基于FPGA的DDS正弦波的设计和实现  

Design and implementation of DDS sine wave based on FPGA

作　　者：李义 杨自恒[1] 刘爽[1] 杨培宇 Li Yi;Yang Ziheng;Liu Shuang;Yang Peiyu(Heilongjiang University,Harbin 150000,China)

机构地区：[1]黑龙江大学

出　　处：《无线互联科技》2019年第11期62-63,70,共3页Wireless Internet Technology

摘　　要：FPGA凭借其高速的数据处理速度,如今在电子通信和信号处理领域得到了广泛的应用,并已成为通信仪器和设备的首选方案。另外,由于DDS频率转换时间段、分辨率高等优点,文章提出了基于FPGA芯片设计DDS系统的方案。该方案利用Xilinx公司的Vivado2016.4开发软件利用Verilog编程,完成DDS核心部分的设计,包括相位累加器以及ROM表的生成和初始化文件,并且通过改变频率控制字来控制输出正弦波的频率,然后把生成的数字正弦信号通过ADI公司的AD9751DAC转换为模拟量。最后完成每个模块与系统的时序仿真,验证设计的正确性。With its high speed data processing speed,FPGA has been widely used in the field of electronic communication and signal processing,and has become the first choice of communication instruments and equipment.In addition,due to the advantages of DDS frequency conversion period and high resolution,this paper puts forward the design scheme of DDS system based on FPGA chip.The scheme USES Xilinx company Vivado2016.4 development software use Verilog programming,to complete the DDS core part of the design,including the formation of phase accumulator and ROM table and the initialization file,and by changing the frequency control word to control the output sine wave frequency,then the digital sine signals generated by the ADI company AD9751 DAC converted to analog.At last,the time series simulation of each module and the system is completed to verify the correctness of the design.

关 键 词：FPGA 直接频率合成 VERILOG 正弦波 DAC 

分 类 号：TN74[电子电信—电路与系统]