多功能相控阵雷达多通道DMA传输系统设计

Design of Multi-channel DMA Transmission System for Multi-function Phased Array Radar

针对传统的应用于机扫雷达的基于PCIE总线的DMA传输方法,无法满足多功能相控阵雷达的数据传输要求的问题,设计一种多通道DMA传输系统,新系统由数据源端发起并控制DMA包传输过程,支持变长度DMA包传输从而实现雷达帧数据与DMA包的对应,通过对传输地址的分组和偏移实现多虚拟DMA通道,该系统采用了国产FPGA芯片与国产CPU芯片实现,测试数据表明新系统稳定可靠,满足多功能相控阵雷达同时多任务的数据传输需求。

Focusing on the problem that the traditional DMA transmission method based on PCIe bus applied to machine scanning radar can not meet the data transmission requirements of multi-functional phased array radar,a multi-channel DMA transmission system is designed.The new system initiates and controls the DMA packet transmission process from the data source,supports variable length DMA packet transmission,so as to realize the correspondence between radar frame data and DMA packet,and realizes multiple virtual DMA channels by grouping and offsetting the transmission address.The system is realized by domestic FPGA chip and domestic CPU chip.The test data shows that the new system is stable and reliable,meeting the multi-task data transmission requirements of multi-function phased array radar.