A time interval measurement system based on FPGA used for frequency calibration

Author

Xianghong, Lu ; Rujun, Chen ; Zhanxiang, He ; Kailin, Qiu

Author_Institution

Sch. of Info-Phys. & Geomantic Eng., Central South Univ., Changsha, China

fYear

2010

fDate

3-6 May 2010

Firstpage

1404

Lastpage

1408

Abstract

The performance of GPS based frequency standard depends on the accuracy and stability of the time interval measurement. Based on the XILINX Spartan-3 FPGA, this paper mainly describes a time interval measurement system which is controlled by the PicoBlaze soft core embedded processor and is suitable for the frequency calibration of GPS based frequency standard. Besides receiving the measurement data and the time information of GPS module, PicoBlaze is used to supervise the system status, which ensures the whole system work effectually. The system has been implemented using XC3S200 device and the test show that the whole system works perfectly and meets the requirement of GPS based frequency standard.

Keywords

Global Positioning System; calibration; embedded systems; field programmable gate arrays; frequency standards; microprocessor chips; FPGA; GPS based frequency standard; PicoBlaze soft core embedded processor; XC3S200 device; XILINX Spartan 3; frequency calibration; time interval measurement system; Calibration; Counting circuits; Field programmable gate arrays; Frequency measurement; Frequency synchronization; Global Positioning System; Interpolation; Measurement standards; Phase measurement; Time measurement; GPS based frequency standard; PicoBlaze; XILINX Spartan-3; frequency calibration; time interval;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC), 2010 IEEE

Conference_Location

Austin, TX

ISSN

1091-5281

Print_ISBN

978-1-4244-2832-8

Electronic_ISBN

1091-5281

Type

conf

DOI

10.1109/IMTC.2010.5488207

Filename

5488207