Research On Receiver And Inversion Method Of Significant Wave Height Based On GNSS-R

At present, the Global Navigation Satellite system reflected signal (Global Navigation Satellite Systems Reflectometry, GNSS-R) technology is a new rising remote sensing technology. There are several advantages of GNSS-R technology such as without requirement of sole transmitter, rich of signal resource, high time and space resolution, all-weather, strong immediacy, low cost. So it is one of the current hotspot in field of GNSS applications. The technology is mainly used in inversion of sea surface wind speed and direction, sea ice detection and significant wave height and so on surface information acquisition, which are of great importance to service ocean disaster prevention and reduction, the navigation safety.This thesis first introduces the available signal sources of GNSS and elaborates the technology principle and characteristic of GNSS-R in detail. On the basis of the study, the marine reflection system architecture and each functional module using GNSS-R is described. According to the shore-based experimental data, the receiver not only realize acquisition and tracking algorithm of direct channel, but also signal processing of reflection channel.Secondly, on the base of studying the significant wave height inversion methods using GNSS-R, there introduces technology principle and specific process of using DCF and ICF measuring significant wave height. By studying the reflection characteristics of signal power and signal-to-noise ratio of the research, this paper presents a new method of inversion of SWH using reflection signal-to-noise ratio,and gives details of the technical route and the concrete process.Finally, upon completion of the above research, through the shore-based platform to build GNSS-R receiver, deployment and implementation of the inversion of the significant wave height experiments, the actual data is collected and preprocessing with related algorithm. The preliminary experimental results are obtained. According to the analysis and comparison of experimental results, this paper proves superiority and feasibility of the method, which giving practical value and realistic significance for subsequent of research and application...