电磁频谱监测中的宽带实时信号采集系统设计

Design on a High speed Real- time Wide Band Spectrum Signal Acquisition System

介绍了一套宽带实时信号采集系统,系统由信号调理单元、时钟调理单元、模数转换单元、FPGA、高速缓存单元、PCIE接口以及电源组成。通过采用超高速ADC、优化传输方式、优化数据存储架构,系统实现了超高速实时宽频带信号数据的采集、传输与记录。系统软件针对数据采集中的高速数据传输方式进行优化设计,通过利用双通道技术,系统的总数据吞吐量能够达到5GB/s。测试结果表明,系统在2GHz带宽内达到了较高的动态指标,能够满足高速频谱信号的记录需求。

This paper introduces a novel wide -band real time signal acquisition system which Is consist of signal conditioning unit, clock generating unit, ADC unit, FPGA, high speed buffering unit, PC1E interface and power modules. By means of ultra - high speed ADC, optimized transferring strategy, and optimized data storage architecture, the system realizes high speed wideband signal recording, transferring and storage. The software of system applies dual - channel technology which achieves 5GB/s data throughput. The test results show that the system achieves the satisfied dynamic performance in 2GHz bandwidth and meets the requirements of high speed spectrum signal recording.