软件无线电中的数字下变频技术研究  

Investigation of the digital down-converter on software radio

作　　者：任跃[1] 李健[1] 高和亮[1] 

机构地区：[1]内蒙古工业大学信息工程学院,内蒙古呼和浩特010051

出　　处：《山东理工大学学报（自然科学版）》2006年第1期59-61,共3页Journal of Shandong University of Technology:Natural Science Edition

摘　　要：论述了数字下变频器的结构,探讨了采用查表方法实现数字控制振荡器,利用线性内插方法结合级联积分梳妆滤波器实现分数比抽取滤波,从而达到降低数字下变频器复杂性的目的,使得数字下变频处理可以在通用数字信号处理芯片中用软件实现.利用该算法提高了数字下变频器的处理速率,实现了数字载波控制和抽取滤波可编程.One of the key techniques to realize software radio lines in digital frequency transforms. The paper investigate a structure of the digital down-converter（DDC） and put forward a design of numerical controlled oscillator with method of tabulation view and fraction ratio decimation filter with mixing linear interpolation algorithm and CIC filter, so that the DDC process could be implemented in software on general purpose DSP chip and afford greater flexibility. The algorithm improves the speed of DDC and implements programmable NCO and decimation filter by design software.

关 键 词：软件无线电 数字下变频 数字控制振荡器 线性内插 

分 类 号：TN92[电子电信—通信与信息系统]