Results 261 to 270 of about 3,274,533 (303)

Coherent Detection of DQPSK for Tolerance to Coherent Crosstalk

Coherent Optical Technologies and Applications, 2008
Coherent crosstalk is a significant challenge in OCDM/A systems especially for high spectral efficiency coherent implementations. We study its impact on DQPSK with coherent detection. An improvement in performance is seen over direct detection.
A. Agarwal, P. Toliver, T. Banwell, R. Menendez, J. Jackel, S. Etemad   +5 more
openaire   +1 more source

Ring-coupled chaotic generator for coherent and non-coherent detection

IFAC Proceedings Volumes, 2013
Abstract This paper deals with chaotic encryption and observer synthesis for coherent detection using a new ring-coupled map firstly introduced by Lozi. The specificity of the switched map under investigation is that it exhibits excellent properties for chaotic encryption, but has no standard solution for the observer design.
Andrea Espinel, Ina Taralova
openaire   +2 more sources

Fast stereovision by coherence detection

1997
A new approach to stereo vision based on similarities between optical flow estimation and disparity computation is introduced. The fully parallel algorithm utilizes fast filter operations and aliasing effects of simple disparity detectors within a coherence detection scheme.
openaire   +2 more sources

Radar detection in coherent Weibull clutter

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1987
In this correspondence, a new model for the Weibull clutter is presented. Then attention is turned to the design of the optimum radar processor to detect an a priori known target signal embedded in coherent Weibull clutter. An original detection scheme is presented and the corresponding performance is assessed.
Alfonso Farina, A. Russo, F. Scannapieco
openaire   +2 more sources

Coherent Detection of Targets in Clutter.

1996
The area of research dedicated to the design and optimisation of radar detection schemes is a constantly evolving held of study. This paper contributes to the held of parametric detection by utilising the Generalised Bessel Function K (GBK) distribution with parameter c = 2, (the Jakeman-Tough model), as a model for radar clutter in the design of an ...
Smith, JC, Martin, M, Iskander, DR
openaire   +2 more sources

Coherent Change Detection for Multipass SAR

IEEE Transactions on Geoscience and Remote Sensing, 2018
This paper focuses on the detection, from a stack of repeated-pass interferometric synthetic aperture radar (SAR) images, of such changes causing a target to completely lose the correlation between one epoch and another. This can be the consequence of human activities, such as construction, destruction, and agricultural activities, and also be the ...
Andrea Monti-Guarnieri, Maria Antonia Brovelli, Marco Manzoni, Mauro Mariotti d'Alessandro, Monia Elisa Molinari, Daniele Oxoli   +5 more
openaire   +1 more source

Algorithms for Coherent Detection

Optical Fiber Communication Conference, 2010
□ Fiber optics is converging with other digital communications fields – cellular, satellite, digital subscriber line, etc. □ But techniques from existing fields are of limited help ▪ our carrier linewidth is much higher, 10-4 baud rate ▪ our impairments are of long duration, >100 symbols ▪ our data rate is much higher, 100Gb/s □ We must develop our own
openaire   +1 more source

Coherent, Self-Coherent, and Differential Detection Systems

2011
In order to meet the ever-increasing demand in telecommunication capacity, fiberoptic communication systems have been evolving dramatically over the past decade [1, 2]. The fiberoptic communication traffic growth has been at a rate of about 2 dB per year, representing a traffic increase of a factor of 100 in 10 years [1, 2].
Xiang Liu, Moshe Nazarathy
openaire   +1 more source

Coherent receiver for AIS satellite detection

2010 4th International Symposium on Communications, Control and Signal Processing (ISCCSP), 2010
AIS is a universal shipborne Automatic Identification System recently introduced for traffic monitoring and safety at sea. Ships exchange navigational information to identify and localize vessels in a short range to avoid collisions. AIS signals use Gaussian Minimum Shift Keying (GMSK) for transmission.
Gallardo, M. M. A. Jurado, SORGER, Ulrich   +1 more
openaire   +2 more sources

Coherent or Heterodyne Detection

1978
In the previous chapter we discussed the detection of the incident power in an optical or infrared wave, basically ignoring the actual frequency of the wave except in the value of the quantum energy and the wavelength or frequency cutoff of the photon detector.
openaire   +1 more source