The Digital Demodulation Module of Receiver Based on Ground Interrogator

Based on the practical engineering application, it is realized the design of digital demodulation module of the receiver in the ground interrogator of a certain type secondary radar. The interrogator on the ground adopts a single-pulse direction measurement receiver with amplitude comprised system, separating the RF interrogation signal from transmitter into Σ interrogation signal and Δ control signal. In this paper, the design of the module is on Σ signal and Δ signal from receiver for a series of digital demodulation operation, testing and translating the coded values of the power level of the response signals.