基于DDS的BPM短波授时信号设计

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. 

Design of BPM HF signal based on DDS

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.