【作者】 王小凡； 唐友喜；

【Author】 Wang Xiao fan Tang You xi (National Key Laboratory of Communication,UESTC,Chengdu 611731,China)

【机构】 电子科技大学通信抗干扰技术国家级重点实验室；

【摘要】 数字下变频技术是软件无线电的关键技术之一,其功能是将宽带高速数据流信号转变为窄带低速数据流信号,以实现信号的实时处理。采用CORDIC算法实现的数字下变频器,克服传统下变频器查询表大的缺点,能够有效提高信号处理的效率,减少硬件设计的代价,非常适合在FPGA中实现。更多还原

【Abstract】 Digital down conversion is one of the key technologies in software defined radio.Its function is to transfer wideband high speed data signals to narrowband low speed data signals,so that they can be processed in real time.The DDC based on CORDIC algorithm overcomes the shortcomings of traditional DDC in which a large look-up table is needed.The CORDIC-based DDC can improve the efficiency of signal processing and reduce the cost of hardware.Therefore it is very suitable for implementation in FPGA.更多还原