A very fast FFT spectrum analyzer for radio astronomy
A very fast FFT spectrum analyzer for radio astronomy
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用于射电天文学的快速 FFT 频谱分析仪
DOI：
10.1109/icassp.1986.1168607
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
S. Nagasawa
中科院分区：
文献类型：
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作者：
Y. Chikada;M. Ishiguro;H. Hirabayashi;M. Morimoto;K. Morita;T. Kanzawa;H. Iwashita;K. Nakazima;S. Ishikawa;Toshikazu Takahashi;K. Handa;T. Kasuga;S. Okumura;T. Miyazawa;T. Nakazuru;K. Miura;S. Nagasawa
宽带FFT频谱分析仪（称为FX）在Nobeyama Radio观测值中正在运行，用于从气云中的分子的无线电波光谱，这是恒星的摇篮。它处理了六个320MHz带宽数据流的输入，以每个1024个频道通道的15个跨功率频谱的输出。该处理速度与往常一样高105倍。它高度平行的管道架构使得达到上述速度成为可能。 FX由大约4500个CMOS门阵列的LSI芯片组成。它们是使用CAD设计的，具有3900或2000门/芯片，以10 MHz的时钟速率运行，并消耗100 MW/芯片或更少。 SNR（信噪比）大于10 dB，这足以适合天文学用途。
A wide-band FFT spectrum analyzer, called FX, is in operation at the Nobeyama Radio Observatory for spectroscopy of radio waves from the molecules in the gas clouds which are the cradles of stars. It processes input of six 320MHz bandwidth data streams into the output of fifteen cross-power spectrums of 1024 frequency channels each. This processing speed is 105times as high as usual computers. Its highly parallel pipeline architecture made it possible to achieve the above speed. The FX is made up of about 4500 LSI chips of CMOS gate arrays. They are designed using CAD and have 3900 or 2000 gates/chip, operate at 10 MHz clock rate, and consume 100 mW/chip or less. The SNR (signal-to-noise ratio) is better than 10 dB, which is adequate to the astronomical uses.