The Implementation and Test of Phase Calibration Signal's Extraction in CDAS
Wei Ye, Xiang Ying · Annals of Shanghai Astronomical Observatory Chinese Academy of Sciences · 2010
Extraction of phase calibration signal in observing station or through correlations can measure the relative instrumental delay in base-band converter's channels,and thereby can correct the additional instrumental delay.This paper describes the phase calibration signal extraction's theory and algorithm in CDAS(Chinese VLBI Data Acquisition System) and implementation using FPGA.Some tests are given and analyzed.