介绍了一种米波段直接射频采样数字接收机，并通过一个数字接收机的实例说明它的具体设计和实现方式。采用高速ADC、数字下变频DDC和DDS技术构建了以下数字接收系统。文中介绍数字化雷达接收机灵敏度及增益的计算方法。

Metre wave band direct RF sampling digital receiver is introduced in this paper. Main design and implement method is explained by an example of digital receiver. High speed ADC, digital down conversion and DDS technology is adopted to compose the digital receiver system. Calculation method of sensitivity and gain of digital radar receiver is introduced.

TN957.5