On error-correction coding for CDMA PON

Lundqvist, Henrik; Karlsson, Gunnar

doi:10.1109/jlt.2005.850776

Cited by 34 publications

(21 citation statements)

References 30 publications

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“…These gains in the SNIR for FEC-LDPC scheme are obtained through the FEC encoding/decoding process that results in the additional power consumption and increase in the required bandwidth. The SNIR gain for FEC-LDPC scheme could be obtained analytically with (17) resulting in approximately 10.09, 9.95 and 9.81 for 8, 16 and 32 nodes, respectively. Therefore, the SNIR gain for FEC-LDPC scheme could be forested analytically or numerically with DPCA with agreement in the results.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The first and second FEC generations are not efficient to correct errors in non-coherent 2D OCDMA [16,17]. The non-coherent OCDMA systems are not symmetrical due to the asymmetry of MAI and noise [17].…”

Section: Introductionmentioning

confidence: 99%

“…The non-coherent OCDMA systems are not symmetrical due to the asymmetry of MAI and noise [17]. Besides, when an optimal threshold is chosen, it is not clear whether 1's or 0's will suffer from the highest error probability.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, when an optimal threshold is chosen, it is not clear whether 1's or 0's will suffer from the highest error probability. It usually changes, depending on the number of active users and noise distribution [17]. Furthermore, in order to enhance the performance of the error-correction coding block, it is necessary to take into account the channel unbalance and the specific MAI distribution at the decoder side.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, in order to enhance the performance of the error-correction coding block, it is necessary to take into account the channel unbalance and the specific MAI distribution at the decoder side. Moreover, there is a significant improvement when FEC based on soft-decision codes are adopted in OCDMA networks [16][17][18]. The efficacy of FEC schemes for energy-efficient transmission mode in OCDMA networks has not been investigated properly in terms of energy consumption estimation for performing encoding and decoding operations.…”

Section: Introductionmentioning

confidence: 99%

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Energy efficiency in optical CDMA networks with forward error correction

Durand

Abrão

2015

Photon Netw Commun

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In this work, we investigate the energy efficiency in optical code division multiplexing access (OCDMA) networks with forward error correction (FEC). We have modeled the energy efficiency considering the capacity of information transmitted and the network power consumption. The proposed network power consumption model considers the optical transmitter, receiver, optical amplifiers, FEC and network infrastructure as encoders, decoders, star coupler and network control in the overall optical power network consumption balance. Furthermore, an expression relating the signal-to-noise-plus-interference ratio gain for forward error correction with low-density parity-check code scheme considering the power consumption and bandwidth occupancy has been derived. Numerical results for OCDMA networks with aggregated FEC procedure have revealed the viability of the FEC deployment aiming to increase the overall energy efficiency of OCDMA networks.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energy efficiency in optical CDMA networks with forward error correction

Durand

Abrão

2015

Photon Netw Commun

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Performance of OCDMA system with FEC based on interference statistical distribution analysis

Sahuguède

Julien-Vergonjanne

Cances

2009

Trans Emerging Tel Tech

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International audienceThe optical code division multiple access (OCDMA) technique has been investigated for several years as a promising alternative to provide multiple access in high speed optical networks. However, due to the use of binary on off keying (OOK) modulation, an inherent main performance limitation is multiple access interference (MAI), following a specific distribution. In order to reduce errors induced by MAI, it is necessary to take into account this specific statistic when applying forward error correction (FEC) with soft decision decoding. In this paper, we analyse the MAI distribution in order to determine FEC soft decoding calculation rules. The study is performed for a low density parity check (LDPC) code scheme over an OCDMA system using two-dimensional (2-D) OCDMA spreading codes. The a priori information required for soft decoder initialisation is calculated according to the specific OCDMA channel statistic. The enhancement provided by the decoding algorithm adaptation confirms that it is important to take into account the specific MAI distribution as described in this paper. Finally, we show that, despite the loss of available data rate linked to the addition of redundancy, the data rates per user can significantly be increased thanks to this efficient error correction scheme. Copyright © 2009 John Wiley & Sons, Ltd

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Performance improvement of spectral amplitude coding-optical code division multiple access systems using NAND detection with enhanced double weight code

Ahmed

Aljunid

Ahmad

et al. 2012

OPT REV

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The bit-error rate (BER) performance of the spectral amplitude coding-optical code division multiple access (SAC-OCDMA) system has been investigated by using NAND subtraction detection technique with enhanced double weight (EDW) code. The EDW code is the enhanced version of double weight (DW) code family where the code weight is any odd number and greater than one with ideal cross-correlation. In order to evaluate the performance of the system, we used mathematical analysis extensively along with the simulation experiment. The evaluation results obtained using the NAND subtraction detection technique was compared with those obtained using the complementary detection technique for the same number of active users. The comparison results revealed that the BER performance of the system using NAND subtraction detection technique has greatly been improved as compared to the complementary technique. #

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On error-correction coding for CDMA PON

Cited by 34 publications

References 30 publications

Energy efficiency in optical CDMA networks with forward error correction

Energy efficiency in optical CDMA networks with forward error correction

Performance of OCDMA system with FEC based on interference statistical distribution analysis

Performance improvement of spectral amplitude coding-optical code division multiple access systems using NAND detection with enhanced double weight code

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