基于DDS的数字波束形成技术实验研究  

Experimental Verification for Digital Beam Forming Technique Based on DDS

作　　者：崔鹏飞[1,2] 李进兰[3] 倪崇[1,2] 郭俊栋[1] 徐向辉[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100190 [3]山东科技大学,泰安271021

出　　处：《科学技术与工程》2010年第6期1410-1413,共4页Science Technology and Engineering

基　　金：中国科学院知识创新工程三期(053Z170138)资助

摘　　要：数字波束形成(DBF)技术可以有效减少合成孔径雷达天线体积,提高雷达的分辨率和成像速度。结合实际预研需要,在数字波束形成(DBF)的概念基础上,采用直接数字频率合成技术,运用实验室现有基带信号板,混频器,示波器等设备,设计实验方案,搭建实验链路,验证数字波束形成的工程可实现性。通过实验过程和对实验结果的分析,为在现有技术和设备条件下,合成孔径雷达采用数字波束形成技术进行了可行性验证和技术积累。并根据实验结果进行了可行性分析及工程实现难点分析,为今后的实际工程实现提供了参考方案和设计依据。Digital Beam Forming （DBF） can reduce the volume of SAR＇ s antenna efficiently;improve the resolving power of SAR. To fulfill the requirement of a project, DDS technology is used to design a scheme to verify the feasibility of DBF based on the equipments of the laboratory , such as the signal sources, mixer, and oscilloscope. Next, the theory of the experiment and the designation of the circuit of the scheme are introduced. Through the experiment, some experience is got for the realization of a SAR with DBF technologies and the engineering feasibility was verified. Based on the process of the experiment, analysis about the difficulties in design a SAR with DBF technologies is presented. Some reference is provided for the designation later.

关 键 词：合成孔径雷达 数字波束形成 直接数字频率合成 

分 类 号：TP957.52[自动化与计算机技术]