Performance Evaluation of GNSS Receiver in Multi-constellation System

With the increasing demand of users' multi-constellation will be one of the best modes in future satellite navigation system. This basically provides a user the best accuracy in his position, motion and time. For given any positioning information at least four in view satellites are required. In this paper, the main idea is to integrate more satellite system and to achieve higher accuracy by increasing the number of satellites. DOP (Dilution of Precision) factors depending on this available satellites are the most fundamental components in the navigation system which give the timely cautioning for the malfunctioning satellites. From the simulation results, it is evident that all DOPs in multi-constellation are reduced with the combined effects of GNSS systems, which is the first requirement of any positioning accuracy. This availability of more in view satellites and combining signals from different navigation systems will help to minimize DOP and will yield an accurate position with higher precision level.