不同无线场景下多用户MIMO-OFDM技术的性能仿真与分析  

Performance simulation and analysis of multi-user MIMO-OFDM in different wireless scenarios

作　　者：唐琳钧[1] 景小荣[1] 陈前斌[1] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2013年第5期574-578,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家科技重大专项(2011ZX03003-001-01);重庆市自然科学基金(CSTC;2010BB2417);重庆市教委科研项目(KJ110526)~~

摘　　要：以IMT-Advanced信道模型为基础,针对多用户MIMO-OFDM技术中的空间复用、空间分集和波束赋形及结合有限反馈的波束赋形等关键技术,研究了多用户MIMO-OFDM技术在不同无线场景下的误码性能。仿真结果表明,采用空间分集技术时系统性能最佳;采用波束赋形技术的系统性能显著优于空间复用;基于有限反馈的波束赋形技术能进一步降低LTE-Advanced系统的误码率。Based on the IMT-Advanced channel model, we study the performance of the bit error rate （BER） for the spa- tial multiplexing, spatial diversity, beamforming combined with limited feedback in muhi-user MIMO-OFDM systems in dif- ferent wireless scenarios. The simulation results indicate that the system with the spatial diversity is the best one; and the one with the beamforming technology performs remarkably better than that with the spatial multiplexing technology; the sys- tem with the beamforming technology based on limited feedback can greatly reduce the BER.

关 键 词：MIMO—OFDM 波束赋形 空间复用 空间分集 

分 类 号：TN911.7[电子电信—通信与信息系统]