18 Gchips/s Electronic CDMA for Low-Cost Optical Access Networks

Rosas-Fernandez, J.B.; Ingham, J. D.; Penty, R.V.; White, I.H.

doi:10.1109/jlt.2008.2010414

Cited by 25 publications

(16 citation statements)

References 15 publications

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“…Of course a more complex synchronization scheme will need to be implemented to achieve this performance. This represents a 2.5-fold improvement over the previous demonstration of NRZ-ECDMA [3] without compromising any other performance.…”

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confidence: 68%

“…This represents a 2.5-fold improvement over previous NRZ-ECDMA results [3]. The electrical FIR TF used allows the required ADC/DAC to be simpler as the necessity for high cost due to higher bandwidth is removed.…”

mentioning

confidence: 89%

“…Here most all-optical CDMA (OCDMA) solutions proposed are likely to be costly as they use dedicated optical encoders and decoders, complex sources and highpower nonlinear optics for optical thresholding [2]. Hence ECDMA which realizes CDMA coding and decoding in the analogue domain has been proposed [3] which can decrease the bandwidth requirement of the analogue-todigital converter or digital-to-analogue converter (ADC/DAC) greatly. This also can potentially be a low cost, low power consumption and low complexity solution.…”

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confidence: 99%

“…In addition, the system coding and decoding processes have the potential to improve receiver sensitivity and increase power budgets due to coding gain, which potentially allows optimization of existing infrastructure, simplifies network management and further reduces the cost of an upgraded PON system. Recently, ECDMA with chip rates up to 18 Gchip/s were implemented using electronic finite impulse response (FIR) transversal filters (TF) with 1.25 Gb/s Non-return-to zero (NRZ) modulation [3]. However, as the data rates increase, the computational requirements involved in electronic dispersion compensation for such serial modulation format become very complicated.…”

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confidence: 99%

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First demonstration of OFDM ECDMA for low cost optical access networks

Guo

Wang

et al. 2015

Opt. Lett.

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Received Month X, XXXX; revised Month X, XXXX; accepted Month X, XXXX; posted Month X, XXXX (Doc. ID XXXXX); published Month X, XXXX We demonstrate for the first time an analogue orthogonal frequency division multiplexing (OFDM) based electrical code division multiplexing access (ECDMA) passive optical network (PON) for the next-generation access applications. Advantages of the system include low cost, high capacity and enhanced spectral efficiency. A proof-of-principal 16 QAM OFDM ECDMA PON downlink experiment is used to show the transmission of an aggregate data rate of 24.8 Gb/s within a 8-user system. Transmission is achieved over 25 km of single-mode telecommunications fibre (SMF) with negligible dispersion and crosstalk penalties.

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confidence: 68%

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confidence: 89%

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confidence: 99%

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confidence: 99%

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First demonstration of OFDM ECDMA for low cost optical access networks

Guo

Wang

et al. 2015

Opt. Lett.

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“…CDMA based passive optical networks have already been demonstrated for commercial fiber-to-the-home applications. A bidirectional CDMA PON that supports 32 users at 62.5 Mbit/s over 100 km has been reported in [31], while a faster CDMA PON system that can potentially support 64 users at 280 Mbit/s over 10 km has been demonstrated in [32]. The previous two systems were implemented with ASICs but an FPGA based CDMA PON with potential to support 64 users at 10 Mbit/s over 10 km has been reported in [33].…”

Section: Future Developmentsmentioning

confidence: 99%

A Fully Bidirectional Optical Network With Latency Monitoring Capability for the Distribution of Timing-Trigger and Control Signals in High-Energy Physics Experiments

Papakonstantinou

Soós

Papadopoulos

et al. 2011

IEEE Trans. Nucl. Sci.

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Abstract-The present paper discusses recent advances on a Passive Optical Network inspired Timing-Trigger and Control scheme for the future upgrade of the TTC system installed in the LHC experiments' and more specifically the currently known as TTCex to TTCrx link. The timing PON is implemented with commercially available FPGAs and 1-Gigabit Ethernet PON transceivers and provides a fixed latency gigabit downlink that can carry level-1 trigger accept decisions and commands as well as an upstream link for feedback from the front-end electronics.Index Terms-Field-programmable gate arrays and gigabit links, fixed and low latency serial links, passive optical networks in high energy physics experiments, timing trigger and control applications.

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Performance of a noncoherent decoder for spectral amplitude‐coding electronic‐code division multiple access

Aguilar‐Torrentera

Galván-Tejada

Orozco-Lugo

et al. 2020

Micro & Optical Tech Letters

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The performance of a noncoherent decoder based on a pair of distributed-based transversal filters architecture is reported. Analysis based on experimental results validates the decoder as a proof-of-concept using microwave integrated circuits. Front-end transversal filters are designed with large degree of freedom to generate and correlate temporal phase-coded signals. Receiving functions are aligned with slots of spectrally encoded channels to make available spectral amplitude-coding electronic-code division multiple access. Noncoherent ultra-wideband receiver concepts are applied to model the decoder synchronized to shot noise pulse trains. The despreading operation involves capturing sufficient amount of energy to demodulate matched and unmatched users. Electronic transversal filters implemented with a suitable number of taps allow bipolar detection of concurrent users whereas the noncoherent reception of energy of sub-bands is fundamental to achieve orthogonality among channels, as we show in this article.

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18 Gchips/s Electronic CDMA for Low-Cost Optical Access Networks

Cited by 25 publications

References 15 publications

First demonstration of OFDM ECDMA for low cost optical access networks

First demonstration of OFDM ECDMA for low cost optical access networks

A Fully Bidirectional Optical Network With Latency Monitoring Capability for the Distribution of Timing-Trigger and Control Signals in High-Energy Physics Experiments

Performance of a noncoherent decoder for spectral amplitude‐coding electronic‐code division multiple access

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