Design and performance of quasi-synchronous multi-carrier CDMA system

被引：0
|
作者：
Tsumura, S [1 ]
Hara, S [1 ]
机构：
[1] Osaka Univ, Grad Sch Engn, Dept Elect Informat Syst & Energy Engn, Suita, Osaka 5600871, Japan
来源：
IEEE 54TH VEHICULAR TECHNOLOGY CONFERENCE, VTC FALL 2001, VOLS 1-4, PROCEEDINGS | 2001年
关键词：
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Muiticarrier (MC)-CDM/CDMA is one of the promising code division-based multiple access/multiplexing techniques for fourth-generation mobile communications systems, where high data rate services will be provided even for high speed-cruising mobiles. Investigations so far made in Japan have shown that, MC-CDM scheme has superiority over direct sequence (DS)-CDM scheme in downlink, on the other hand, MC-CDMA scheme is not so advantageous over DS-CDMA scheme in uplink. This is because the code orthogonality among users can be kept in downlink, whereas it is totally distorted by frequency selective fading in uplink. In this paper, first, we show a new signal design for MC-CDM/CDMA transmission. The new signal format has head/tail guard intervals in one symbol duration, for accurate DFT window synchronization in downlink and uplink, and establishment of quasi-synchronous transmission in uplink. Then, we show the bit error rate performance for MC-CDM with minimum mean square error (MMSE)based combining in downlink and MC-CDMA with MMSE-based multi-user detection in uplink.
引用
收藏
页码：843 / 847
页数：5
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