双选择性信道下联合Doppler分集的MIMO-OFDM系统研究  

Joint space diversity with doppler diversity in MIMO-OFDM wireless communications systems

作　　者：王健康[1] 李祥明[2] 罗涛[1] 尹长川[1] 乐光新[1] 

机构地区：[1]北京邮电大学数字通信与信息网络实验室,北京100876 [2]重庆邮电学院通信与信息工程学院,重庆400065

出　　处：《通信学报》2004年第12期179-186,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(90104018;60472070)国家"863"计划基金资助项目(2003AA12331004)

摘　　要：提出联合考虑空间分集与Doppler分集的方法来提高时变多径衰落信道下高速移动通信系统的性能。给出了联合考虑空间分集与Doppler分集的MIMO系统模型,推导出了时变多径衰落信道下系统所能获得的最大分集阶为MtMr(L+1)(Q+1),并提出了利用空时编码、预编码和OFDM技术相结合来提高系统性能的方法。通过仿真验证了分集技术的结合可以带来系统性能的提高。Jointing space diversity with Doppler diversity in MIMO wireless communications is researched in this paper. The MIMO channel model that joints space diversity with Doppler diversity is set up. Based on it, we show that the maximum diversity order is MtMr(L+1) (Q+1). Then, the scheme which joints OFDM technique in this situation is proposed. Following this, simulation are provided to corroborate our theoretical findings.

关 键 词：无线通信 DOPPLER分集 时间-频率双选择性衰落 MIMO OFDM 

分 类 号：TN911.22[电子电信—通信与信息系统]