BAND-LIMITED QUASI-SYNCHRONOUS CDMA - A NOVEL SATELLITE ACCESS TECHNIQUE FOR MOBILE AND PERSONAL COMMUNICATION-SYSTEMS

被引：94

作者：

DEGAUDENZI, R

ELIA, C

VIOLA, R

机构：

[1] Department of Electrical Systems, European Space Agency

来源：

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS | 1992年 / 10卷 / 02期

关键词：

Digital Communication Systems;

D O I：

10.1109/49.126984

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：

Recent trends in digital communications are opening commercial applications to code division multiple access (CDMA). In this paper, a novel access technique based on bandlimited quasi-synchronous CDMA (BLQS-CDMA) is described, showing all the advantages of synchronizing conventional direct sequence CDMA to drastically reduce the effect of self-noise. Bandlimitation is achieved with no detection loss by means of Nyquist chip shaping, leading to a simple all-digital demodulator structure. Detection losses due to imperfect carrier frequency and chip timing synchronization are analytically derived and numerical results checked by computer simulations. Impairments due to satellite transponder distortions are also evaluated. The full digital modem structure is presented together with possible applications to mobile and VSAT satellite communications.

引用

页码：328 / 343

页数：16