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A digital pulsar backend based on FPGA

Jin-Tao Luo, Lan Chen, Jin-Lin Han, Ali Esamdin, Ya-Jun Wu, Zhi-Xuan Li, Long-Fei Hao, Xiu-Zhong Zhang

Abstract


A digital pulsar backend based on a Field Programmable Gate Array (FPGA) is developed. It is designed for incoherent de-dispersion of pulsar observations and has a maximum bandwidth of 512 MHz. The channel bandwidth is fixed to 1 MHz, and the highest time resolution is 10 μs. Testing observations were carried out using the Urumqi 25-m telescope administered by Xinjiang Astronomical Observatory and the Kunming 40-m telescope administered by Yunnan Observatories, targeting PSR J0332+5434 in the L band and PSR J0437–4715 in the S band, respectively. The successful observation of PSR J0437–4715 demonstrates its ability to observe millisecond pulsars.


Keywords


instrumentation: miscellaneous — methods: data analysis — pulsars: general

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DOI: http://dx.doi.org/10.1088/1674%E2%80%934527%2F17%2F1%2F9

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Print ISSN: 1674-4527

Online ISSN: 2397-6209