Proposal of time-delayed diversity (TDD)/satellite diversity (Sat.D) system for mobile broadcasting geostationary satellite system

The paper deals with the proposal of a combination system of time-delayed diversity (TDD) and satellite diversity (Sat. D) (TDD/Sat.D system) for a mobile broadcasting geostationary satellite system. The characteristics measurements of fundamental elements are carried out using Global Positioning System (GPS) signals. Prior to examining the TDD/Sat.D system, the measured TDD and Sat.D systems data are summarized. Based on the collected data, it can be clarified that approximately 40% satellite visibility without the Sat.D or TDD systems can be improved to approximately 70-80%. However, better satellite visibilities will be required for high quality data communication or image communication systems. On considering the measured results of the TDD and Sat.D system characteristics, the paper propose the TDD/Sat.D system. Using the TDD/Sat.D system, satellite visibility for target signals in urban cities can be remarkably improved.