Design of ultra-wideband pulsar signal acquisition and proces-sing architecture and functional verification
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 100 Gb ports for real-time processing.The acquisition and multifunctional processing of broadband signals and the system architecture are simple and expandable.It can accomplish 3 GHz 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,100 Gb network multiplexing,and VDIF data format packetization and conducted the monoband pulsar observation experiment.
digital bakcendultra-widebandpulsar high-precision timingRF-direct sampling
万方数据
维普
