Abstract
Very Long Baseline Interferometry (VLBI) is widely used in deep space probes high precision measurements in China. Correlator is one of the VLBI data processing system. Now, the new generation hardware correlator adopt Uniboard as the hardware platform and have been applied to the Chang'E 4 mission which is China's lunar exploration project. The data processing of correlator on uniboard is divided into several chips, so it involves data communication between chips. Multi-chip communication may reach up to 75 Gbps because of data expansion after decoding. Therefore, the high-speed data transmission and data validity are the challenges. This paper will focus on the cross-communication of eight FPGA chips in Uniboard.
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