摘要
介绍了基于FPGA的基带信号发生器设计方案,主要叙述了成型滤波以及任意重采样内插比等关键技术。该基带信号发生器不仅实现了标准数字调制格式的基带信号发生,而且通过FPGA内部的并行架构设计,实现了500 MHz的高速数据速率,I/Q带宽达到200 MHz。将其应用于矢量信号发生器中,既实现了PSK、ASK、FSK、MSK、QAM等标准数字调制格式的矢量信号,又实现了400 MHz矢量调制带宽。经过测试,在4 M码元速率的情况下,QPSK和512QAM调制格式的EVM分别达到0.7%和1.0%;400 MHz带宽的矢量调制信号频响小于1dB。
This paper introduces a design of FPGA-based baseband signal generator and mainly describes the key technol-ogies ,w hich are the molding filter and arbitrary resampling interpolation ratio .We not only achieve the standard digital modulation format baseband signals ,but also gain a 500M Hz high-speed data stream and 200 M Hz bandwidth I/Q signal through the design of FPGA internal parallel architecture .After applying it to the vector signal generator ,we realize the standard digital modulation format vector signals ,such as PSK ,ASK ,FSK ,MSK ,QAM ,and the bandwidth of vector modulation signal is as wide as 400 M Hz .Tests show that the EVM of QPSK and 512QAM reaches 0 .7% and 1 .0% re-spectively in the case of 4 M symbol rate ,meanwhile the frequency response of 400 M Hz bandwidth vector modulation signal is less than 1 dB .
出处
《国外电子测量技术》
2017年第10期69-72,共4页
Foreign Electronic Measurement Technology
基金
国家重大科学仪器设备开发专项(2013YQ200607)资助
关键词
基带信号
成型滤波
任意重采样内插比
I
Q
EVM
矢量调制带宽
I/Q
EVM
baseband signal
molding filter
arbitrary resampling interpolation ratio
I/Q
EVM
bandwidth of vector modulation signal
