Design of digital baseband converter for the observation of pulsars based on ROACH2 platform

In order to observe the pulsar and have better understand of the universe, this paper designs a pulsar digital baseband conversion terminal based on rouch2. The arithmetic of digital baseband converter is based on polyphase filter and FFT. The data after baseband conversion need to be packaged, then the data will be transferred to data processing equipment. This pulsar digital baseband conversion was used to observe PSR J0835-4510 and J0332+5434, the data received from the observation was processed by DSPSR (Digital signal Processing for Pulsar) software and the result verified the correctness and applicability of the digital baseband conversion terminal.