基于AD9854的非线性调频脉压雷达信号的产生技术  

Generation technology of non-linear frequency modulation pulse compression radar signal based on AD9854

作　　者：汪洋[1] 师志荣 雷婷[1] 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《电子设计工程》2009年第6期76-77,80,共3页Electronic Design Engineering

摘　　要：由于非线性调频(NLFM)信号固有的距离旁瓣较低而无需加权处理,避免失配损失而倍受关注。介绍一种基于直接数字频率合成(DDS)的非线性调频信号的硬件系统结构和软件设计方法。该设计主要通过控制DDS器件AD9854,采用折线型逼近方式产生非线性调频信号。实验证明该设计满足要求。As a result of NLFM signal is most concern for its lower inherent range sidelobe,which makes weighting processing not required and mismatch loss avoided.A hardware system configuration and software design method of NLFM signal based on DDS are introduced in this paper,which generates NLFM signals by the control of DDS device AD9854 with polygonal line approaching. The experimental result proves that the method meets the design demands.

关 键 词：非线性调频(NLFM) 直接数字合成(DDS) AD9854 旁瓣抑制 

分 类 号：TN958.3[电子电信—信号与信息处理]