AimTo use the common sample frequency in low speed to the sample of band-pass signals of multiple different frequency point in full frequency rage.

目的用公共的低速采样频率对全频段内许多不同频点的带通信号进行采样。

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Aiming at data acquisition of radar echo signal with low SNR, IF band-pass sampling concept is proposed. High-speed acquisition card PCI_9820 is used to sample in real-time and store data.

针对低信噪比的雷达回波信号数据采集，文中给出了中频带通采样方案，并选用PC I_9820高速采集卡实时采集和存储数据。

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