A wideband real-time spectrometer based on combined complex FFT for radio astronomy

Author

Xianhai Wang ; Qiao Meng ; Han Jinlin ; Wang Chen ; Jianwei Zhang

Author_Institution

Inst. of RF- & OE-ICs, Southeast Univ., Nanjing, China

fYear

2014

fDate

23-25 July 2014

Firstpage

685

Lastpage

689

Abstract

We developed a 1.2 GHz bandwidth spectrometer based on combined complex FFT algorithm for radio astronomy. It resolves the contradiction between wide bandwidth and high speed real-time processing by using the combined complex FFT algorithm. Block-RAMs(BRAMs) in FPGA are saved by parallel processing and module multiplexing, while the computation time also decreases significantly due to symmetry properties of intermediate variables in data processing. Observations at Shanghai Astronomical Observatory for pulsars with the developed spectrometer show that the system works well and meets the requirements of the observation.

Keywords

astronomy computing; fast Fourier transforms; field programmable gate arrays; parallel processing; pulsars; radioastronomy; spectrometers; BRAM; Block-RAMs; FPGA; Shanghai Astronomical Observatory; complex FFT algorithm; data processing; frequency 1.2 GHz; high speed real-time processing; module multiplexing; parallel processing; pulsars; radio astronomy; wideband real-time spectrometer; Field programmable gate arrays; Hardware; Radio astronomy; Real-time systems; Wideband; FPGA; Spectrometer; combined complex FFT; parallel processing; pulsars;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication Systems, Networks & Digital Signal Processing (CSNDSP), 2014 9th International Symposium on

Conference_Location

Manchester

Type

conf

DOI

10.1109/CSNDSP.2014.6923914

Filename

6923914