Performance Improving of OCDMA System Using 2-D Optical Codes With Optical SIC Receiver

In this paper, we propose a modulation technique for passive optical networks that harnesses two-dimensional prime hop system optical code division multiplexing access (OCDMA) and optical orthogonal frequency-division multiplexing (OFDM) for intensity modulation with direct-detection (IMDD) to enhance users' signal capacity in a cost-effective manner. The theoretical analysis is built from an analytical formula that takes into account both multiple-access interference and photodetector noise. Results show that OFDM-OCDMA with multiple users has similar performance to single-user conventional OOFDM for low transmitted powers.

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“…In the OCDMA encoder, the optical code of the k th user is known as a code signature ck (t) which can be expressed as [18]:…”

Section: System Architecturementioning

confidence: 99%

Performance evaluation of an IMDD optical OFDM-CDMA system

2018

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“…These labels have shorter length, so they reduce the complexity of optical nodes. Spectral amplitude coding (SAC) is used as optical labels because they can be constructed easily and have low system cost [4], [5]. Each node is assigned a particular code as label.…”

Section: Introductionmentioning

confidence: 99%

Orthogonal stacked composite M-sequence labels for quick packet routing over optical MPLS network

Meng

Chen

Huang

et al. 2015

2015 IEEE 28th Canadian Conference on Electrical and Computer Engineering (CCECE)

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In this paper, we construct a composite label sets for optical multi-protocol label switching (MPLS) network. Relatively prime lengths maximal-length (M-sequence) codes are taken to compose into spectral-amplitude coding (SAC) labels. These composite M-labels possess good orthogonality and are compatible with packet labels stacking. With correlation subtraction scheme in packet routing node, local node label can be identified from the stacked labels. The composite M-labels are coded with arrayed-waveguide gratings (AWGs) with small number of input-output ports to reduce hardware requirement. Compared with conventional M-sequence labels, composite M-labels behave more flexibility on routing data packets. The proposed composite M-labels coding can support optical packet switching network (OPS) with fast label processing.

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“…Therefore, numerous OCDMA receivers have been proposed for reducing the MAI, including the conventional correlator (CCR), the chip-level detector as well as the parallel and serial interference cancellation (PIC and SIC) schemes [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Chip-interleaved optical code division multiple access relying on a photon-counting iterative successive interference canceller for free-space optical channels

Zhou¹,

Zheng²,

Zhang³

et al. 2013

Opt. Express

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In this paper, we design a novel Poisson photon-counting based iterative successive interference cancellation (SIC) scheme for transmission over free-space optical (FSO) channels in the presence of both multiple access interference (MAI) as well as Gamma-Gamma atmospheric turbulence fading, shot-noise and background light. Our simulation results demonstrate that the proposed scheme exhibits a strong MAI suppression capability. Importantly, an order of magnitude of BER improvements may be achieved compared to the conventional chip-level optical code-division multiple-access (OCDMA) photon-counting detector.

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Performance Improving of OCDMA System Using 2-D Optical Codes With Optical SIC Receiver

Cited by 28 publications

References 22 publications

Performance evaluation of an IMDD optical OFDM-CDMA system

Performance evaluation of an IMDD optical OFDM-CDMA system

Orthogonal stacked composite M-sequence labels for quick packet routing over optical MPLS network

Chip-interleaved optical code division multiple access relying on a photon-counting iterative successive interference canceller for free-space optical channels

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