Results 41 to 50 of about 46,201 (198)

TEM10 homodyne detection as an optimal small displacement and tilt measurements scheme [PDF]

, 2006
We report an experimental demonstration of optimal measurements of small displacement and tilt of a Gaussian beam - two conjugate variables - involving a homodyne detection with a TEM10 local oscillator.
Bachor, Hans A., Delaubert, Vincent, Fabre, Claude, Harb, Charles C., Lam, Ping Koy, Lassen, Mikael, Treps, Nicolas   +6 more
core   +3 more sources

Demodulation system Patent [PDF]

, 1969
Development of demodulation system for removing amplitude modulation from two quadrature displaced data bearing ...
Dix, M. G., Kerwin, W. J., Munoz, R. M.
core   +1 more source

Experiment towards continuous-variable entanglement swapping: Highly correlated four-partite quantum state [PDF]

, 2003
We present a protocol for performing entanglement swapping with intense pulsed beams. In a first step, the generation of amplitude correlations between two systems that have never interacted directly is demonstrated.
A. Furusawa, C. Bennett, C. Silberhorn, Christine Silberhorn, Christoph Marquardt, D. Bouwmeester, G. Giedke, G. Leuchs, Gerd Leuchs, H.J. Briegel, I. Marcikic, J. Zhang, J. Zhang, J.W. Pan, Joel Heersink, L. Duan, M. Hillery, Michael Brownnutt, N. Korolkova, N. Korolkova, Natalia Korolkova, Oliver Glöckl, P. van Loock, P. van Loock, P. van Loock, P. van Loock, Peter van Loock, Qing Pan, R. Simon, S. Schmitt, S.L. Braunstein, Stefan Lorenz, T.C. Zhang, W.P. Bowen, X. Li, Y.H. Kim   +35 more
core   +2 more sources

Semi-blind adaptive beamforming for high-throughput quadrature amplitude modulation systems

, 2010
A semi-blind adaptive beamforming scheme is proposed for wireless systems that employ high-throughput quadrature amplitude modulation signalling. A minimum number of training symbols, equal to the number of receiver antenna arrays elements, are first ...
Chen, Sheng, Hanzo, Lajos, Yao, Wang
core   +1 more source

Fibre segment interferometry using code-division multiplexed optical signal processing for strain sensing applications [PDF]

, 2013
A novel optical signal processing scheme for multiplexing fibre segment interferometers is proposed. The continuous-wave, homodyne technique combines code-division multiplexing with single-sideband modulation.
Charrett, Thomas O. H., Kissinger, Thomas, Tatam, Ralph P.   +2 more
core   +1 more source

Hardware-Efficient Phase Estimation for Digital Coherent Transmission With Star Constellation QAM

IEEE Photonics Journal, 2010
In order to build optical transmission systems for 100 Gb/s and above on a single wavelength division multiplexing channel, transition from quadrature phase-shift keying (QPSK) to higher quadrature amplitude modulation (QAM) formats seems to be ...
Sebastian Hoffmann, Christian Wördehoff, Ali Al-Bermani, Mohamed El-Darawy, Kidsanapong Puntsri, Ulrich Rückert, Reinhold Noé   +6 more
doaj   +1 more source

Dynamic Channel Allocation Techniques Using Adaptive Modulation and Adaptive Antennas

, 2001
This contribution studies the impact of adaptive quadrature amplitude modulation (AQAM) on network performance when applied to a cellular network, using adaptive antennas in conjunction with both fixed channel allocation (FCA) and locally distributed ...
Blogh, J.S., Cherriman, P.J., Hanzo, L.
core   +1 more source

Integration of a Precolouring Matrix in the Random Demodulator model for improved Compressive Ppectrum Estimation [PDF]

, 2014
The random demodulator (RD) is a compressive sensing (CS) architecture for acquiring frequency sparse, bandlimited signals. Such signals occur in cognitive radio networks for instance, where efficient sampling is a critical design requirement.
Dooley, L.S., Karampoulas, D., Kouadri, S.M.   +2 more
core   +2 more sources

Maximizing the Bandwidth Efficiency of the CMS Tracker Analog Optical Links

, 2005
The feasibility of achieving faster data transmission using advanced digital modulation techniques over the current CMS Tracker analog optical link is explored.
Axer, Markus, Dris, Stefanos, Foudas, Costas, Gill, Karl, Grabit, Robert, Troska, Jan, Vasey, Francois   +6 more
core   +1 more source

Influence of quadrature transformation imbalance on the noise immunity of signal reception with amplitude-phase shift keying

Российский технологический журнал
Objectives. At the present time, amplitude-phase shift keyed (APSK) signals are actively used in satellite communication systems. In particular, they are applied in systems which operate in a limited radio frequency spectrum with increased data ...
G. V. Kulikov, X. Kh. Dang
doaj   +1 more source