Using spread-spectrum in a high-capacity fiber-optic local network

Foschini, G.J.; Vannucci, G.

doi:10.1109/50.4014

Cited by 89 publications

(22 citation statements)

References 8 publications

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“…Optical Code Division Multiple Access (CDMA) has been proposed as an alternative to frequency and time based multiple access methods for the future high speed fiber optic networks [1,2,3,4,5,6]. A typical fiber-optic CDMA system is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Optical CDMA via temporal codes

Azizoglu

Salehi

1992

IEEE Trans. Commun.

200

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We provide an analysis to the performance of Optical Orthogonal Codes(OOC) in an Optical Code Division Multiple Access(CDMA) network by considering the probability distribution of the interference patterns. We show that the actual performance is close to a previous estimate. We also consider a less structured temporal code in which the code words are allowed to overlap at two pulse positions. We obtain the bit error probability for this class of codes for two cases: with and without optical hard-limiting at the receivers. We show that this code may increase the number of users in the network considerably without a significant loss in the performance. We also provide a simple partial construction scheme for this code.

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Section: Introductionmentioning

confidence: 99%

Optical CDMA via temporal codes

Azizoglu

Salehi

1992

IEEE Trans. Commun.

200

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“…This approach was first investigated by Foschini and co-workers using bipolar codes [97][98][99][100]. Their work claims that such a system could cover the needs of medium rates (up to 100 Mb/s) networks for hundreds of network subscribers and tens of active users [97].…”

Section: A Narrow Optical Passband Filteringmentioning

confidence: 98%

Optical Fiber Code Division Multiple Access Networks: A Review

Karafolas

Uttamchandani

1996

Optical Fiber Technology

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“…Therefore, the peak to background contrast ratio R is given by The effect of coding on the intensity autocorrelation is illustrated in Fig. 6, which shows examples of g ' 2 ' ( 7 ) obtained for various code lengths and degrees of coding.…”

Section: Nomentioning

confidence: 99%

Coherent ultrashort light pulse code-division multiple access communication systems

Salehi¹,

Weiner²

1990

J. Lightwave Technol.

430

147

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We analyze a new technique for encoding and decoding of coherent ultrashort light pulses. In particular, we discuss the temporal and statistical behavior of pseudonoise bursts generated by spectral phase coding of ultrashort optical pulses. Our analysis is motivated by recent experiments that demonstrate high resolution spectral phase coding of picosecond and femtosecond pulses and suggest the possibility of ultrahigh speed code-division multiple access (CDMA) communications using this technique. We trace the evolution of coherent ultrashort pulses into low intensity pseudonoise bursts as a function of the degree of phase coding. For random coding we find that the encoded pulse obeys Gaussian statistics and that the intensity probability distribution function is a negative exponential. These results are utilized to analyze the performance of a proposed CDMA optical communications system based upon encoding and decoding of ultrashort light pulses. We derive the bit error rate (BER) as a function of data rate, number of users, and receiver threshold; and we discuss the performance characteristics for a variety of system parameters. We find that performance improves dramatically with increasing code length. Lltrashort light pulse CDMA could provide tens to hundreds of users with asynchronously multiplexed, random access to a common optical channel.

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Using spread-spectrum in a high-capacity fiber-optic local network

Cited by 89 publications

References 8 publications

Optical CDMA via temporal codes

Optical CDMA via temporal codes

Optical Fiber Code Division Multiple Access Networks: A Review

Coherent ultrashort light pulse code-division multiple access communication systems

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