Synchronous digital transmission systems based on CCITT SDH standard

Kasai, Hiroyuki; Murase, T.

doi:10.1109/35.58886

Cited by 17 publications

(4 citation statements)

References 6 publications

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“…The CNR of the system without amplifier has the same expression in (1) with P s = P jn (i. e. T|J = G = η 0 = 1) for (2)- (6). Thus J CNR (15) which is simply the improvement due to the gain of the optical amplifier offset by the additional spontaneous emission noise. In Section 5, a numerical example will justify this approximation.…”

Section: Cnr Improvementmentioning

confidence: 97%

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M-ary QAM-SCM-IM/DD Fiber-optic System with Optical Amplifier and Coding

Wu¹,

Lee²

2000

Journal of Optical Communications

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For a fiber-optic M-ary QAM-SCM-IM/DD system, the receiver requires high carrier-to-noise ratio to get a reasonable performance. A performance analysis of the M-ary QAM-SCM-IM/DD system employing the optical amplifier is presented. We analyze the advantages of using the optical amplifier in terms of carrier-to-noise ratio, receiver sensitivity, and the channel transport capability. Then the benefits of applying error control code are also investigated. It is found that coding can increase the total channel number and eliminate error floor under a given bit error rate and receiver sensitivity. In addition, the optimal modulation index per channel is derived.

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Section: Cnr Improvementmentioning

confidence: 97%

“…In practical applications, radio equipment using VLSI technology for BCH codes has been installed [15,16].…”

Section: The Benefits Of Codingmentioning

confidence: 99%

M-ary QAM-SCM-IM/DD Fiber-optic System with Optical Amplifier and Coding

Wu¹,

Lee²

2000

Journal of Optical Communications

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“…Furthermore, the time delay differences (1, and ~2 ) due to the path differences are assumed to be very small, so that 0 = 0 by Eq. (5). Signal fading characteristics are assumed to follow the two-wave interference model, and the relative delay difference z is normalized to the clock period (T), resulting in r/T = 0.1.…”

Section: Theoretical Investigationmentioning

confidence: 99%

“…According to Eqs. ( 5 ) and (6). {A2(V)}Z(H2V)IZ amplitude and time delay difference 7 can be expressed using the two-wave model of the present interference.…”

Section: Theoretical Investigationmentioning

confidence: 99%

Performance of a transversal equalizer for self‐interference passing adjacent channels

Kagami

Watanabe

Ohtsuka

1993

Electron. Comm. Jpn. Pt. I

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Nonregenerative repeating systems on digital microwave radio have the advantage of network flexibility and low-cost transmission. This paper describes a means of compensating self-interference passing adjacent channels (S-PAC). which degrades the transmission performance. This interference is specific to nonregenerative repeating systems. A transversal equalizer with multitaps is discussed as a countermeasure against S-WAC. Bit error rates (BER) and signatures are presented theoretically and experimentally as a parameter of hop numbers.Key words : N on regene rat i ve repeating ; se I f-i nterference passing adjacent channels (S-IPAC); transversal equalizer. 72ISSN8756-662 1 /93/00 1 1 -0O72 0 1994 Scnpta Technica, Inc.

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Network planning based on virtual path bandwidth management

Logothetis

Kokkinakis

1995

Int J Communication

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Periodical performance evaluation and adaptive resource assignment, already proposed as performance‐oriented management, seems to be the most suitable strategy for network planning under demand uncertainty. In this paper, we exploit the inherent capability of ATM networks to rearrange dynamically the already installed resources, and propose performance‐oriented management combined with virtual path bandwidth (VPB) control for the planning of the extensions of bandwidth capacities of virtual paths (VPs) and transmission links of the network. We define a large network optimization problem and solve it by a rigorous, analytical procedure. The optimization model comprises specific requirements of the network‐planning problem and a bandwidth distribution scheme ensuring network reliability. We reveal the efficiency of the proposed scheme by applying it on a model network, considering two realistic case‐studies of network‐traffic evolution. We show that in the presence of VPB control: (a) the initial distribution of the total bandwidth to VPs is of no importance, since it can be adaptively rearranged according to the offered traffic, (b) the network is well used and bandwidth investment could be saved, and (c) whenever additional bandwidth must be installed in VPs which have an unanticipated bad grade‐of‐service, time savings result. We present the network performance in detail, in figures, and compare this with the performance of the network in the absence of VPB control.

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Synchronous digital transmission systems based on CCITT SDH standard

Cited by 17 publications

References 6 publications

M-ary QAM-SCM-IM/DD Fiber-optic System with Optical Amplifier and Coding

M-ary QAM-SCM-IM/DD Fiber-optic System with Optical Amplifier and Coding

Performance of a transversal equalizer for self‐interference passing adjacent channels

Network planning based on virtual path bandwidth management

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