Uncoded throughput capacities of optical CDMA communication channels

被引：0

作者：

Shalaby, HMH ^{[1
]}

机构：

[1] Univ Alexandria, Fac Engn, Dept Elect Engn, Alexandria 21544, Egypt

来源：

THIRD WORKSHOP ON PHOTONICS AND ITS APPLICATION AT EGYPTIAN ENGINEERING FACULTIES & INSTITUTES | 2002年

关键词：

Optical SS communications; optical CDMA; code division multiple access; optical networks; channel capacity;

D O I：

10.1109/PAIA.2002.995080

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A comparison between the performance of several optical code-division multiple-access (CDMA) correlation receivers is presented. The performance is measured in terms of an uncoded throughput capacity. It is defined as the maximum data rate (in nats/chip time) that can be achieved with arbitrary small error probability. Both on-off keying (OOK) and pulse-position modulation (PPM) CDMA schemes are considered. Signature code correlations bounded by either one or two are employed. Our results reveal that the throughput capacity of the optical PPM-CDMA systems can be increased by increasing the code-correlation constraint from one to two. That of OOK-CDMA systems, however, cannot be increased. Further, the throughput capacity of PPM-CDMA systems with code-correlation constraint of two is greater than that of OOK-CDMA systems with code-correlation constraint of one or two. In fact, this improvement in the throughput of PPM-CDMA systems over that of OOK-CDMA approaches a limiting factor of 10 as the pulse-position multiplicity increases to infinity.

引用

页码：62 / 75

页数：14