Discriminator: a device that converts a property of an input signal such as frequency or phase into an amplitude variation depending on how the signal differs from a standard or reference signal.
Microwave phase discriminator (MPD) is used to translate the phase information to amplitude information which easy to be processed by the theory of phase interference.
微波鉴相器建立在相位干涉的原理之上，通过相位干涉把相位信息转化成便于处理的幅度信息。
3
This paper describes the defect of amplitude-comparison discriminator in direction-finding system in PRS, then put forward a compensating method of digital automatic gain control.