基于正交上变频器的宽带DDS设计  

Design of Wide-band DDS Based on Quadrature Upconverter

作　　者：江友平[1] 蒋路华[1] 

机构地区：[1]船舶重工集团公司723所,扬州225001

出　　处：《舰船电子对抗》2012年第4期58-60,72,共4页Shipboard Electronic Countermeasure

摘　　要：数字直接频率合成器(DDS)广泛应用于雷达、对抗、通信等领域。利用2个DDS产生频率一致、相位正交的基带I、Q信号,通过正交上变频器,获得2倍于单个DDS带宽的宽带DDS,该方法有效提高了DDS的信号带宽。The digital direct synthesizer（DDS） is widely used in domains such as radar,countermeasure,communication,etc..This paper uses two DDSs to generate the baseband I,Q signals with the same frequency and the quadrature phase,fetches the wide-band DDS whose bandwidth is double of single DDS bandwidth.The method effectively raises the bandwidth of DDS signal.

关 键 词：正交上变频器 数字直接频率合成器 带宽 

分 类 号：TN742.1[电子电信—电路与系统]