Results 11 to 20 of about 42,477 (265)

Optimal and efficient power allocation for OFDM non-coherent cooperative transmission [PDF]

open access: yes2012 IEEE Wireless Communications and Networking Conference (WCNC), 2012
In this paper, we study the subchannel (SC) power allocation for orthogonal frequency division multiplexing (OFDM) multiple access points (APs) systems with non-coherent cooperative transmission. The objective is to maximize the total capacity under per-AP power constraints.
Xin Chen 0019   +5 more
openaire   +1 more source

DLI-Based DP-QPSK Reception Scheme for Short-Range Optical Communication

open access: yesApplied Sciences, 2020
The unacceptably high cost of digital coherent receivers for short-range optical communication has in recent years fueled the study of alternative transmission schemes that are simultaneously highly performing and cost-effective.
Huiwen Yin, Yue Yu, Zhiping Huang
doaj   +1 more source

Squeezing-enhanced communication without a phase reference [PDF]

open access: yesQuantum, 2021
We study the problem of transmitting classical information using quantum Gaussian states on a family of phase-noise channels with a finite decoherence time, such that the phase-reference is lost after $m$ consecutive uses of the transmission line.
Marco Fanizza   +4 more
doaj   +1 more source

Non-Coherent Open-Loop MIMO Communications Over Temporally-Correlated Channels

open access: yesIEEE Access, 2016
This paper investigates the use of non-coherent communication techniques for open-loop transmission over temporally-correlated Rayleigh-fading MIMO channels.
Jorge Cabrejas   +6 more
doaj   +1 more source

INFORMATION TRANSMISSION BASED ON SPECTRUM MANIPULATION OF A WIDEBAND CHAOTIC SIGNAL [PDF]

open access: yesРадиофизика и электроника, 2015
Application of chaotic signals in modern radar and telecommunications is an actual task that can significantly extend the functionality of these systems and improve their performance.
O. V. Zemlyaniy
doaj   +1 more source

Sixty Years of Coherent Versus Non-Coherent Tradeoffs and the Road From 5G to Wireless Futures

open access: yesIEEE Access, 2019
Sixty years of coherent versus non-coherent tradeoff as well as the twenty years of coherent versus non-coherent tradeoff in Multiple-Input Multiple-Output (MIMO) systems are surveyed. Furthermore, the advantages of adaptivity are discussed.
Chao Xu   +7 more
doaj   +1 more source

Average SER analysis of two‐hop WP DF relay system under κ−μ shadowed fading

open access: yesIET Communications, 2021
This paper investigates the performance of a two‐hop decode‐and‐forward relaying system when the source node is energy‐constrained and it harnesses energy using the radio frequency signal radiated by the relay node.
Pawan Kumar, Kalpana Dhaka
doaj   +1 more source

Non-Orthogonality Measure for a Collection of Pure Quantum States

open access: yesEntropy, 2022
Modern optical communication technology can realize a large-scale multilevel (or M-ary) optical signal. Investigating the quantum mechanical nature of such a large-scale M-ary optical signal is essential for a unified understanding of quantum information
Kentaro Kato
doaj   +1 more source

Characterizing decoherence rates of a superconducting qubit by direct microwave scattering

open access: yesnpj Quantum Information, 2021
We experimentally investigate a superconducting qubit coupled to the end of an open transmission line, in a regime where the qubit decay rates to the transmission line and to its own environment are comparable.
Yong Lu   +10 more
doaj   +1 more source

Semiconductor Optical Amplifier (SOA)-Driven Reservoir Computing for Dense Wavelength-Division Multiplexing (DWDM) Signal Compensation

open access: yesSensors, 2023
Optical signal processing (OSP) technology is a crucial part of the optical switching node in the modern optical-fiber communication system, especially when advanced modulation formats, e.g., quadrature amplitude modulation (QAM), are applied.
Yinke Yang   +6 more
doaj   +1 more source

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