基于双基雷达原理的GNSS海面反射信号建模方法

发布时间：2018-04-02 04:02

本文选题：全球导航卫星系统(GNSS)　切入点：反射信号　出处：《北京航空航天大学学报》2017年08期

【摘要】：全球导航卫星系统反射(GNSS-R)技术应用过程中接收机的测试验证需要反射信号产生源,以降低成本。信号的模型是GNSS-R信号产生源中的核心。针对缺乏相应模型的问题,提出了一种根据双基雷达原理建立GNSS海面反射信号模型的方法。首先,在分析GNSS海面反射信号特征的基础上,选取了恰当的海面反射点。然后,计算了雷达方程中的散射系数和散射面积,从而得到相应反射点的反射信号功率。最后,对所求得的反射信号参数进行仿真验证。验证的结果表明,反射信号的相关功率曲线与ZV模型理论曲线的相关系数优于0.98,能够有效地用于GNSS海面反射信号的生成。因此,该方法可为GNSS-R信号产生源的研制提供一定的理论支撑。
[Abstract]:In the application of GNSS-R (Global Navigation Satellite system) technology, the test and verification of the receiver need the source of the reflected signal to reduce the cost. The model of the signal is the core of the source of the GNSS-R signal. A method of establishing GNSS sea surface reflection signal model based on bistatic radar principle is proposed. Firstly, on the basis of analyzing the characteristics of GNSS sea surface reflection signal, the appropriate sea surface reflection point is selected. The scattering coefficient and the scattering area in the radar equation are calculated, and the reflected signal power of the corresponding reflection point is obtained. Finally, the parameters of the reflection signal are simulated and verified. The correlation coefficient between the correlation power curve of the reflected signal and the theoretical curve of the ZV model is better than 0.98, which can be effectively used to generate the reflected signal of the GNSS sea surface. Therefore, this method can provide some theoretical support for the development of the source of the GNSS-R signal.
【作者单位】：北京航空航天大学电子信息工程学院;
【基金】：国家自然科学基金(61171070)~~
【分类号】：TN967.1

【相似文献】