Design and Realization of Digital Down Converters for Wideband Digital Receiver
QIN Rongjie
YUAN Xiao
XIN Chao
LU Dahai
Abstract：According to the requirements of real-time signal processing in a wideband signal receiver,an FPGA-based digital down conversion design scheme with configurable decimation ratio and no frequency mix is proposed. After a detailed analysis of the principle of mixing frequency,a mixing implementation method without NCO and multiplier is presented. The filter in digital down conversion is simulated with Matlab,and the relevant parameters of the filter are obtained. Based on these,each function module is built,connected with fewer Verilog HDL program,and then,downloaded to Xilinx's Zynq FPGA for testing. The test data of I/Q sig?nal from FPGA is done spectrum calculation in Matlab. Comparison between waveform in FPGA and spectrumin Matlab verify the va?lidity and feasibility of the design.
Keywords：digital down conversionFPGAfilterMatlab simulation
Publication Date：2019-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 68-71,127 )