基于信噪比方法的天地波混合体制雷达一阶回波谱提取  

First-order Sea Clutter Spectrum Extraction Based on SNR Method for HF Hybrid Sky-surface Wave Radar

作　　者：纪永刚[1,2] 张杰[1,2] 王彩玲[1] 楚晓亮[1] 王祎鸣[1,2] 杨龙泉[3] 

机构地区：[1]国家海洋局第一海洋研究所,青岛266061 [2]国家海洋局航天科技集团公司海洋遥测工程技术研究中心,青岛266061 [3]中国电波传播研究所,青岛266071

出　　处：《电子与信息学报》2015年第9期2177-2182,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61032011);海洋公益性科研专项项目(201505002)资助课题

摘　　要：天地波混合体制高频雷达(简称天地波雷达,HFHSSWR)海面一阶谱的频移和展宽特性,使得其一阶谱的提取比高频地波雷达(HFSWR)更困难。该文研究了天地波雷达一阶谱频移和展宽特性,并基于其在2维距离-多普勒谱上连续分布的特点,将信噪比方法应用于天地波雷达一阶谱提取。通过双基地角、电离层和海流等对一阶谱频移及展宽特性的定量分析,确定了信噪比方法中一阶谱中心位置、谱峰宽度、左右一阶谱间距等参数的计算方法和取值范围。并利用2维信噪比方法,解决由于天地波雷达信噪比下降引起的一阶谱边界检测不精确的问题。最后,将信噪比法分别应用于仿真和实测天地波雷达数据,验证了方法的有效性。The characteristics of frequency shift and broadening of first-order sea clutter for High Frequency Hybrid Sky-Surface Wave Radar（HFHSSWR） make it harder to isolate the first-order sea clutter spectrum than that of High Frequency Surface Wave Radar（HFSWR）. In this paper, the characteristics of first-order sea clutter for HFHSSWR are investigated, and based on its continuously distribution character on the range-Doppler spectrum, the Signal-to-Noise Ratio（SNR） method is used to isolate the first-order sea clutter spectrum for HFHSSWR. From the quantitative analysis of the frequency shift and broadening of the first-order clutter spectrum caused by the bistatic angle, the ionospheres＇ conditions and the ocean current, the estimation method and the value ranges of three parameters are given, which are the center location, the width of first-order sea clutter spectrum and the spacing of the two first-order sea clutter peak. 2-D SNR method is used to solve the problem that the first-order spectrum boundary can not be determined accurately because of the low SNR. Finally, the proposed method is applied to both the simulated and the field data to verify its validity.

关 键 词：天地波混合体制雷达 海面一阶谱 信噪比方法 

分 类 号：TN958[电子电信—信号与信息处理]