scholarly journals The interferometric noise as a performance limiting factor of IM-DD systems

2002 ◽  
Vol 15 (3) ◽  
pp. 349-359
Author(s):  
Mihajlo Stefanovic ◽  
Petar Spalevic
Keyword(s):  
Cross Talk ◽  
Thermal Noise ◽  
Direct Detection ◽  
Signal Propagation ◽  
Optical Signal ◽  
Limiting Factor ◽  
Noise Sources ◽  
Gaussian Form ◽  
The Cross ◽  
Receiver Input

In this paper, the signal propagation along the fiber, in either absence or presence of the cross talk interference appearing at different places along the fiber, for both dispersive regime cases, is considered. The optical signal that appears at transmitter output has the envelope in super-Gaussian form. The cross talk appears at the transmitter output or along the fiber The pulse shape at the receiver input is determined using Schrodinger equation. The noise sources are the photo detector and resistance in the receiver. The bit error probability of intensity modulation and direct detection (IM-DD) system in the presence of the cross talk, quantum and thermal noise is determined.

scholarly journals BER analysis of IM/DD FSO system with APD receiver over gamma-gamma turbulence

2014 ◽  
Vol 11 (1) ◽  
pp. 61-72 ◽  
Author(s):  
Milica Petkovic ◽  
Goran Djordjevic ◽  
Dejan Milic ◽  
Bata Vasic
Keyword(s):  
Path Length ◽  
Thermal Noise ◽  
Direct Detection ◽  
Noise Temperature ◽  
Avalanche Photodiode ◽  
Optical Signal ◽  
Propagation Path ◽  
Free Space Optical ◽  
Scale Models ◽  
Inner Scale

In this paper, the bit-error rate (BER) performance of intensity modulated with direct detection (IM/DD) free space optical (FSO) system using the on-off keying (OOK) and avalanche photodiode (APD) receiver is analyzed. The intensity fluctuations of the received optical signal are modeled by gamma gamma distribution, while both zero and nonzero inner scale models are observed. The total receiver noise includes APD shot noise and thermal noise. The BER expression is theoretically derived and numerical results are presented. The results illustrate the BER dependence on the turbulence strength, propagation path length, APD gain and noise temperature.

The Role of Sensing Peptides in the Cross-talk between Microbiota and Human Cancer Cells

2018 ◽  
Vol 18 (18) ◽  
pp. 1567-1571
Author(s):  
Anna Lucia Tornesello ◽  
Luigi Buonaguro ◽  
Maria Lina Tornesello ◽  
Franco M. Buonaguro
Keyword(s):  
Cancer Cells ◽  
Cross Talk ◽  
Human Cancer ◽  
Human Cancer Cells ◽  
The Cross

Effect of the cross-talk between autophagy and endoplasmic reticulum stress on Mn-induced alpha-synuclein oligomerization

2017 ◽  
Vol 33 (3) ◽  
pp. 315-324 ◽  
Author(s):  
Chang Liu ◽  
Dong-Ying Yan ◽  
Xuan Tan ◽  
Zhuo Ma ◽  
Can Wang ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Endoplasmic Reticulum Stress ◽  
Cross Talk ◽  
Alpha Synuclein ◽  
The Cross

scholarly journals LecRK-Ⅷ.2 mediates the cross-talk between sugar and brassinosteroid during hypocotyl elongation in Arabidopsis

2021 ◽  
Vol 1 (1) ◽  
pp. 55-63
Author(s):  
NingJie Hao ◽  
Xiaoxiao Zou ◽  
Xiaoxia Lin ◽  
Ruqiong Cai ◽  
Wenjun Xiao ◽  
...  
Keyword(s):  
Cross Talk ◽  
Hypocotyl Elongation ◽  
The Cross

40 Gb/s High-speed mode-division multiplexing transmission employing NRZ modulation format

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Rabiu Imam Sabitu ◽  
Nafizah Goriman Khan ◽  
Amin Malekmohammadi
Keyword(s):  
System Performance ◽  
High Speed ◽  
Direct Detection ◽  
Signal To Noise Ratio ◽  
Optical Signal ◽  
Threshold Power ◽  
Modulation Format ◽  
Transmission Distance ◽  
Mode Division Multiplexing ◽  
Speed Mode

AbstractThis report examines the performance of a high-speed MDM transmission system supporting four nondegenerate spatial modes at 10 Gb/s. The analysis adopts the NRZ modulation format to evaluate the system performance in terms of a minimum power required (PN) and the nonlinear threshold power (PTH) at a BER of 10−9. The receiver sensitivity, optical signal-to-noise ratio, and the maximum transmission distance were investigated using the direct detection by employing a multimode erbium-doped amplifier (MM-EDFA). It was found that by properly optimizing the MM-EDFA, the system performance can significantly be improved.

Are neutrophil extracellular traps the link for the cross-talk between periodontitis and rheumatoid arthritis physiopathology?

Rheumatology ◽  
2021 ◽  
Author(s):  
Sicília Rezende Oliveira ◽  
José Alcides A de Arruda ◽  
Ayda Henriques Schneider ◽  
Valessa Florindo Carvalho ◽  
Caio Machado ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Cross Talk ◽  
Neutrophil Extracellular Traps ◽  
Periodontal Therapy ◽  
Clinical Parameters ◽  
Extracellular Traps ◽  
Early Ra ◽  
The Cross ◽  
High Concentrations ◽  
The Impact

Abstract Objectives Neutrophil extracellular traps (NETs) play a role in the pathogenesis of periodontitis and rheumatoid arthritis (RA). However, it remains poorly understood whether NETs participate in the cross-talk between periodontitis and RA. Herein, we investigated the production of NETs in individuals with periodontitis and RA and its association with clinical parameters. The impact of periodontal therapy on RA and NET release was also assessed. Methods The concentration of NETs and cytokines was determined in the saliva and plasma of individuals with early RA (n = 24), established RA (n = 64), and individuals without RA (n = 76). The influence of periodontitis on the production of NETs and cytokines was also evaluated. Results Individuals with early RA had a higher concentration of NETs in saliva and plasma than individuals with established RA or without RA. Periodontitis resulted in an increase in the concentration of NETs of groups of individuals without RA and with early RA. The proportion of individuals with high concentrations of IL-6, IL-10 and GM-CSF was higher among individuals with periodontitis than among individuals without periodontitis. The concentrations of TNF-α, IL-6, IL-17/IL-25, and IL-28A were particularly high in individuals with early RA. Worse periodontal clinical parameters, RA onset and RA activity were significantly associated with circulating NETs. Periodontal therapy was associated with a reduction in the concentration of NETs and inflammatory cytokines and amelioration in periodontitis and RA. Conclusion This study reveals that NETs are a possible link between periodontitis and RA, with periodontal therapy resulting in a dramatic switch in circulating NET levels.

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