Code-spread CDMA with interference cancellation

被引：24
|
作者：
Frenger, PK [1 ]
Orten, P [1 ]
Ottosson, T [1 ]
机构：
[1] Chalmers Univ Technol, Commun Syst Grp, Dept Signals & Syst, SE-41296 Gothenburg, Sweden
来源：
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS | 1999年 / 17卷 / 12期
关键词：
code division multiple access (CDMA); low-rate convolutional codes; maximum free distance; orthogonal codes; parallel interference cancellation; rate compatible; successive interference cancellation;
D O I：
10.1109/49.814815
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：
The performance of an asynchronous code division multiple access (CDMA) system (uplink) employing very low-rate maximum free distance codes for combined coding and spreading is analyzed when successive or parallel interference cancellation is applied. An analytical approach to the evaluation of the bit error rate is presented and shown to give results dose to simulations. Our results show that the code-spread system outperforms the conventionally coded and spread system. Without interference cancellation the single-user bound is never reached (except for one user). With two stages of parallel interference cancellation, a code-spread system with a load only slightly less than 1 bit/chip can obtain a bit error rate very close to that of a single-user system.
引用
收藏
页码：2090 / 2095
页数：6
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