Secure Communications in High Speed Fiber Optical Networks Using Code Division Multiple Access (CDMA) Transmission

Teknologi High Speed Downlink Packet Access (HSDPA) adalah teknologi mobile data dengan kecepatan tinggi yang merupakan pengembangan dari generasi ketiga Wideband Code Division Multiple Access (WCDMA) yang mampu mentransmisikan data hingga 7.2 Mbps pada single user.Pada analisa kecepatan data HSDPA di Node B BHAKTIJAYAMW menampilkan parameter Payload, Throughput, dan Jumlah user HSDPA. Selain itu dilakukan juga pengukuran PING untuk mengetahui time respon saat melakukan koneksi ke Internet. Dari hasil analisa menunjukkan bahwa kecepatan data maksimum pada kondisi multiuser yang dapat dicapai dari hasil pengukuran statistik data adalah 3.14 Mbps, sedangkan dari hasil perhitungan pengukuran langsung sebesar 2.76 Mbps. Hasil tersebut masih jauh dari kecepatan data 7.2 Mbps untuk layanan HSDPA yang tersedia berdasarkan data vendor, karena kecepatan 7.2 Mbps hanya dapat diakses dengan single user, dan untuk multiuser akan terjadi sharing data.

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Scalability Analysis of Electronic Code Division Multiple Access based Virtual Private Networks over Passive Optical Networks

COIN-NGNCON 2006 - The Joint International Conference on Optical Internet and Next Generation Network ◽

10.1109/coinngncon.2006.4454661 ◽

2006 ◽

Author(s):

Nishaanthan Nadarajah ◽

Elaine Wong ◽

Ampalavanapillai Nirmalathas

Keyword(s):

Optical Networks ◽

Code Division Multiple Access ◽

Multiple Access ◽

Passive Optical Networks ◽

Virtual Private Networks ◽

Scalability Analysis ◽

Code Division Multiple

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Novel tunable ultra-high-speed optical fiber code-division multiple-access networks for real-time computer communications

Proceedings IEEE International Conference on Communications ICC '95 ◽

10.1109/icc.1995.524418 ◽

2002 ◽

Cited By ~ 1

Author(s):

Jian-Guo Zhang

Keyword(s):

Optical Fiber ◽

Real Time ◽

Code Division Multiple Access ◽

Multiple Access ◽

High Speed ◽

Access Networks ◽

Computer Communications ◽

Ultra High Speed ◽

Code Division Multiple

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Увеличение скорости регистрации эхосигналов ультразвуковой антенной решеткой с применением технологии множественного доступа с кодовым разделением

Дефектоскопия ◽

10.31857/s0130308220110019 ◽

2020 ◽

pp. 3-16

Author(s):

В.К. Авагян ◽

Е.Г. Базулин

Keyword(s):

Antenna Array ◽

Large Volume ◽

Code Division Multiple Access ◽

Multiple Access ◽

High Speed ◽

Matched Filtering ◽

Steel 20 ◽

Code Division Multiple

The disadvantage of using the digital antenna focusing (DAF) method to obtain an image of reflectors is a large volume of echo signals and an insufficiently high speed of their registration. To increase it, it is proposed to simultaneously emit sounding pulses by all elements of the antenna array (AR), formed by the sets of code sequences used in the Code Division Multiple Access (CDMA) technology. The measured echoes can be decoded using matched filtering (CF) and the reflectors can be reconstructed using the combined SAFT (C-SAFT) method. The image can be restored without decoding the measured echo signals by the ME method. The proposed technology was tested to obtain images of reflectors in samples of duralumin, steel 20 and steel 40.

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Noise-based spreading in code division multiple access systems for secure communications

International Journal of Communication Systems ◽

10.1002/dac.2840 ◽

2014 ◽

Vol 29 (2) ◽

pp. 402-416 ◽

Cited By ~ 4

Author(s):

Stevan M. Berber

Keyword(s):

Code Division Multiple Access ◽

Multiple Access ◽

Secure Communications ◽

Code Division Multiple

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Performance Evaluation of Correlation Properties of Quasi Orthogonal Prime Codes for Optical CDMA Communication

Journal of Optical Communications ◽

10.1515/joc-2017-0172 ◽

2020 ◽

Vol 41 (2) ◽

pp. 195-207

Author(s):

Deepak Kedia ◽

Ankita Rani

Keyword(s):

Optical Networks ◽

Code Division Multiple Access ◽

Multiple Access ◽

Optical Cdma ◽

Receiver Design ◽

One Dimensional ◽

All Optical ◽

Code Division Multiple ◽

Correlation Properties ◽

Prime Codes

AbstractOptical code division multiple access (OCDMA) is one of the promising technologies to be implemented using all-optical networks. The performance of OCDMA system is largely dependent on the particular codes used for encoding. A proper choice of code family as well as code dimension is of prime importance due to various transmitter and receiver design considerations. This paper mainly aims at evaluation of desirable characteristics of various spreading codes based on the prime sequences. An extensive effort has been done in this paper to evaluate the correlation characteristics of various types of one-dimensional (1-D), 2-D and 3-D prime codes for OCDMA communication system. The detailed mathematical modelling has also been explained. It is observed that an addition in coding dimension leads to significant improvement in the code characteristics.

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