Exploració per autor "Prat Gomà, Josep Joan"
Ara es mostren els items 78-97 de 141
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L-Band In-Line Remote Amplification for an Extended WDM/PON Ring Architecture
(IEEE Press. Institute of Electrical and Electronics Engineers, 2009-06-28)
Text en actes de congrés
Accés obertIn this paper, a study on a fully passive WDM/PON ring architecture which reaches 19 km distance, while serving more than 1000 users with symmetric several hundred Mbit/s per user is presented. The design is based on ... -
Laser linewidth requirements for remote heterodyne OFDM based PON scenario
(IEEE Press and Wiley, 2004)
Text en actes de congrés
Accés restringit per política de l'editorialThe relationship between the FFT size, modulation format and laser linewidth is studied in a remote heterodyne scenario where phase noise is compensated by pilot tones. Results indicate that the laser linewidth tolerance ... -
Layer 2 redesign for Metro-Access next generation PON
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialNecessary modifications and extensions into Layer 2 of the actual PON access are necessary in order to meet new requirements from services providers and users. We propose a flexible Transmission Convergence (TC) Layer ... -
Limitation to wdm transmission distance due to cross-phase modulation induced spectral broadening in dispersion compensated standard fiber systems
(1999-08)
Article
Accés obertWe describe large spectral broadening due to the interaction of cross-phase modulation/self-phase modulation and fiber dispersion, and explain its contribution to the penalties in standard fiber systems pre- and postcompensated ... -
Low cost homodyne transceiver for UDWDM access networks
(2009)
Text en actes de congrés
Accés restringit per política de l'editorialWe propose and demonstrate a DPSK homodyne architecture based on a simple phase-diversity set-up with analog processing. Due to its spectral properties, it remarkably increases the phase noise tolerance of more conventional ... -
Low cost solutions implementing ultra-dense-WDM in access
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialA high-level optical access network based on coherent technology supporting ultra-dense Wavelength Division Multiplexing (WDM) is developed in the EU FP7 COCONUT project (COst-effective COherent ultra-dense-WDM-PON for ... -
LTE-advanced carrier aggregation supporting fully standard 3GPP MIMO by optical polarization multiplexing
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialLTE-A carrier aggregation investigation demonstrates successful 2×2 MIMO Pol-Mux RoF transmission of five LTE-A carriers modulated in 16QAM in 25 km, three LTE-A carriers in 75 km and an LTE carrier in 100 km SSMF -
LUT-Free carrier recovery for intradyne optical DPSK receivers in UDWDM-PON
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés
Accés restringit per política de l'editorialWe present an LUT-free feed-forward carrier recovery architecture in intradyne optical DPSK receivers that reduces ~41% DSP hardware resources and 61% required process clocks with 85% less power consumption in real-time ... -
LUT-free carrier recovery for intradyne optical DPSK receivers in udWDM-PON
(Institute of Electrical and Electronics Engineers (IEEE), 2019-03-15)
Article
Accés obertWe present a lookup table (LUT)-free carrier recovery architecture for intradyne optical DPSK receivers that reduce the required digital signal processing hardware resources, power consumption as well as total process ... -
Minimum channel spacing in an ofdm cpfsk optical coherent system
(1998-03)
Article
Accés restringit per política de l'editorialChannel spacing in optical frequency-division multiplexed (OFDM) coherent optical systems with continuous-phase frequency-shift-keying (CPFSK) is obtained both theoretically and experimentally. The bit error ratio is derived ... -
Modified duobinary polarization-shift keying transmission scheme
(2003)
Comunicació de congrés
Accés restringit per política de l'editorialA new version of duobinary polarization-shift keying scheme is proposed. The relocation of the duobinary filter at the receiver side and the optimization of both transmitter and receiver electrical filters offer a receiver ... -
Monolithically integrated dual-output DEML for full duplex DPSK-ASK and DPSK-SSB ONU in ultra-dense channel spaced access network
(Institute of Electrical and Electronics Engineers (IEEE), 2016-04)
Article
Accés obertUltra-dense access network attracts people's attention recently; however, until now it is difficult to implement it commercially owing to cost, footprint, and the traditional complexity of coherent receiver. Single laser, ... -
Multilevel direct DFB phase modulation in 6.25 GHz spectrally spaced UDWDM PONs
(2016)
Presentació
Accés restringit per política de l'editorialDirect phase modulation of DFB is demonstrated with DPSK, DQPSK and Duobinary modulation formats and detected with an intradyne receiver based on a 120-degree hybrid. The system is tested in a 50 km fibre link with 6.25 ... -
Network dimensioning for a TDM-PON deployment Single-fibre single-wavelength-reuse based on reflective ONUs
(Institute of Electrical and Electronics Engineers (IEEE), 2012)
Text en actes de congrés
Accés restringit per política de l'editorialThe network dimensioning for a TDM-PON deployment based on reflec tive ONUs is presented in order to optimize number of users for efficient exploitation. Due to wavelength reuse, the study is focused on the power budget ... -
OFDM-PON performance with limited quantization
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialA study of digital-analogue converter quantization effects and the minimum resolution required in an OFDMA-PON is carried out with 10 Gbps transceivers. The PON is based on DD over a maximum of 100 km fibre length. Results ... -
On an ONU for full-duplex 10.5 Gbps/lambda with shared delay interferometer for format conversion and chirp filtering
(2011)
Text en actes de congrés
Accés restringit per política de l'editorialChirped IRZ downstream is used together with a delay interferometer and a RSOA at a low complexity ONU for full-duplex 10.5Gbps transmission on a single wavelength, supported by modulation format conversion and optical ... -
ONU optimal gain and position of the distribution element in Rayleigh-limited WDM and TDM PONs with reflective ONU
(Institute of Electrical and Electronics Engineers (IEEE), 2012)
Text en actes de congrés
Accés restringit per política de l'editorialThe influence of the distribution element position in PONs is reported. Best Crosstalk-to-Signal ratio (C/S) is achieved if it is placed either in the ONU or OLT vicinity with optimum ONU gain depending of the MUX position -
Optical subsystems for next generation access networks
(2011)
Text en actes de congrés
Accés restringit per política de l'editorialRecent optical technologies are providing higher flexibility to next generation access networks: on the one hand, providing progressive FTTx and specifically FTTH deployment, progressively shortening the copper access ... -
Optimal trade-off for a bidirectional single-fibre single-wavelength TDM-PON rSOA-based ONU
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper, an optimal trade-off between the Optical Distribution Network (ODN) power budget and the upstream optical Signal-to-Rayleigh Ratio (US-oSRR), for a Single- Fibre/Wavelength TDM-PON rSOA-based ONU network ... -
Optimization of Rayleigh-limited WDM-PONs with reflective ONU by MUX positioning and optimal ONU gain
(2010-01)
Article
Accés obertIn this work, the influence of the distribution element position and the reflective optical network unit (ONU) gain in wavelength-division-multiplexing passive optical networks are reported. After the theoretical and ...
