空时扩频与空时发射分集在cdma2000中的性能比较

应用科学学报 ›› 2002, Vol. 20 ›› Issue (3): 234-238.

空时扩频与空时发射分集在cdma2000中的性能比较

邬钢, 程时昕

东南大学移动通信国家重点实验室, 江苏南京 210096

收稿日期:2001-07-02 修回日期:2002-01-21 出版日期:2002-09-30 发布日期:2002-09-30
作者简介:邬钢(1970-),男,江苏泰州人,博士生;程时昕(1936-),男,上海人,教授,博导.
基金资助:
国家自然科学基金资助项目(69982002);芬兰NOKIA公司资助项目

Performance Comparison Between Space-time Spreading and Space-time Transmit Diversity in cdma2000

WU Gang, CHENG Shi-xin

National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

Received:2001-07-02 Revised:2002-01-21 Online:2002-09-30 Published:2002-09-30

摘要/Abstract

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.

关键词: 峰均比, 空时扩频, 码分多址2000, 空时发射分集

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.

Key words: cdma2000, peak to average power ratio, space-time spreading, space-time transmit diversity

中图分类号:

TN929.533

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.

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.