基于DSP BUILDER的数字下变频器设计

The DSP Builder Based Design of Digital Down-converter

介绍利用DSP BU ILDER设计基于FPGA的数字下变频器的方法,研究使用专用乘法器的NCO设计、半波带滤波器多相抽取处理结构和FIR滤波器的分布式算法,同时给出实际应用的设计方案和仿真分析结果。

The design of a FPGA based digital down converter(DDC) by use of the DSP Builder is described.Several algorithm needed in DDC design are discussed in detail,and the Specific multiplier based numerically controlled oscillator(NCO) architecture design is given.The distributed arithmetic of FIR fifter design is introduced.The results of the software emulation and hardware tests show that the designed DDC can meet the various needs of software radio systems.