中文说明：应用背景通信系统时变信道系统建模，BEM模型和LTV模型的种类及仿真，用到relay衰落信道，此类信道建模可以应用到OFDM系统，或者MIMO系统，也可以扩展到大规模MIMO系统关键技术对BEM模型的基指数扩展模型、多项式模型、离散卡洛基模型、椭圆基模型进行仿真，用到LS、MMSE估计技术，也涉及到QAM、QPSK等各种调制技术
English Description：
Application backgroundCommunication system time-varying channel system modeling, kinds and Simulation of the BEM model and the model of LTV, use relay fading channels, such channel modeling can be applied to OFDM systems and MIMO system, can also be extended to the MIMO system in a large scaleKey TechnologyThe BEM model based index expansion model and polynomial model and discrete Kaloki model and ellipse based model simulation, used ls and MMSE estimation technology, also relate to the QAM, QPSK modulation technique