基于DDS的BPM短波授时信号设计  

Design of BPM HF signal based on DDS

作　　者：赖文彬 李实锋[1] LAI Wenbin;LI Shifeng(National Time Service Center,Chinese Academy of Science,Xi’an 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院大学,北京100049

出　　处：《全球定位系统》2021年第4期16-21,共6页Gnss World of China

摘　　要：BPM短波授时是利用短波电台进行我国标准时间和标准频率的发播,是一种经济而又方便的授时方法.为解决BPM(中国科学院国家授时中心短波授时台)应用终端开发调试和测试标定的问题,在分析了BPM短波授时信号的特性和基于直接数字式频率合成器(DDS)技术信号生成原理的基础上,采用了现场可编程门阵列(FPGA)芯片EP2S60F1020C4ES以及数模转换器(DAC),通过理论分析结合仿真实验和捕获的实际波形验证了设计的正确性,进而为新一代BPM短波授时信号模拟器的设计研究和BPM应用终端开发调试、测试标定提供了基础.BPM HF timing service is a kind of economical and convenient timing service method,which uses short wave radio station to transmit and broadcast the standard time and frequency in China.In order to solve the developing and testing problem of BPM applications,we analyze the characteristics of the BPM HF signal and use the direct digital synthesizer(DDS)technology.In addition,field-programmable gate array(FPGA)and digital to analog converter(DAC)are used as the core hardware platform to complete this design.The theoretical calculation and simulation results prove that the design worked well and it can surely promote the development of BPM HF timing technologies.

关 键 词：BPM(中国科学院国家授时中心短波授时台) 短波授时信号 直接数字式频率合成器(DDS)技术 现场可编程门阵列(FPGA) 数模转换器(DAC) 

分 类 号：P127.1[天文地球—天体测量]