The Research For MIMO Communication Technology Based On Three-dimensional Mobile Space Channel Model

Due to the Multiple Input Multiple Output(MIMO)system not only has the advantage of restraining interference,anti-multipath fading and so on,but also can significantly improve the system’s capacity and improve the quality of communication,recently it has received the widespread attention at home and abroad.At present,MIMO technology has occupied the unshakable position in the mobile communication system of the fourth generation,and it must become the main method of communication for all arms of our army in the near future.The research target of the article is to design a set of practical and feasible of the MIMO communication scheme,which is based on the air-ground communication wireless channel model as the main research object.The plan should be under the precondition of satisfying the technical indexes system,and the plan should has the system with simple structure and the algorithm with low complexity,these are usually the difficulties of designing the system,and it is just the focus of this article.This article’s main research content is as follows:First,the article studies modeling method of MIMO channel in the two-dimensional(2d)plane,and it mainly analyzes the parameters in the system model’s influence on the spatial correlation of MIMO system,including topology structure of the antenna arrays,the spacing of the antenna arrays,the Power Azimuth Spectrum(PAS)of sending and receiving the signals,the extension of angle and such parameters.Thereby establishing a MIMO air-ground communication channel model,simulation proves the correctness of the channel model.Next,considering the angle extension of the direction of the pitching angle,we established a three-dimensional(3d)MIMO model of the communication channel on the basis of the 2d model.For the characteristics of the unmanned aerial vehicle(UAV)communication environment and MIMO communication system,we combine the 3d space correlation method modeling with a fuselage cover phenomenon,and put forward a kind of Spatial Channel Model with 3d mobile of UAV,3D Dynamic Spatial Channel Model,which is referred to as3DD-SCM.We have proved that the channel model is correct and effective by simulating.Then,considering the problems existing in the traditional polarization model,this article on the basis of the traditional 2d polarization model was improved,deduced the more accord with the actual communication model of 2d polarization and the three dimension polarizationmodel is studied in the same way.The simulation results show that the multi-polarization correctness and rationality of the model.At last,we designed a set of practical and feasible MIMO communication system solutions,and studied respectively the space-time block codes and the channel estimation technology which are used in the system.From the perspective of spatial correlation,through simulation to study the influence of the channel on the MIMO communication system,we verified the performance of the system.The research of this topic laid the theoretical basis and design reference for the implementation of the future air-ground MIMO communication platform.