Code Division Multiple Access applied to fiber optic data transmission

by Tracey Alan Fischer

Written in English
Published: Pages: 62 Downloads: 259
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Subjects:

  • Electrical and computer engineering
The Physical Object
Pagination62 p.
Number of Pages62
ID Numbers
Open LibraryOL25474922M

FDDI (Fiber Distributed Data Interface) - FDDI (Fiber Distributed Data Interface) is a set of ANSI and ISO standards for data transmission on fiber optic lines in a local area network (LAN) that can extend in range up to km ( miles).   The present invention is hybrid wavelength division multiplexing (WDM)/code division multiple access (CDMA) fiber optic encoder and decoder hardware. It provides multiple, concurrent, asynchronous, bursty communication at up to full data rate over a set of network ports.   Seyedzadeh et al. [17] reported experimental and simulation results from a variable-weight spectral amplitude coding optical code division multiple access (VW-SACOCDMA) system. The results outlined a back-to-back system with a minimum average power per chip, which maintained acceptable performance. The transmission used 60 km of fiber.   The technique of fiber-optic CDMA is a very good selection for developing optical fiber as a broadband transmission medium. Code-division multiple-access system possesses anti-interference characteristics and can solve the bursty traffic problem. It enhances the system capacity and has good secrecy.

Code division multiple-access techniques in optical fiber networks-- Part II: Systems performance analysis J.A. Salehi, C.A. Brackett (IEEE Transactions on Communications ) Coherent ultrashort light pulse code-division multiple access communication systems J.A. Salehi, A.M. Weiner, J.P. Heritage (Journal of Lightwave Technology ). In the meanwhile, because of extensive data transmission and sharing, data security has become an important problem and receives considerable attention in current research literature. This thesis focuses on data security issues at the physical layer of optical networks involving code-division multiple access (CDMA) systems and steganography. Let consider an access network characterized by an incoherent and non-synchronous direct sequence OCDMA (DS-OCDMA) system. Each user data rate is given by D= 1/T b, where T b is the bit time duration. Before sending the users data over the optic fiber, each user data is spread. Time-division multiplexing was first developed for applications in telegraphy to route multiple transmissions simultaneously over a single transmission line. In the s, Émile Baudot developed a time-multiplexing system of multiple Hughes telegraph machines. In , the British Army used the Wireless Set No. 10 to multiplex 10 telephone conversations over a microwave relay as far as 50 miles.

spread spectrum communication code division multiple access cryptography optical fibre communication phase coding mode-locked laser signal steganographic fiber-optic transmission coherent spectral-phase-encoded optical CDMA stealth communication spectral efficiency spread spectrum optical code-division multiple-access ( ) Fiber optics. B-CDMA: broadband code division multiple access Broadband code division multiple access (B-CDMA) is designed to correct many of the inherent short-falls of IS (narrowband CDMA) and other digital narrowband technologies. In addition, it is being designed as a long-term solution to both voice and data wireless needs -- fixed and mobile. This study developed a bipolar optical code division multiple access (Bi-OCDMA) technique based on spectral amplitude coding for the formation and transmission of optical-polarized and coded signals over wireless optical channels. Compared with conventional Bi-OCDMA schemes, the proposed free-space optics communication system that [ ] Read more. Get this from a library! Fixed broadband wireless communications: principles and practical applications. [Douglas H Morais] -- "Fixed broadband wireless systems give service providers and enterprises flexible, cost-effective ways to deliver, from "long-haul" to "last-mile," voice and Internet/data .

Code Division Multiple Access applied to fiber optic data transmission by Tracey Alan Fischer Download PDF EPUB FB2

CODE DIVISION MULTIPLE ACCESS APPLIED TO FIBER OPTIC DATA TRANSMISSION Fischer, Tracey A. i* ":rD QFPOQ' ID YE COVERED [aT DATE OF REPORT (Yra' Month Day) jS PAGE (O-Nf Master's Thesis 'OM R _ OSeptember 6 3 3SA CZE IS SU~j(CT TERIAS, Contitou# on~ rowip,~ if nttfUarr, and by (1 numnbed.

'This book delivers more than its title seems to promise. Rather than simply presenting the key principles of Optical Code Division Multiple Access (OCDMA), it also provides a very useful introduction to optical fiber transmission systems.' K. Alan Shore Source: Optics and PhotonicsCited by:   "This book delivers more than its title seems to promise.

Rather than simply presenting the key principles of Optical Code Division Multiple Access (OCDMA), it also provides a very useful introduction to optical fiber transmission systems." K.

Alan Shore, Optics and PhotonicsCited by: Code Division Multiple Access applied to fiber optic data transmission. By Tracey Alan Fischer. Get PDF (3 MB) Abstract.

Approved for public release; distribution is unlimitedThe potential for applying Code Division Multiple Access techniques to achieve simultaneous multichannel data transmissions over a fiber optic data link is investigated Author: Tracey Alan Fischer. Pertaining to modulation Code Division Multiple Access applied to fiber optic data transmission book (a) independently codes data in multiple channels for transmission over a single wideband channel, such as a fiber optic channel, (b) may be used as an access method that permits carriers from different stations to use the same transmission equipment by using a wider bandwidth than the individual carriers, and on.

Code division multiple access (CDMA) is a form of spread spectrum communications that is being used for, among other applications, some second-generation cellular phone systems (others use TDMA). The method is also known as S-CDMA, where the S stands for synchronous.

System performances of optical space code-division multiple-access-based fiber-optic two-dimensional parallel data link Moriya Nakamura and Ken-ichi. K. Tsukamoto, T. Higashino, T. Nakanishi, S. KomakiDirect optical switching code-division multiple-access system for fiber-optic radio highway networks J Lightwave Technol, 21 (), pp.

Google Scholar. Wavelength-division multiple access (2) Fiber used in traditional architec- tures. The outstanding example of this generation is the point-to-point inter- city trunk that is improved by upgrad- ing single-copper or microwave-radio connections to fiber connections.

It al- lows you to use higher and higher speed electronic time-division multiplexing. Robert M. Gagliardi's 97 research works with 1, citations and 1, reads, including: Architecture, design, and numerical simulation of a code/pulse-position-swapping (CPPS) direct translating.

In this chapter, we discuss using fiber-optic-based techniques to defend against threats in the network, including optical encryption, optical code-division multiple access (CDMA), optical key.

Fiber-Optic Code Division Multiple Access: Multi-Class Optical Orthogonal Codes, Optical Power Control, and Polarization Encoding Manuscript submitted Manuscript revised Date of the defence Ap which users' fiber lengths and data rates are not equal.

We consider the case of optically amplified network with. Optical transmission systems 4 Optical networks 14 Access networks 23 Local area networks 29 Problems 30 Part I 31 2 Optical multiple access systems 33 Passive optical network 33 Technology roadmap 33 Current PON 34 Practical aspects 41 Multiple access techniques 47 Time division multiple access Optical code division multiple access (CDMA) communication systems are a viable choice for local area optical networks because of their unique attributes of optical processing, asynchronous transmission, high information security, and the capability for multiple access, which results in high overall data transmission rates Code Division Multiple Access fiber optic networks.[1] Transmission rates are defined by rate of the bitstream of the digital signal and are designated by hyphenation of the acronym OC and an integer value of the multiple of the basic unit of rate, e.g., OC (ISDN) for carrying multiple DS0 voice and data transmissions between the.

Here is a quick summary of data center cabling options. Coax and AOCs are used for short (!fiber can work over a range of down to m depending on the type of fiber chosen but is very limited on.

Kwong WC et al, Performance Comparison of Asynchronous and Synchronous Code-Division Multiple-Access Techniques for Fiber-Optic Local Area Networks, IEEE Trans Comm 39(11), –34, November CrossRef Google Scholar.

Types. Multiple variable bit rate digital bit streams may be transferred efficiently over a single fixed bandwidth channel by means of statistical is an asynchronous mode time-domain multiplexing which is a form of time-division multiplexing.

Digital bit streams can be transferred over an analog channel by means of code-division multiplexing techniques such as frequency. This study proposes a spectral-amplitude-coding optical code-division multiple-access (SAC-OCDMA) framework for accessing the vibration frequency of a test object by using a Michelson interferometer vibration sensor (MIVS).

Each sensor node possesses an individual signature codeword, and liquid crystal spatial light modulator (LC-SLM) encoders/decoders (codecs) are adopted to provide excellent. In optical code division multiple access system, the cost is one of the most decisive factors. Therefore, the main factors influence its transmission performance in optic–fiber networks.

The results are obtained using Optisystem (version 7) software from Optiwave. and then applied. munication at the same data rate [1]. Optical code division multiple access (OCDMA) is one of the upcoming technologies for future multiple access networks along with WDMA and OTDMA.

OCDMA is a spreading technique based on the concept of assigning codes to each user in a fiber optic communication net-* Corresponding author. work [2,3].

OPEN. The fourth generation of fiber optic systems made use of optical amplifiers as a replacement for repeaters, and utilized wavelength division multiplexing (WDM) to increase data rates.

Bytransmission of oKm at a data rate of 5Gigabits/second had been demonstrated using submarine cables [7]. Chapter 5: Making Connections Efficient: Multiplexing and Compression Introduction: Multiplexing is the technique of transmitting multiple signals over a single medium.

For multiple signals to share one medium, the medium need to be “divided” to give each signal a portion of the total bandwidth. Multiplexing can make a communications link, or connection, more efficient by.

Get this from a library. Optical code division multiple access: a practical perspective. [Ken-Ichi Kitayama] -- "A comprehensive guide to optical fiber communications, from the basic principles to the latest developments in OCDMA for Next-Generation Fiber-to.

CDMA, Fiber Optics, Multiple Access, Spread Spectruum, Delay Lines ABSTRACT (Continue on reverse if necessary and identify by block number) This thesis investigated the feasibility of implementing a code division multiple access (CDMA) data link that employs fiber-optic.

The multiplexing of multiple data streams onto a single fiber-optic cable through the use of lasers of varying wavelengths. The binary sequences assigned to devices so that they can perform code division multiple access. A compression technique applied to audio and video files in which aspecs of the data with characteristics that are.

• Access Points- nodes for accessing and sending data to the ring. • WDM MAN – In this architecture Access Points are connected in a ring topology. Wavelength Division Multiplexing approach is used to route signals on the MAN.

A rapid tunable (data onto the network at an Access. Defined by ITU-T G as “extended” for wavelengths between and nm This band includes the high OH peak in single-mode fibers G D fiber is designed for transmission within the extended band In FTTx systems, the term can be confused with the enhancement band, which the ITU-T G and G PON FTTx standards define as the wavelengths between and nm for RF.

: Emerging Trends in ICT Security: Chapter Secure Communication in Fiber-Optic Networks (Emerging Trends in Computer Science and Applied Computing) eBook: Ben Wu, Bhavin J. Shastri, Paul R. Prucnal: Kindle Store. Sometimes it has been combined with access schemes such as wavelength division multiplexing (WDM) to meet the requirements of future optical access networks [].

In [9] the use of OFDM in combination with electrical code division multiple access (CDMA) scheme was proposed in fiber optic communications for the first time. The proposed. The success of code division multiple access techniques in providing secure and spectrally efficient communication can be readily seen in their deployment in wireless networks around the globe.

The optical analog, OCDMA, has the potential to increase the capacity and security of existing wavelength division multiple access (WDMA) networks, but. 5 data Bits, 6 transmission Bits QAM 16 (points) Quadrature Amplitude Modulation A/D Code Division Multiple Access (Cellular, IS) CDPD Cellular Digital Packet Data CEBus Fiber Optic Inter Repeater Link (Ethernet - IEEE c.3d) FOR.These tests determine the transmission characteristics of the fiber optic transmitters and receivers and the effects of data rate, bit pattern sensitivity, and vestigial optical energy on the performance of these devices.

Tests were also performed to evaluate the capability of fused biconical couplers to Function properly at these high data rates.