摘要
现行的 cdm a2 0 0 0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 cdm a2 0 0 0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 。
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.
出处
《应用科学学报》
CAS
CSCD
2002年第3期234-238,共5页
Journal of Applied Sciences
基金
国家自然科学基金资助项目 (69982 0 0 2 )
芬兰 NOKIA公司资助项目
