Performance Evaluation of Space-Time Spreading and Orthogonal Transmit Diversity

空时扩频与正交发射分集的性能评估(英文)

Space-time spreading (STS) and orthogonal transmit diversity (OTD) are towtransmit diversity schemes proposed by cdma2000 standard. In this paper, performance comparisonanalysis of the two transmits diversity schemes in multipath channel under multiuser situation arecarried out. Link level simulation in forward link cdma2000 is performed in IMT-2000 channel.Performance analysis and simulation results show that the performance improvement provided STS overOTD decreases as the increase of propagation path number and decrease of the user number.

空时扩频 (STS)及正交发射分集 (OTD)是cdma2 0 0 0标准提出的 2种发射分集方案 .本文在多径信道及多用户条件下对 2种方案进行了性能比较分析 .在IMT 2 0 0 0标准信道下进行了链路级仿真 .性能分析及仿真结果表明STS相对于OTD的性能增益随着传播路径的增加及用户数的降低而减少 .