应用于海面有效波高反演的GNSS-R自相关函数处理方法

GNSS-R Autocorrelation Method Applied on the Inversion of the Significant Wave Height

提出一种新的GNSS海面反射信号自相关函数处理方法,并给出系统结构和检测原理。方法利用接收机直射信号通道的延迟-多普勒映射差分相乘输出结果,对反射信号进行校正,去除导航数据位的影响,实现了对直射和反射信号的协同处理,有效地提高了系统的处理速度,节省了存储资源。利用针对海洋有效波高的岸基实验数据进行系统验证,并给出初步的实验结果。

A new autocorrelation method is given here to analyze the GNSS signals reflected from the sea surface.This method uses the differential-multiplied results of the delay-Doppler maps from the direct signal path to correct the reflected signals and remove the influences due to the navigation bits change.Comparisons of test results show that this method offers more advantages over the conventional method.For example,it realizes the co-operative processing with both the direct and the reflected signals.And it effectively improves the system's processing speed,while saving more memory resource.The experiments with real shore borne receiver demonstrate the effectiveness of this method.