摘要
针对海面风场反演中,采用不同的镜面反射点估计算法计算结果存在较大差异,导致等延迟环和等多普勒带的大小和分布不同,从而使得散射信号二维时延-多普勒相关功率计算的不一致等问题,提出在机载场景下,利用接收机相对于卫星发射机的仰角,来计算二维相关值参考点的时延和多普勒的方法。实验结果与实测数据对比表明,机载条件下,采用该方法计算真实有效,且无需计算镜面反射点的位置,简化了计算过程。
There are big differences in the calculation results of different specular point estimation algorithms used in the sea surface wind field inversion,resulting in different sizes and distributions of the equal delay ring and equal Doppler zone,which makes the inconsistency of the scattered signal two-dimensional delay-Doppler correlation power.Aiming at the problems,a method was proposed to calculate the time delay and Doppler of the two-dimensional correlation value reference point by using the elevation angle of the receiver relative to the satellite transmitter in the airborne scene.The experimental results showed that the calculation of this method was true and effective under airborne conditions,and there was no need to calculate the position of the specular point,which simplified calculation process.
作者
刘原华
刘张文
牛新亮
LIU Yuanhua;LIU Zhangwen;NIU Xinliang(School of Telecommunication and Information Engineering&School of Artificial Intelligence,Xi’an University of Posts&Telecommunications,Xi’an 710121,China;Xi’an Branch of China Academy of Space Technology,Xi’an 710000,China)
出处
《导航定位学报》
CSCD
2021年第6期90-95,共6页
Journal of Navigation and Positioning
基金
陕西省自然科学基础研究计划项目(2016JQ6033)。
作者简介
第一作者:刘原华(1983-),女,陕西西安人,博士,副教授,研究方向为卫星通信、导航和遥感;通信作者:刘张文(1995-),男,安徽安庆人,硕士研究生,研究方向为卫星通信、海面风场反演。
