An asynchronous spread spectrum multi-carrier multiple access system

被引：0
|
作者：
Kaiser, S [1 ]
Krzymien, WA [1 ]
机构：
[1] DLR, German Aerosp Ctr, Inst Commun Technol, D-82234 Oberpfaffenhofen, Germany
来源：
GLOBECOM'99: SEAMLESS INTERCONNECTION FOR UNIVERSAL SERVICES, VOL 1-5 | 1999年
关键词：
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we investigate the effects of the asynchronism of user signals in the uplink of a spread spectrum multi-carrier multiple access (SS-MC-MA) system. The proposed uplink SS-MC-MA scheme uses for synchronization only the frame structure received on the synchronous downlink and requires no additional synchronization measures. A guard interval that is smaller than the sum of the maximum time offset between the users and the maximum excess delay of the frequency selective multipath channel is used. It minimizes the loss in bandwidth efficiency by allowing residual interference. The residual interference is minimized by proper positioning of the detection interval in the receiver. It is shown that with this approach the guard interval can be reduced by about 50%.
引用
收藏
页码：314 / 319
页数：6
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