一种全数字脉冲信号延迟转发系统  

One kind of all-digital pulse signal delay-broadcast system

作　　者：李赓[1] 白雪 金兆健[1] 吴琼之[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《电子设计工程》2017年第24期50-54,共5页Electronic Design Engineering

摘　　要：基于对脉冲信号的多路延迟转发的需求,本文介绍了一种基于软件无线电思想设计的全数字脉冲信号延迟转发系统。描述了系统架构,给出了以FPGA为核心处理器的系统框图,同时描述了信号处理流程及逻辑设计,其中包括数字上、下变频中的并行DDS和多相滤波,以及延迟模块的实现。完成了基于FPGA及高速A/D、D/A的系统实现,在Xilinx的Vivado开发环境下完成了逻辑设计。实测表明该系统能够正确产生多路延迟后的脉冲信号,具有系统结构简洁、参数设置灵活以及功能改进潜力大等优点。Due to the requirement of multi-channel delaying and broadcasting pulse signal, this paper introduces one kind ofall - digital pulse signal delay - broadcast system , which is designed based on Software Defined Radio. The architecture of system is in detail,so does the system on FPGA.In the meantime, the signal processing and logic design is also described, including the parallel DDS and polyphase filter in digital up-converter and digital down-converter , and the realization of delay module .The system was implemented based on FPGA, high speed A/D and D/ A, the logic design was implemented in the Xilinx Vivado development environment.The practice proved that the system can successfully generate multi-channel delayedpulse signal,and the system has the advantages of simple structure , flexible parameter setting and great potential for function improvement.

关 键 词：延迟转发 FPGA 数字变频 多相滤波 

分 类 号：TN99[电子电信—信号与信息处理]