Design of ultra-wideband pulsar signal acquisition and processing architecture and functional verification
Abstract
<p indent="0mm">The ultra-wideband observation system has a remarkable impact on improving the accuracy of pulsar arrival time. However, the ultra-high-speed data stream generated by the receiving system poses a substantial challenge to the real-time transmission, distribution, and processing of signals. The architecture of the pulsar signal acquisition and processing system is designed using advanced RF-direct signal acquisition and hybrid architecture multifunctional astronomical computing model to prepare the S-band UWB receiving system proposed by QTT. This report used an RFSoC platform to divide the broadband analog signal into two analog sub-bands for acquisition. These were then channelized into multiple digital sub-bands and distributed to multiple HPC processing nodes through two <sc>100 Gb</sc> ports for real-time processing. The acquisition and multifunctional processing of broadband signals and the system architecture are simple and expandable. It can accomplish <sc>3 GHz</sc> broadband signal simultaneous acquisition and multifunctional processing. Remarkably, the system architecture is simple and has high scalability. This research evaluated the functions of radio frequency signal segment acquisition, <sc>100 Gb</sc> network multiplexing, and VDIF data format packetization and conducted the monoband pulsar observation experiment.</p>
