多分量信号的直接数字合成方法与实现  

Direct Digital Synthesis Method and Implementation of Multi-component Signal

作　　者：邓红玉 童子权[1] 盖建新[1] 李卓然 DENG Hong-yu;TONG Zi-quan;GAI Jian-xin;LI Zhuo-ran(School of Measure-control Technology and Communication Engineering,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]哈尔滨理工大学测控技术与通信工程学院,黑龙江哈尔滨150080

出　　处：《哈尔滨理工大学学报》2018年第4期59-63,共5页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(61501150);黑龙江省自然科学基金(QC2014C074)

摘　　要：传统的方式构建多分量叠加的复杂波形时,需要较大的波形存储容量和复杂的硬件电路设计。针对这一问题,研究了一种多分量信号的直接波形数据合成方法,该方法充分利用FPGA的硬件资源,建立了基于DDS原理的正弦波、三角波和脉冲波的基础分量模型,可直接设置每个基础分量的幅度、频率、相位和脉宽,然后进行多分量波形数据直接叠加,经数模转换后产生模拟波形。还对多分量信号直接数字合成相关误差进行分析,并以单片FPGA为载体设计了28个正弦波分量、2个三角波分量、2个波脉冲分量的直接数字合成电路。该方法的突出优点是可由众多分量构建复杂波形、参数设置方便、模拟电路简单。With the traditional way to construct the complex waveform of multiple components,the large waveform storage capacity is needed and the design of the hardware circuit is complex.To solve this problem,in this paper,a method of direct waveform data synthesis of multi-component signals is studied,making full use of the hardware resource of FPGA,and establishes the basic component model of sine wave,triangle wave and pulse wave based on DDS principle,which can directly set the amplitude,frequency,phase and pulse width of each base component.Then,the multi-component waveform data is directly superimposed,and the analog waveform is generated after the digital analog conversion.Also,the relative error of direct digital synthesis of multi component signals is analyzed,and the direct digital synthesis circuit of 28 sine waves,2 triangular wave components and 2 pulse components is designed by using single chip FPGA as the carrier.The outstanding advantages of the method are that the complex waveforms can be constructed from many components.The parameters are convenient and the analog circuit is simple.

关 键 词：多分量信号 直接数字合成 FPGA 

分 类 号：TH911.7[机械工程]