用于SAW无线无源传感系统阅读器的DDS设计  

DDS Design for Reader of SAW Wireless Passive Sensor System

作　　者：张涛[1] 陈宇航 师晓云 朱寒 苏晓敏 ZHANG Tao;CHEN Yuhang;SHI Xiaoyun;ZHU Han;SU Xiaomin(College of Science, Xi’an University of Science and Technology, Xi’an 710054, China;College of Electrical and Control Engineering, Xi’an University of Science and Technology, Xi’an 710054, China)

机构地区：[1]西安科技大学理学院,陕西西安710054 [2]西安科技大学电气与控制工程学院,陕西西安710054

出　　处：《压电与声光》2022年第3期453-457,共5页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(No.52174151,No.11974275,No.61834005);陕西省联合基金重点基金资助项目(2021JML-05);陕西省重点科技创新团队基金资助项目(2019TD-026);陕西省科技统筹创新工程计划基金资助项目(2012KTCL01-12);陕西省榆林市科技局基金资助项目(2019-138)。

摘　　要：直接数字频率合成器(DDS)具有转换时间快,频率精度高,频带宽等特点,作为现代电子设备的重要部分,现已广泛应用于电子领域。该设计将现场可编程门阵列(FPGA)与DDS相结合,采用自顶向下的模块化设计思想、反馈网络的流水线结构及频率自增设计,以达到扫频效果,并基于CORDIC算法实现相-幅转换,以降低硬件资源消耗,最终在QuartusⅡ开发环境中进行仿真测试。经CORDIC算法计算后输出的正弦波和余弦波幅值分别为32768和56758(16位十进制),输出的正弦和余弦值与预期结果相比,其相对误差仅为6.1×10^(-5)和9.9×10^(-5)。仿真结果表明,该设计方案能有效地解决传统声表面波无线无源传感系统中DDS杂散分量大,时延高及功耗高等问题。As an important part of modern electronic equipment,the direct digital frequency synthesizer(DDS)has been widely used in the electronic fields due to its fast conversion time,high frequency accuracy and wide bandwidth.This design combines the flexible field-programmable gate array(FPGA)and DDS,adopts the top-down modular design idea,the pipeline structure of the feedback network and the frequency self-increasing design to achieve the frequency sweep effect.Based on the CORDIC algorithm,the phase-amplitude conversion is realized to reduce hardware resource consumption.Finally,the simulation test is carried out in the quartus II development environment.The amplitudes of sine wave and sine wave calculated by CORDIC algorithm are 32768 and 56758(in 16-bit decimal system),respectively.The relative errors of the output sin and cos values compared with the expected results are only 6.1×10^(-5) and 9.9×10^(-5),respectively.The simulation results show that the design scheme can effectively solve the problems of large spurious components,high delay and high power consumption of DDS in the conventional surface acoustic wave wireless passive sensing system.

关 键 词：声表面波 直接数字频率合成器(DDS) 现场可编程门阵列(FPGA) CORDIC算法 

分 类 号：TN65[电子电信—电路与系统] TN741