Open AccessAn efficient channelization architecture and its implementation for radio astronomy
Author(s) -
W. Liu,
Qiao Meng,
C. Wang,
Caihua Zhou,
SM Yao,
Irfan Tariq
Publication year - 2021
Publication title -
journal of instrumentation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.741
H-Index - 84
ISSN - 1748-0221
DOI - 10.1088/1748-0221/16/08/p08047
Subject(s) - channelized , field programmable gate array , bandwidth (computing) , computer science , architecture , fast fourier transform , computer architecture , computer hardware , radio astronomy , embedded system , telecommunications , physics , astronomy , algorithm , art , visual arts
Channelization is one of the most important parts in a Digital Back-End(DBE) for radio astronomy. A DBE with wider bandwidth and higher resolution consumes larger amount of computing and memory resources, which results in much higher hardware cost. This paper presents an efficient channelization architecture, which consists of Bit-Inverted, Parallel Complex Fast Fourier Transform(BIPC-FFT) and In-place Forward-Backward Decomposition(IPFBD). The efficient architecture can assist with saving a lot of resources, so a wide-band and high-resolution DBE can be implemented on an resource restricted platform. Based on the efficient channelization architecture, we designed a Dual-Input, 64K-Channelized prototype DBE with 1.2 GHz bandwidth on a Xilinx Virtex-6 LX240T Field Programmable Gate Array(FPGA) chip. The test results in the lab and observation results at Yunnan Observatory demonstrate the DBE can be used for radio astronomy.