摘要
GNSS-R是以GPS卫星作为外辐射源的无源探测系统,本文研究了GNSS-R体制下的信号模型,提出了一种基于直达通道信息的反射通道信号数据位校准算法,依据此对反射通道实测信号进行校准,消除数据为跳变对积累结果的影响。在上述基础上研究比较了长码积累与分组码积累的性能,分析了卫星平台及目标运动下单源信号的有效积累时间,在此基础上提出了基于直达通道信息的反射信号补偿算法,通过对实测信号处理结果表明可以有效提高信号积累峰值。
GNSS-R is a passive radar system using GPS signals,prior research using these signals has been limited by low signal power of the reflected GPS signals. In this paper,a processing technology of single GPS satellite signal in the passive detection system was proposed. The model of GNSS-R system was introduced with an analysis of GPS signal at first,then a method for the calibration of data codes was proposed,this method improves accumulation performance,after that the result of Long code accumulation was compared with the result of short codes accumulation,on the basis of this,the compensation algorithm of the reflection channel signal based on the information of the direction channel is proposed in this paper,the real experiment data shows that this compensation algorithm Enhance the performance.
出处
《电子设计工程》
2017年第22期124-127,共4页
Electronic Design Engineering
关键词
GNSS-R
单源
估计
补偿
积累
GNSS-R
single source
estimation
compensation
accumulation
