MMSE frequency-domain equalization combined with space-time transmit diversity and antenna receive diversity for DS-CDMA
MMSE frequency-domain equalization combined with space-time transmit diversity and antenna receive diversity for DS-CDMA
复制标题
DS-CDMA 的 MMSE 频域均衡与空时发射分集和天线接收分集相结合
DOI：
10.1109/vetecs.2004.1387996
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
F. Adachi
中科院分区：
文献类型：
--
作者：
K. Takeda;F. Adachi
最小均方误差频域均衡（MMSE-FDE）与相干RAKE合并相比，可以改善DS-CDMA的传输性能。为了进一步提高系统性能，本文提出了空时发射分集和天线接收分集相结合的方法。通过计算机仿真分析了DS-CDMA系统上、下行链路的误比特率（BER）性能。仿真结果表明，采用STTD和天线接收分集技术结合MMSE-FDE可以有效地改善系统的误码率性能。当在基站和移动的站都使用STTD/接收分集时，对于小数量U的用户，上行链路和下行链路都具有几乎相同的BER性能。随着U的增加，上行链路的性能下降，并表现出BER地板由于大的多用户干扰（MUI）。然而，当使用SF=64的扩频因子时，当U=16时的上行链路BER本底可以减小到大约2/spl乘以/10/sup-3/。
DS-CDMA transmission performance can be improved with minimum mean square error frequency-domain equalization (MMSE-FDE) compared to the use of coherent rake combining. In this paper, to achieve a further performance improvement, combined use of space-time transmit diversity (STTD) and antenna receive diversity is applied. The bit error rate (BER) performances of DS-CDMA downlink and uplink are evaluated by computer simulation. It is confirmed that the use of STTD and antenna receive diversity combined with MMSE-FDE is very effective to improve the BER performance. When STTD/receive diversity is used at both base and mobile stations, both uplink and downlink have almost the same BER performance for small number U of users. As U increases, the uplink performance degrades and exhibits BER floors due to large multiuser interference (MUI). However, the uplink BER floor When U=16 can be reduced to around 2/spl times/10/sup -3/ when the spreading factor of SF=64 is used.
DOI：
10.1109/35.714618
发表时间：
1998-09
期刊：
IEEE Commun. Mag.
影响因子：
--
作者：
F. Adachi;M. Sawahashi;H. Suda
通讯作者：
F. Adachi;M. Sawahashi;H. Suda