摘要
软件无线电发射机中，在数字域进行正交调制之前，通常需要进行采样率变换，通过内插、滤波将低速率基带信号的采样率提升到载波NCO采样率上。随着近几年DAC技术的发展，在数字域进行直接射频合成已成为可能。介绍了一种可以在直接射频合成发射机中使用的，参数可配置的，任意采样率变换的FPGA实现方法，能够将低速率的基带信号采样率提升至射频采样率上。
In software defined radio （SDR） transmitter, the baseband data with protocol-specific symbol rate should be up-sampled to the fixed sample rate of synthesized career by arbitrary sample rate conversion （ASRC）, before up-conversion. During the last few years, along with the rapid development of DAC technology, it is possible to implement direct RF synthesis using digital method. This paper presents implementation structure of a reconfigurable ASRC in FPGA, which can be used in Direct RF synthesis transmitter to interpolate the baseband data of variable symbol rate to RF sample rate.
出处
《通信对抗》
2011年第3期41-43,共3页
Communication Countermeasures
关键词
直接射频合成发射机
任意采样率转换
参数可配置
FPGA实现
direct RF synthesis transmitter
arbitrary sample rate conversion（ASRC）
reconfigurable
FPGA implementation
