宽带内多目标信号原始数据分离技术实现  

Realization of raw data separation of multiple target signals within broadband

作　　者：郭静 黄朋[1] 隋晓波 GUO Jing;HUANG Peng;SUI Xiaobo(The 41st Institute of CETC,Qingdao 266000,China)

机构地区：[1]中国电子科技集团公司第四十一研究所,青岛266000

出　　处：《集成电路与嵌入式系统》2025年第4期66-71,共6页Integrated Circuits and Embedded Systems

基　　金：国家重点研发计划资助(2023YFF0717400);国防基础科研计划资助(JCKY2022210B006)。

摘　　要：复杂电磁环境条件下多目标信号同时出现,综合测试系统需具备对同时到达信号的独立实时分析能力,受限于宽带数据量巨大,现有系统无法对多目标信号进行无缝提取与实时处理。为满足宽带内高密度目标信号原始IQ数据的提取需求,本文基于FPGA高速数字信号处理技术实现带宽内多通道任意频点下变频与可变分析带宽抽取滤波,配合组帧与分时调度读取控制,通过DDR4缓存和PCIe 3.0×4总线上传,可实现80 MHz中频带宽内同时分离出最多32路最大分析带宽300 kHz的目标信号原始IQ数据。系统在显示宽带信号频谱的同时能够自适应多路不同IQ数据速率,实现多通道IQ数据的无缝传输,在测量过程中支持随时对目标信号数目、频率与带宽参数进行修改与数据实时提取。该项技术为宽带内多目标信号实时参数分析奠定了基础,提高了综合测试系统的高密度信号实时处理能力。Under complex electromagnetic environment conditions,multiple target signals appear simultaneously.The comprehensive testing system needs to have independent real-time analysis capabilities for simultaneously arriving signals.Due to the huge amount of broadband data,existing systems cannot seamlessly extract and process multiple target signals in real time.To meet the extraction re-quirements of high-density target signal raw IQ data within broadband,this paper uses FPGA high-speed digital signal processing tech-nology to achieve multi-channel down conversion at any frequency point within the analysis bandwidth and variable analysis bandwidth extraction filtering.Combined with framing and time-sharing scheduling read control,it can simultaneously separate up to 32 channels of target signal raw IQ data with a maximum analysis bandwidth of 300 kHz within an 80 MHz intermediate frequency bandwidth using DDR4 buffering and PCIe 3.0×8 bus transmission.The system adapts dynamically to transmit multi-channel IQ data at different rates while displaying the broadband signal spectrum,achieving seamless transmission of multi-channel IQ data.During the measurement process,it supports the real-time modification of the number,frequency,and bandwidth parameters of the target signal.This technology lays the foundation for real-time analysis of multi-target signal parameters within broadband,and improves the real-time analysis and processing capabilities of high-density signals in comprehensive testing systems.

关 键 词：数字下变频 DDC PCIE IQ数据 FPGA 

分 类 号：TN47[电子电信—微电子学与固体电子学]