后,重点介绍了扰码器、差分编码器、星座映射单元、nR成形滤波器等模块的设计方法,实现了64QAM的基带调制和中频处理,最终在FPGA上予以实现.%According to the ultimate principle of the MQAM modulation, the tool of System Generator in ISE DS is used to design a multimode QAM modulator based on FPGA. After the system design schematic is given, some units are specified, including scrambler, serial to parallel, differential encoding, mapping, and shaping filter, etc. Then, the 64QAM baseband modulation and IF design are realized. The QAM modulator is ultimately implemented on the FPGA device.