Results 11 to 20 of about 10,809 (212)

Transmission of PM-QPSK and PS-QPSK with different fiber span lengths [PDF]

Optics Express, 2012
We perform experimental and numerical investigations of the transmission reach of polarization-switched QPSK (PS-QPSK) and polarization-multiplexed QPSK (PM-QPSK) for three different fiber span lengths: 83, 111 and 136 km. In the experimental comparison we investigate the performance of PS-QPSK at 20 Gbaud and PM-QPSK at the same bit rate (60 Gbit/s ...
Martin, Sjödin, Ben J, Puttnam, Pontus, Johannisson, Satoshi, Shinada, Naoya, Wada, Peter A, Andrekson, Magnus, Karlsson   +6 more
openaire   +3 more sources

Comparison of polarization-switched QPSK and polarization-multiplexed QPSK at 30 Gbit/s [PDF]

Optics Express, 2011
We present the first experimental results for polarization-switched QPSK (PS-QPSK) and make a comparison with polarization-multiplexed QPSK. Our measurements confirm the predicted sensitivity advantage of PS-QPSK. We have also studied the single channel performance after transmission over 300 km and support the results with numerical simulations. It is
Martin, Sjödin, Pontus, Johannisson, Henk, Wymeersch, Peter A, Andrekson, Magnus, Karlsson   +4 more
openaire   +3 more sources

Frequency and Polarization Switched QPSK [PDF]

39th European Conference and Exhibition on Optical Communication (ECOC 2013), 2013
We propose 8-dimensional biorthogonal modulation as a format with 3 dB increased asymptotic power efficiency over PM-QPSK. We demonstrate one possible experimental implementation of this format based on frequency and polarization switching and compare with dual-carrier PM-QPSK and PS-QPSK.
T.A. Eriksson, M. Sjodin, M. Karlsson, P. Johannisson, P.A. Andrekson, E. Agrell   +5 more
openaire   +3 more sources

Linear and Nonlinear Crosstalk Tolerance of Polarization-Switched QPSK and Polarization-Multiplexed QPSK [PDF]

37th European Conference and Exposition on Optical Communications, 2011
The OSNR requirements and linear crosstalk tolerance of PS-QPSK and PM-QPSK are investigated, as well as the transmission performance in the presence of 10 Gbit/s neighboring OOK channels.
Martin Sjödin, Pontus Johannisson, Peter A. Andrekson, Magnus Karlsson   +3 more
openaire   +3 more sources

PDM-iRZ-QPSK vs PS-QPSK at 100 Gbit/s over dispersion-managed links

Optics Express, 2012
We compare by simulation the performance of 100 Gbit/s PDM-iRZ-QPSK and PS-QPSK transmission both in homogeneous and hybrid QPSK/OOK DM links. We detail the reasons of the overall performance investigating each nonlinear effect (SPM, XPM and XPolM) individually.
SERENA, Paolo, ROSSI, Nicola, BONONI, Alberto   +2 more
openaire   +5 more sources

Radio‐Frequency Front‐End‐Free Hybrid Code‐Division and Space‐Division Wireless Multiplexing Using Space‐Time‐Coding Metasurface [PDF]

Nanophotonics
This work constructs a radio‐frequency front‐end‐free hybrid code‐division and space‐division‐multiplexing wireless communication system built on programmable space‐time‐coding metasurfaces. Orthogonal pseudo‐random codes reliably separate overlapped multistream signals that share identical frequency, time, and spatial resources.
Chen Y, Wang X, Yang G, Jin Y.
europepmc   +2 more sources

All-optical processing of multi-level phase shift keyed signals [PDF]

, 2012
A technique that allows the all-optical quantization of M-PSK signals using a parametric mixing process is discussed, including recent experimental demonstrations of high baud rate QPSK regeneration, and issues regarding future scalability of the ...
Joseph Kakande, David J. Richardson, Periklis Petropoulos, Slavík, R., Parmigiani, F., Petropoulos, P., Richardson, D.J., Kakande, J., Radan Slavík, Francesca Parmigiani   +9 more
core   +2 more sources

XOR-Logic Phase Coding Programmable Metasurface for Low Power-Consumption Systems. [PDF]

Adv Sci (Weinh)
By leveraging XOR logic, the biasing‐network complexity of 2D programmable metasurfaces is reduced from m×n to m+n through efficient row‐column control. This enables versatile functions including beam deflection and beamforming, facilitating applications in wireless communications and beyond.
Zhu R, Sui S, Dai J, Zhou Q, Jia Y, Han Y, Li Y, Wang S, Cheng Q, Wang J, Cui TJ.   +10 more
europepmc   +2 more sources

Comparison of 8 x 112 Gb/s PS-QPSK and PDM-QPSK signals over transoceanic distances

, 2022
S.24370-24375We experimentally investigate polarization-switched quadrature phase-shift keying (PS-QPSK) with a symbol rate of 37.3 GBd corresponding to a bit rate of 112 Gb/s.
Molle, L., Fischer, J.K., Schmidt-Langhorst, C., Nölle, M., Peckham, D., Schubert, C.   +5 more
core   +1 more source

The Leaky Feeder, a Reliable Medium for Vehicle to Infrastructure Communications

Applied System Innovation, 2019
Reliable vehicular communications is fast becoming a necessity. Vehicle to infrastructure (V2I) communication, which is critical for safety, is often interrupted when vehicles travel in tunnels.
Hasan Farahneh, Xavier Fernando
doaj   +1 more source