Recent Progress in Optical Access and Home Networks: Results from the ALPHA Project

Popov, M. M.

doi:10.1364/ecoc.2011.we.7.c.2

Cited by 3 publications

(5 citation statements)

References 8 publications

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“…which is similar to the noise variance in (20). The simulation results in [29] show that this improved PN correlation based estimator can reach the Cramer-Rao bound of a training sequence based channel estimation.…”

Section: Improved Pn Sequence Based Estimationmentioning

confidence: 63%

“…The noise variance of w equal to σ 2 /L pn is related to σ 2 , the normalized received noise variance and L pn the PN length. The interference and noise terms in (20) cause the residual error from PN after the equalization. Finally, the estimated CFRH k can be obtained bỹ…”

Section: Pn Sequence Based Estimationmentioning

confidence: 99%

“…When the channel length L is known by the receiver, the interference in (20) can be easily canceled. From (20), the sum of the L estimated CIR is represented as…”

Section: Improved Pn Sequence Based Estimationmentioning

confidence: 99%

“…In the case of PN sequence based channel estimation, the low performance and the increased MSE at low frequencies of "PN-1023" is mainly due to the interference shown in (20). With the help of improved PN sequence based channel estimation, the MSE is significantly reduced, which is shown by the curve "PN-1023 Imp."…”

Section: "mentioning

confidence: 99%

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Hybrid PN-ZP-DMT Scheme for Spectrum-Efficient Optical Communications and Its Application to SI-POF

Peng

Hélard

Haese

et al. 2014

J. Lightwave Technol.

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In this paper, a novel discrete multi-tone (DMT) scheme is proposed for optical communications. Instead of the traditional cyclic prefix, a hybrid structure of pseudonoise (PN) sequence and zero-padding (ZP) sequence is proposed to serve as guard interval for the DMT transmission in order to achieve higher spectrum efficiency. The proposed PN-ZP-DMT scheme directly reuses PN sequence for channel estimation. The proposed PN-ZP-DMT scheme is then applied to plastic optical fiber (POF) transmission systems. Compared to the classical DMT block-based channel estimation and time-frequency pilot-based channel estimation, the PN sequence-based channel estimation improves both performance and spectrum efficiency in POF. The optimal selection of PN sequence length is investigated. Simulation results show that the PN sequence-based channel estimation can approach the optimal performance. Moreover, some practical features of PN-ZP-DMT transmission over POF such as system complexity and influence of time synchronization errors are studied. Finally, a PN-ZP-DMT transmission with 1.49-Gbps net rate is implemented in the low-cost 50 m step index-POF system which eventually proves the effectiveness of the proposal. Index Terms-Channel estimation discrete multitone (DMT), OFDM, optical communications, PN-ZP-DMT, POF, short-range, visible light communications (VLC).

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Section: Improved Pn Sequence Based Estimationmentioning

confidence: 63%

Section: Pn Sequence Based Estimationmentioning

confidence: 99%

“…When the channel length L is known by the receiver, the interference in (20) can be easily canceled. From (20), the sum of the L estimated CIR is represented as…”

Section: Improved Pn Sequence Based Estimationmentioning

confidence: 99%

Section: "mentioning

confidence: 99%

See 2 more Smart Citations

Hybrid PN-ZP-DMT Scheme for Spectrum-Efficient Optical Communications and Its Application to SI-POF

Peng

Hélard

Haese

et al. 2014

J. Lightwave Technol.

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“…1 mm PMMA POFs own the advantages of high robustness, easy coupling and low maintenance, which is considered to be a cost-effective and do-it-yourself solution for short-range communications and in particular suitable for highspeed communications. Thus POF is studied in the seventh framework programme (FP7) of the European ALPHA Project [2]. An investigation of cost optimization for in-building networks shows that, in a foreseeable future, POF could be the most economic solution for home networking, compared to traditional copper based category 5 (CAT-5E) solution and optical single-mode fiber (SMF) and multi-mode fiber (MMF) solutions [3].…”

Section: Introductionmentioning

confidence: 99%

Optimization of multi-band DFT-spread DMT system for polymer optical fiber communications

Peng

Hélard

Haese

2013

2013 IEEE International Conference on Communications (ICC)

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Recently, polymer optical fiber (POF) became a popular solution for the indoor communications. In this paper, a multi-band discrete-Fourier-transform spread (MB-DFT-S) discrete multi-tone (DMT) system is proposed to study and optimize in terms of POF communications. A joint optimization of used subcarrier number, used bandwidth and multi-band number is investigated. The transmission of MB-DFT-S DMT over 50 m POF link is implemented. Both theoretical and experimental results demonstrate that optimized MB-DFT-S DMT system outperforms the original DMT and DFT-S DMT systems, which means that it is a promising technique for future POF transmission systems. I.

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Plastic Optical Fibers and Gb/s Data Links

Koike

Gaudino

2013

Optical Fiber Telecommunications

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Recent Progress in Optical Access and Home Networks: Results from the ALPHA Project

Cited by 3 publications

References 8 publications

Hybrid PN-ZP-DMT Scheme for Spectrum-Efficient Optical Communications and Its Application to SI-POF

Hybrid PN-ZP-DMT Scheme for Spectrum-Efficient Optical Communications and Its Application to SI-POF

Optimization of multi-band DFT-spread DMT system for polymer optical fiber communications

Plastic Optical Fibers and Gb/s Data Links

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