Hybrid Positioning Algorithm for Galileo and WCDMA Dual-Mode Receiver

One crucial problem of satellite navigation is the reduced accuracy for location inside buildings and urban canyons. A hybrid positioning algorithm for satellite navigation and cellular radio networks can resolve the problem. This paper studies and compares satellite-based positioning algorithms and hybrid positioning algorithm. Simulation and analysis results show that although hybrid positioning is not as good as double difference in positioning accuracy, but it does not have to satisfy the condition that 4 or more than 4 satellites must be in view. At the same time, its positioning error is less than static positioning, especially when few satellites can be observed. Therefore, combining advantages of satellite navigation system and cellular system, we can develop a better receiver which can be used in both urban area and rural area.