基于 FPGA 多通道多带宽多速率 DDC 设计

摘要

Digital beamforming based on IF/RF frequency digitalization of the signals in individual re-ceiver channels and the amplitude/phase weighting in digital domain is the key of digital array radar(DAR).It is characterized by flexible beam control and excellent active-jamming suppression performance.The digital array module(DAM)based on multi-channel digital receiver is the key module of DAR.This paper introduces DAM’s multi-channel,multi-bandwidth,multi-rate digital down-converter (DDC)based on field programma-ble gate array(FPGA),including implementation method design,simulation design,and engineering design.The design results are also given.This method can utilized in the design of other multi-channel digitalization receiver.%数字阵列雷达的核心内容之一是单元级回波信号中频或射频数字化后，在数字域进行幅/相加权实现接收数字波束形成，并具有灵活的波束调度和更好的抗有源干扰的性能，基于多通道数字化接收机的数字阵列模块是数字阵列雷达的关键模块。论述了数字阵列模块内部基于 FPGA 的多通道、多带宽、多速率数字下变频设计，包括方案设计、仿真设计和工程化设计，同时给出了设计结果，该设计方法可应用于多通道数字化接收机设计。