基于双谱鉴相的数字干涉仪测向技术  

Digital Interferometer Direction Finding Technology Based on Bispectrum Phase Detection

作　　者：马贤同[1] 罗景青[1] 阮怀林[1] 

机构地区：[1]电子工程学院,安徽合肥230037

出　　处：《现代防御技术》2012年第5期126-129,140,共5页Modern Defence Technology

摘　　要：数字干涉仪测向体制中相位差信息的提取因受到噪声的影响,降低了其鉴相精度。根据高斯噪声双谱为0的特点,提出了一种基于双谱鉴相的数字干涉仪测向算法,对单频信号进行测向。分别从不加噪声的理想情况和存在高斯噪声的情况进行理论推导,论证了两者的一致性,并给出了信号频率和相位差信息的提取方法。与传统的频域鉴相算法相比较,仿真结果表明该算法可以有效地抑制高斯噪声,提高鉴相精度,验证了该算法的有效性。In the digital interferometer direction finding system, collecting the phase difference infor- mation is influenced by noise, reducing the accuracy of phase detection is based on the bispectrum of Gaussian noise is zero, a new phase detection method for digital interferometer direction finding of single frequency signal is presented. On condition of non-noise or Gaussian noise, both of them have the same performance, and the method of collecting the frequency and phase difference information is presented. Compared with traditional phase detection algorithm based on frequency domain, the simulation results show that this algorithm can suppress Gaussian noise and increases the accuracy of phase detection, and the effectiveness of the new method is certified.

关 键 词：双谱 数字干涉仪 测向 高斯噪声 鉴相 

分 类 号：TH744.3[机械工程—光学工程] TN911.7[机械工程—仪器科学与技术]