Research On Joint Test Of Wireless Channel And Performance For LTE System In High-Speed Mobile Environment

With the increasing demand of mobile communication in high-speed mobile environment,the optimization of wireless communication system in high-speed mobile environment has become a hot research topic in wireless colmunication.The most important prerequisite of studying the optimization of wireless communication system is to accurately acquire the influence mechanism of wireless channel characteristics on system performance.Thus the test on wireless channel and system performance must be carried out.Traditional test methods generally derive channel models with statistical properties in wireless channel testing.System performance test based on a certain channel model,and the average result of system performance under a specific channel model is obtained.Due to the non-stationary and fast time-varying characteristics of wireless channel in high-speed mobile environment,it is difficult for traditional test methods to accurately gain the correlation between channel test results and system performance test results.This thesis proposes a joint test method of wireless channel and system performance for LTE system supporting time-varying non-stationary channel in high-speed mobile environment,and builds a physical joint test platform based on software defined radio.The laboratory test verification and field test verification of the platform show that it can achieve the joint test of wireless channel and performance of LTE system in high-speed mobile environment,which is helpful to establish accurate correspondence between wireless channel characteristics and system performance parameters.The main work and innovations in this thesis are as follows:?.Aiming at the shortcomings of traditional divided wireless channel testing and system performance testing in high-speed environment,the thesis research and propose a joint test of wireless channel and system performance for LTE system,and satisfy the exact correspondence between wireless channel characteristic and system performance in high-speed mobile environment.?.Based on the joint test method proposed in this thesis,the thesis build wireless channel and LTE system performance joint test platform by the software defined radio platform of National Instruments,and then implement joint test both in laboratory and field high-speed environment.