基于FPGA的宽带数字频率综合器的实现

Implementation of the Wideband Numerically Frequency Synthesizer Based on FPGA

随着软件无线电技术的应用,为了在现场可编程门阵列(FPGA)内灵活的实现超外差宽带数字接收机,本文提出了一种基于FPGA的宽带数字频率综合器的实现方法,可以在宽带高模数转换(AD)采样频率范围内,利用宽带数字频率综合器产生的频率与基于多相滤波的数字下变频相结合,完成需要频点的零中频正交变换,便于宽带数字接收机高灵敏度电子侦察检测。

With the application of software radio technology,in order to implement super-heterodyne wideband digital receiver in a flexible way,a wideband digital frequency synthesizer（ WDFS） based on FPGA is presented. Within the wideband frequency range of high-speed AD,it uses the frequency from WDFS combined with the digital frequency down-conversion,which is based on poly-phase filter. It helps wideband digital receiver to perform electronic reconnaissance and detection with high sensitivity.