基于FPGA的GPS高精度短时标的精度分析与改善

Precision Analysis and Improvement of GPS High Accurate Short Timing Scale Based on FPGA

提出了利用GPS的精确授时功能,采用现场可编程门阵列(FPGA)技术,构建高精度短时标的设计方法。为了确保短时标的同步精度,从晶体的准确度以及守时精度等方面进行了理论和数据分析,采取了一系列措施保证了短时标设计μs级的精度。

GPS can provide high accurate timing scale, but the common GPS receiver can only provide timing scale of second pulse which can not suffice the demand of navigation, electronics, and power transmission which need high accurate timing scale of higher frequency. How to provide high accurate short timing scale is the linchpin upon which these departments use GPS to provide time. High accurate short timing scale using GPS and FPGA based on this point is designed. The system does some theoretic and digital analysis from crystal veracity to timing precision, adoptes a series of measures considering from means to design and ensures the precision of timing.