| 空时扩频与空时发射分集在cdma2000中的性能比较 |
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| 引用本文： | 邬钢,程时昕.空时扩频与空时发射分集在cdma2000中的性能比较[J].应用科学学报,2002,20(3):234-238. |
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| 作者姓名： | 邬钢 程时昕 |
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| 作者单位： | 东南大学移动通信国家重点实验室, 江苏南京 210096 |
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| 基金项目： | 国家自然科学基金资助项目(69982002);芬兰NOKIA公司资助项目 |
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| 摘 要： | 现行的cdma2000标准将空时扩频作为一种发射分集方案,而另一种WCDMA标准中的发射分集方案选择却是空时发射分集.在cdma2000前向链路中对两种发射分集方案进行了性能比较分析及仿真,结果表明,在多径衰落信道中,即使信道估计不理想时,两种方案的误帧率性能都是相同的.但是,空时扩频比空时发射分集处理过程更复杂,且需要更高的峰均比.
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| 关 键 词： | 峰均比 空时扩频 码分多址2000 空时发射分集 |
| 文章编号： | 0255-8297(2002)03-0234-05 |
| 收稿时间： | 2001-07-02 |
| 修稿时间： | 2002-01-21 |
Performance Comparison Between Space-time Spreading and Space-time Transmit Diversity in cdma2000 |
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| WU Gang,CHENG Shi xin.Performance Comparison Between Space-time Spreading and Space-time Transmit Diversity in cdma2000[J].Journal of Applied Sciences,2002,20(3):234-238. |
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| Authors: | WU Gang CHENG Shi xin |
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| Institution: | National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China |
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| Abstract: | Space time spreading (STS) is considered as a transmit diversity scheme in the current cdma2000 standard. Space time transmit diversity (STTD) has been adopted in the current WCDMA standard. In this paper, the performance of STS and STTD have been compared and simulated in forward link cdma2000 systems. The performance analysis and simulation results show that these two schemes have approximately the same performance on the frame error ratio in the multipath fading channel even with imperfect channel estimation. However, compared with STTD, STS has more implementation complexity and higher peak to average power ratio. |
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| Keywords: | space time spreading space time transmit diversity cdma2000 peak to average power ratio |
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