Comparative Research Of Multilateration Positioning Algorithm

Along with the sustaining growth of Chinese economy, air-transportation is developingrapidly, and security pressures of air traffic control are increasing. In order to further enhancethe level of civil aviation’s safety, we need to increase the research and developmentinvestment of new surveillance technologies, including multilateration system. The systemwhich has many of the good characteristics, such as high positioning accuracy, low cost, andinstall easily, has been used in many countries around the world.The thesis firstly made a comparative analysis for various types of the civil aviationsurveillance technologies. Through the analysis of domestic and international multilaterationresearch, it was indicated the importance and urgency of our national development of civilaviation and military security. Then it described the working principle, components, features,and applications of the multilateration system in detail. On the basis of analysis of home andabroad multilateration algorithms, whose two classical algorithms are Chan and Taylor, whichwere carried out theoretical analysis and simulation comparison in depth. By analyzing theadvantages and disadvantages of the two algorithms, we proposed the constrained initial valueof the high-precision iterative targeting algorithm or called collaborative algorithm based onChan algorithm in order to overcome the limitations of the two algorithms. In the samesimulation conditions, we illustrated the advantages and disadvantages of the improvedalgorithm, verified the validity of the algorithm and improved the positioning accuracy.Subsequently, other positioning algorithms were analyzed and compared, such as theFang, SI, SX and Friedlander algorithms, including a positioning solution using targetbarometric altitude. By the end of this thesis, a few issues of the multilateration’s positioningaccuracy were analyzed, which included various types of error analysis and the relationshipbetween the number of base stations and geometric dilution of precision, we also introducedan estimate of TOA.