Computer Science ›› 2015, Vol. 42 ›› Issue (12): 201-206.

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Research on Position Equation Direct Solving Method in Multi-constellation Satellite Navigation System

WANG Wen-wen, ZHANG Ke and HUANG Bin   

  • Online:2018-11-14 Published:2018-11-14

Abstract: In the navigation positioning system,the traditional least squares method requires linear iteration for solution,which brings great computation and affection to real-time performance and stability.Aiming at this problem,and considering the feature that there are more visible satellites in multi-constellation satellite navigation system,two direct solving methods which use “3+2+2” and “3+3+2” satellites were put forward.Also,when there are more than 9 visi-ble satellites in triple system,the method of converting nonlinear equations into linear equations was proposed.The proposed three methods do not require assuming the initial position coordinate of receiver,thus linear iteration can be avoided and computation load is reduced.Simulation results show that the proposed methods are effective and reliable for position solving in multi-constellation satellite navigation system.

Key words: Navigation positioning,Multi-constellation,Direct solving method,Least squares method

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