mimo无线通信系统的统一建模-read.pdf

第20 卷第4 期 系 统 仿 真 学 报© Vol. 20 No. 4 2008 年2 月 Journal of System Simulation Feb., 2008 MIMO 无线通信系统的统一建模 1,2 1 伍裕江 ，聂在平 (1. 电子科技大学电子工程学院，四川 成都 610054 ；2.广东通宇通讯设备有限公司, 广东 中山 528437) 摘 要：提出一种统一的多天线通信系统传输模型，该模型将收发间通道分为电路、近场区和远场 区三部分，通过广义欧姆定律联系电路和近场参数，利用基于矩量法的广义阻抗矩阵精确描述多天 线和近场区参数，通过基于远场近似的无线信道模型联系收发端的远区场；给出不同近场环境下的 仿真结果，并在此基础上详细研究了天线互耦、失配和近区散射体对系统性能的影响，与已有结果 进行了比较，分析了异同处。 关键词：MIMO 系统；传输模型；矩量法；互耦 中图分类号：TN 911.2 文献标识码：A 文章编号：1004-731X (2008) 04-1036-05 Unified Transmission Model for Multiple-Input Multiple-Output Wireless Systems WU Yu-jiang1,2, NIE Zai-ping1 (1. School of Electronic Engineering, UEST of China, Chengdu 610054, China; 2. Tongyu Communication Equipment Co., Ltd, Zhongshan 528437, China) Abstract: A unified Multiple-Input Multiple-Output (MIMO) transmission model, which may be decomposed into transceiver circuit model, near-field region model and far-field region model, was proposed. This proposed model used the moment methods to simulate the near-field environment accurately; and applied generalized matrix Ohm’s law to connect the near field and circuit model; while employed the classical wireless channel model based on far-field approximation to connect the far-fields of the multi-antenna in transmitter and receiver respectively. Different near-field environments were investigated, and comparisons were made with the existed approaches. Key words: Multiple-Input Multiple-Output systems; transmission model; Moment Meth