Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ieeep..75.1203c&link_type=abstract
IEEE, Proceedings (ISSN 0018-9219), vol. 75, Sept. 1987, p. 1203-1210.
Astronomy and Astrophysics
Astronomy
51
Cmos, Computer Aided Design, Fast Fourier Transformations, Large Scale Integration, Radio Astronomy, Spectrum Analysis, Bandwidth, Interstellar Matter, Pipelining (Computers), Signal To Noise Ratios, Surface Acoustic Wave Devices, White Noise
Scientific paper
A wide-band FFT spectrum analyzer, called FX, has been in operation since 1983 at the Nobeyama Radio Observatory for spectroscopy of radio waves from interstellar molecules. It processes an input of six 320-MHz-bandwidth data streams to produce the output of fifteen cross-power spectra of 1024 frequency channels each. Its highly parallel pipeline architecture made it possible to achieve 10-billion butterfly operations per second. The FX incorporates about 4500 newly developed CMOS LSI chips. They are designed using CAD and have 3900 or 2000 gates/chip, operate at a clock rate of 10 MHz, and consume 100 mW/chip or less. For at 80-MHz bandwidth signal at an optimum input level, the signal-power to noise-power ratio of the FX is better than 10 dB, which is adequate for astronomical use.
Chikada Yoshiro
Hirabayashi Hisashi
Ishiguro Masato
Morimoto Masaki
Morita Koh-Ichiro
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