基于数字中频的短波测向技术  

Shortwave direction finding based on digital intermediate frequency technique

作　　者：张文东[1] 江炜宁[1] 

机构地区：[1]电子测试技术国防科技重点实验室,青岛266555

出　　处：《国外电子测量技术》2009年第3期25-27,共3页Foreign Electronic Measurement Technology

摘　　要：复杂电磁环境下对复杂电磁信号进行测向是电子信息侦测的必要手段。本文根据传统的沃森瓦特测相原理,提出了一种基于数字中频、FFT以及测相算法的三通道短波测向技术。结合通路校准,这项技术可达到很高的性能,具有很好的适用性,表现在:基于电磁信号的频谱监测,可选择性的对电磁信号测向;适用于各种各样复杂的电磁信号;具备同时对多个信号测向的能力。经过验证,此技术非常适合在复杂电磁环境下对复杂电磁信号的测向。In complex electromagnetic environment, complicated electromagnetic signal direction finding is necessary for electronicinformation detection. This paper introduces the technique of shortwave direction finding based on digital inter- mediate frequency,FFT and Waston-Watt principle. With the direction finding of multiple signals, this technique gives good performance of complicated electromagnetic signal direction finding and spectrum analyzing. After verification, this technique is suitable for direction finding of complex electromagnetic signals in complex electromagnetic environment.

关 键 词：沃森瓦特 数字中频 FFT 测向 

分 类 号：TN949.16[电子电信—信号与信息处理]