An efficient modeling of series-parallel structure for the digital downconversion of pulsar signals in astronomical observation system

作者：Wan, Guo Chun; Liu, Wen Jing; Zhang, Ying Qian; Tong, Mei Song^*

来源：International Journal of Numerical Modelling: Electronic Networks, Devices and Fields , 2019, 32(1): e2464.

DOI：10.1002/jnm.2464

• digital downconversion (DDC)
• field programmable gate array (FPGA)
• polyphase filters
• pulsar signal
• series-parallel structure

This paper proposes an efficient modeling of series-parallel structure for the digital downconversion (DDC) implemented in the field programmable gate array for astronomical observation system. The received signals by a radio telescope are of intermediate frequency, and they can be stored and analyzed only after having been converted into digital baseband signals. Although many algorithms have been proposed for the traditional DDC, it is still hard to balance the working frequency of signals and the hardware resources of field programmable gate array. The proposed series-parallel structure can not only solve the problem but also provide a more compact size, lower consumption of power, and transplanting ability for the DDC module. The new structure has been used for the signal processing of pulsars in an astronomical observation system, and those merits have been validated.

• 出版日期2019-2
• 单位同济大学