Speaker
Description
In order to construct a submillimeter interferometer in Antarctica, the correlator is a core component that converts the signals received by two antennas into digital signals and performs correlation operations to obtain the visibility function. This talk will introduces a design scheme for the correlator of this project. Firstly, in order to ensure the coherence between the antennas, we will use fiber optic transmission to provide a common frequency reference to each antenna for signal acquisition and processing. Install a data acquisition device on each antenna and transmit the collected data to the central processor through optical fiber. At the same time, time synchronization between the two antennas is also a key factor. On the central processor, the high-speed data from two antennas will be received first, and the data from the two antennas will be aligned based on the geometric delay and instrument delay, and relevant processing will be performed using acceleration techniques. This article provides preliminary design and simulation of these, and presents some test results in Lab.
