卫星时频生成与保持技术中的基准频率处理技术研究

发布时间：2018-02-28 09:07

本文关键词： 频率处理 DDS 群相位相位差测量　出处：《西安电子科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：本论文作为基础性研究,根据我国导航卫星时频生成与保持技术的要求,利用DDS将星载原子钟输出的10MHz信号经过频率处理产生高频率稳定度、高分辨率、低相位噪声的基准10.23MHz时频信号。对于主备钟信号的相位差测量,本文根据群相位同步的概念,通过参考频率信号和被测频率信号之间相位重合检测构成测量闸门的方法消除了通常计数测量方法中存在的士1计数误差,测量分辨率能够大幅提高。通过实验表明,该方法宽范围的测量分辨率可达5×10-11/s,满足低成本、宽范围的应用需求。该基准频率处理技术可以根据记录下卫星星载钟的漂移数据,如根据温度—频率变化数据算出调整信号,控制DDS保证基准频率信号的稳定度。由于成本低,灵活,信号处理范围宽,因此可以广泛运用于一些高精密仪器的设计,填补我国高精密仪器设计的空白,产生可观的社会和经济效益。
[Abstract]:As a basic research, according to the requirement of time frequency generation and maintenance technology of navigation satellite in China, this paper uses DDS to process the 10MHz signal of spaceborne atomic clock through frequency processing to produce high frequency stability and high resolution. Low-phase noise reference 10.23MHz time-frequency signal. For the phase difference measurement of the master and backup clock signal, according to the concept of group phase synchronization, By detecting the phase coincidence between the reference frequency signal and the measured frequency signal, the method of detecting the phase coincidence between the reference frequency signal and the measured frequency signal to form the measuring gate eliminates the taxi 1 counting error in the usual counting measurement method, and the measurement resolution can be greatly improved. The wide range resolution of the method can reach 5 脳 10 ~ (-11) / s, which can meet the requirements of low cost and wide range of applications. The reference frequency processing technique can calculate the adjusted signal according to the satellite satellite clock drift data recorded, such as the temperature-frequency change data, and control the DDS to ensure the stability of the reference frequency signal. Because of the wide range of signal processing, it can be widely used in the design of some high-precision instruments, fill the blank in the design of high-precision instruments in China, and produce considerable social and economic benefits.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：V474.2;P228

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