摘要
GNSS-R是基于导航卫星照射源的无源雷达探测系统,由于导航卫星信号是基于伪码调制的扩频信号,传统的检测方法中需要对每一颗卫星的反射信号和本地生成的伪码信号的每一个码相位进行相关后再处理。基于循环谱理论的GNSS-R信号检测方法,根据高斯噪声与扩频信号循环平稳特性的差异对GNSS-R信号检测,不需要复杂的码相位搜索过程。仿真结果显示基于循环谱理论的GNSS-R信号检测方法能够有效提高信号检测效率。
GNSS-R is a passive radar system using navigational satellite signal,navigational satellite signal is modulated by pseudo code so it is necessary to correlate the reflected signal with every code phase of local code.In the detection method of GNSS-R signal based on cyclic spectrum,signal detection is based on the difference of Gauss noise and cyclostationary characteristics of spread spectrum signals,the complicated phase searching process is not needed.The simulation results show that the GNSS-R signal detection method based on cyclic spectrum theory can effectively improve the efficiency of signal detection.
出处
《空间电子技术》
2017年第4期87-90,96,共5页
Space Electronic Technology
