Research And Developement Of Antenna Measurement Technology For Communication Base Station

Communication base station antenna engineering parameter is an important basis for the network optimization in mobile communication domain,which directly affects the coverage of network wireless,the quality of communication network and users' perception.However,there are many disadvantages in the equipment cost and measurement accuracy of the traditional antenna attitude measurement equipment.With the gradual maturity of multi-antenna GPS combination measurement technology,how to widely apply in various fields,such as technology,military and communication,has become a research hotspot.This thesis makes an in-depth study on the the inertial measurement assisted dual antenna GPS combined attitude measurement technology,mainly includes the following contents:Firstly,this thesis analyzes the measurement principle and common errors of inertial systems and GPS systems,and also briefly introduces the common reference coordinate system and mutual transformation relationships in combined attitude measurement.The attitude measurement solution process of double-difference carrier phase equations is deduced in detail.This thesis mainly introduces the algorithm of LAMBDA and AFM to solve the ambiguity of the whole cycle.A method based on inertial measurement attitude angle assisted AFM algorithm to solve the integer ambiguity is proposed.The error correction of the output attitude angle is carried out through the combined filtering method.The rapid of integer ambiguity resolution and the stability of attitude angle data output are improved.Secondly,on the basis of theoretical modeling,a design scheme for combined attitude measurement system is given.In this thesis,the module of hardware and the design of software solution are described in detail.The data of receiving module mainly includes the GPS module and the inertial measurement module.The GPS module uses Novteal's GPS-OEM receiving board.The inertial measurement module selects MPU6050 card,the raw data and output format of each module are analyzed,respectively.The corresponding unknown parameters are solved by the attitude determination algorithm model.The software design module gives the detailed design flow chart of each function module.The output data communication protocol is also defined for the final data of the system.Thirdly,the article analyzes the accuracy and feasibility of the combined attitude measurement system.Two base station antenna testing instruments,which are more professional in the market,are compared with the combined attitude measurement system.In the ideal environment,the results of different equipments are statistics.After a large number of repetitive tests,the combined attitude measurement system is more stable than the traditional equipment in testing static data,the error range is reduced.In order to integrate and product of the attitude measurement system,the influence of different baseline's length verification about the combination measurement system is also configured.In this thesis,the attitude angle of the communication base station antenna is studied by the combination of attitude measurement theory.Design the software and hardware implementation scheme and realize the commercialization.It provides a certain reference for the development of the attitude test technology for the communication base station antenna.