Results 181 to 190 of about 36,530 (229)

Comparison of CS-CDMA and MC-CDMA : BER and PAPR

MILCOM 2008 - 2008 IEEE Military Communications Conference, 2008
In this paper, a cyclic prefix code division multiple access (CP-CDMA) system with the use of comb spectrum (CS) code, so called CS-CDMA, is described and a comparison between the CS-CDMA and the Multi-carrier code division multiple access (MC-CDMA) is implemented in terms of the bit error rate (BER) performance and peak to average power ratio (PAPR ...
null Hongbing Cheng, null Yu-Dong Yao, null Bingli Jiao   +2 more
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Hybrid ISMA/CDMA and CDMA/ISMA protocols for IWCC

Proceedings of ICUPC '95 - 4th IEEE International Conference on Universal Personal Communications, 2002
This paper presents a novel multiple access scheme, which is a combination of inhibit sense multiple access (ISMA) and code division multiple access (CDMA), for the indoor wireless computer communications (IWCC). This new multiple access scheme is called hybrid ISMA/CDMA protocol.
F. Harmsze, R. Prasad
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CDMA with Partitioned Spreading

IEEE Communications Letters, 2007
An enhancement to code-division multiple access (CDMA) is proposed whereby the signature sequences are partitioned into sections, which are interleaved before transmission. A multistage receiver successively forms soft-bit estimates based on the received sections, which are used to reduce the interference in subsequent stages via signal cancellation ...
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Performance of VSG-CDMA and MC-CDMA in multirate systems

IEEE VTS 53rd Vehicular Technology Conference, Spring 2001. Proceedings (Cat. No.01CH37202), 2002
The performance of two multirate schemes in DS/CDMA systems, variable spreading gain (VSG-CDMA) and multicode (MC-CDMA) are compared. We first present the signal model for a multirate DS/CDMA system. Then, the performance in terms of asymptotic multiuser efficiency (AME), near-far resistance (NFR), and BER are evaluated.
null Zihua Guo, K.B. Letaief
openaire   +1 more source

OCDD/CDMA: a new DS/CDMA with orthonormal code diversity detection

IEEE Transactions on Communications, 2001
Summary: The paper presents a new spread spectrum communication system called orthonormal code diversity detection (OCDD)/CDMA system based on the novel concept of orthonormal-basis diversity, which is a generalization of the existing spread spectrum diversity concepts such as path diversity and frequency diversity.
Byoung-Hoon Kim, Byeong Gi Lee
openaire   +1 more source

Introduction to CDMA

Annales Des Télécommunications, 1993
The purpose of this paper is to introduce the basic concepts of code division multiple access (cdma) to those who are not familiar with the subject area. It briefly covers the two most important forms of spread spectrum modulation, frequency hopping (fh) and direct sequence (ds), before concentrating on cdma based on ds.
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Holographic CDMA

IEEE Transactions on Communications, 1995
Jawad A. Salehi, Eung Gi Paek
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CDMA in Optics

2006 IEEE Ninth International Symposium on Spread Spectrum Techniques and Applications, 2006
As spectrum spreading and CDMA proved themselves as very efficient in radio communication CDMA application in optical communication seamed to be reasonable as well. Research in this field started two decades ago or so and is still flourishing. In this tutorial paper - after giving a brief listing of relevant concepts in optical communications ...
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GDMA, LDS-CDMA, and HDS-CDMA for Uplink Communication Systems

2023 VTS Asia Pacific Wireless Communications Symposium (APWCS), 2023
Mao-Chao Lin, Shih-Kai Lee, Hsiang-Hsuan Fan, Yi-Hua Chen   +3 more
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An Overview of CDMA: Towards Wideband CDMA.

IEEE Commun. Surv. Tutorials, 1998
Ramjee Prasad, Tero Ojanperä
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