宽带甚高频雷达目标回波模型与检测性能研究  

Echo Modeling and Detection Performance of Wideband VHF Radar

作　　者：尤君[1] 万显荣[1] 龚子平[1] 程丰[1] 柯亨玉[1] 

机构地区：[1]武汉大学电子信息学院,武汉430072

出　　处：《电子与信息学报》2013年第12期2795-2801,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(41074116;41106156);中央高校基本科研业务费专项资金(2012212020214)资助课题

摘　　要：甚高频(VHF)雷达利用谐振效应使后向散射系数(RCS)显著增加的特性为隐身目标探测提供了一种重要手段,但传统窄带VHF雷达存在最佳工作频率难以确定、低空性能欠稳定、易受干扰等缺点,宽带技术为克服上述缺点提供了途径。工作在谐振区的宽带VHF雷达目标回波与光学区宽带雷达目标回波相比具有显著区别,该文以Boeing747-200为对象研究了宽带VHF雷达目标回波模型及其检测性能。首先获取目标宽带回波仿真数据,然后通过分析仿真数据建立目标宽带回波多散射中心模型,最后在回波模型基础上探讨检测性能。结果表明,谐振区的宽带目标回波仍然具有多散射中心特性;各散射中心的宽带信号回波强度等于工作频带内窄带信号回波强度的均值;宽带VHF雷达相对传统的VHF雷达并不具有明显的检测优势。该文的研究为设计具有探测隐身目标能力的新体制宽带VHF雷达提供了理论依据。Very High Frequency （VHF） radar provides an important method for stealth target detection with the target resonance effect which increases Radar Cross Section （RCS） significantly. However, the traditional narrowband VHF radar has the disadvantages of being difficult to determine optimum operating frequencies, unstable performance in low attitude, being vulnerable to interference, and so on. Wideband technology provides a way to overcome the above disadvantages. The target echo of wideband VHF radar is different from that of wideband radar in the optical region, Boeing747-200 is selected as the specific object to research wideband VHF radar target echo model and its detection performance. First, the simulated wideband echo data are obtained, and then the multiple scattering centers＇ model is established based on the simulated data. Finally, the detection performance of wideband VHF radar is discussed. Results show that in the resonance region targets have the property of multiple scattering centers;the main peak intensity of the scattering center is equal to the mean value of the echo intensity of the narrowband signals in the working band; wideband VHF radar does not have the obvious detection advantage compared with the traditional narrowband VHF radar. This investigation establishes the theoretical foundation for the design of novel wideband VHF radar system with the capability of detecting stealth targets.

关 键 词：甚高频(VHF)雷达 宽带 回波模型 检测性能 

分 类 号：TN958.97[电子电信—信号与信息处理]