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Abstract: We established a new algorithm for correlation process in radio astronomy.This scheme consists of the 1st-stage Fourier Transform as a filter and the2nd-stage Fourier Transform for spectroscopy. The -FFX- correlator stands forFilter and FX architecture, since the 1st-stage Fourier Transform is performedas a digital filter, and the 2nd-stage Fourier Transform is performed as aconventional FX scheme. We developed the FFX correlator hardware not only forthe verification of the FFX scheme algorithm but also for the application tothe Atacama Submillimeter Telescope Experiment ASTE telescope towardhigh-dispersion and wideband radio observation at submillimeter wavelengths. Inthis paper, we present the principle of the FFX correlator and its properties,as well as the evaluation results with the production version.

Autor: Satoru Iguchi, Takeshi Okuda


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