نتایج جستجو برای: channel polarization
تعداد نتایج: 288464 فیلتر نتایج به سال:
This paper numerically investigated the evolution of the degree of polarization of individual channels and their Stokes parameters in a wavelength division multiplexed (WDM) system in which Kerr nonlinearity and chromatic dispersion are taken into account but in which polarization mode dispersion as well as polarization-dependent loss and gain are neglected. We compared the results to a mean fi...
We present a quantum repeater architecture based on atomic ensembles, which is free of polarization and phase noise. With only simple optical elements, we can obtain the uncorrupted entanglement in the noisy channel. Even if the channel suffers from the general polarization and phase noise, the fidelity of transmitted qubits in our protocol can be stable and have no dependence on the noise para...
The impact of transmit-antenna spacing and signal-to-noiseratio on channel capacity has been measured intensively in a variety of scenarios. When looking at the physical layer throughput of a multiantenna communication system, the behavior over antenna spacing may look completely different, leading to other conclusions regarding the optimal antenna distance. In this paper, we compare —by testbe...
This paper investigates the impact of the polarization on the link probability of transmission and the throughput in the context of the cellular network architectures. A channel link model is proposed in the specific case of dual-polarized, Rayleigh-faded communication links. The pernode throughput is analyzed and the gain achieved by using two distinct polarization modes is discussed. It appea...
Microvillar photoreceptors are intrinsically capable of detecting the orientation of e-vector of linearly polarized light. They provide most invertebrates with an additional sensory channel to detect important features of their visual environment. However, polarization sensitivity (PS) of photoreceptors may lead to the detection of polarization-induced false colors and intensity contrasts. Most...
in this paper we will prove that if $l$ is a continuous symmetric n-linear form on a hilbert spaceand $widehat{l}$ is the associated continuous n-homogeneous polynomial, then $||l||=||widehat{l}||$.for the proof we are using a classical generalized inequality due to s. bernstein for entire functions of exponential type. furthermore we study the case that if x is a banach space then we have tha...
This tutorial treats the fundamentals of polarization theory and polar coding. Arıkan’s original results on binary source and channel polarization methods are studied. Error probability and complexity analyses are offered. The original results are generalized in several directions. Early developments in the field are discussed, pointers to some of the important work omitted from this tutorial a...
The development of wireless telecommunication requires higher speed data rates. Wideband MIMO systems are a possible answer to that need. Both wideband and MIMO characteristics enhance multipath propagation, and require a precise knowledge of the channel to properly exploit their capabilities. The extraction of the channel parameters can be done from the measurements, but also from simulations....
The purpose of the algorithm developed in this thesis was to create a post processing method that could resolve objects at low signal levels using polarization diversity and no knowledge of the atmospheric seeing conditions. The process uses a two-channel system, one unpolarized image and one linearly polarized image, in a GEM algorithm to reconstruct the object. Previous work done by Strong sh...
Effect of antenna polarization on the capacity of a multiple element system in an indoor environment
In this paper, we analyze the behavior of a multiple element antenna system in an indoor environment based on the measurements taken in the Lucent Bell Labs building in Crawford Hill, NJ, with a system of 12 transmitters and 15 receivers. In particular, we investigate the capacity behavior with respect to the polarization of the transmitting/receiving elements and the distance between the trans...
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