Design and analysis of GNSS marine reflection signal receiver
Aiming at the requirements of global navigation satellite system(GNSS)marine reflection signal remote sensing technology,a GNSS marine reflection signal receiver is designed to receive GNSS direct and reflected signals.The Doppler delay mapping structure is the key component of the GNSS marine reflection signal receiver.The direct signal channel is closed-loop and the reflection signal channel is open-loop.The reflection signal channel uses the spread spectrum code and Doppler frequency of the direct signal channel to carry out correlation integration in half a C/A chip time to obtain the correlation peak waveform of the reflection signal.Due to the fact that the GNSS signal reflected from the sea surface is a collection of multiple different reflection signals,the correlation waveform of composite code is different from that of direct signal,and their position and shape contains oceanographic parameter information.By using this correlation function waveform,the sea surface wind field information can be calculated.GNSS ocean reflection signal receiver technology can provide technical support for fields such as marine environmental monitoring,basic surveying and mapping,and disaster monitoring.
万方数据
维普
