DoE-based Evaluation of the Impact of the Twisted-Pair-Cable Parameters on the Wireless Communication Performance

The performance of the underwater optical wireless communication (UOWC) system is highly affected by seawater´s inherent optical properties and the solar radiation from sunlight, especially for a shallow environment. The multipath effect and degradations in signal-to-noise ratio (SNR) due to absorption, scattering, and ambient noises can significantly limit the viable communication range, which poses key challenges to its large-scale commercial applications. To this end, this paper proposes a unified model for underwater channel characterization and system performance analysis in the presence of solar noises utilizing a photon tracing algorithm. Besides, we developed a generic simulation platform with configurable parameters and self-defined scenarios via MATLAB. Based on this platform, a comprehensive investigation of underwater channel impairments was conducted including temporal and spatial dispersion, illumination distribution pattern, and statistical attenuation with various oceanic types. The impact of ambient noise at different operation depths on the bit error rate (BER) performance of the shallow UOWC system was evaluated under typical specifications. Simulation results revealed that the multipath dispersion is tied closely to the multiple scattering phenomenon. The delay spread and ambient noise effect can be mitigated by considering a narrow field of view (FOV) and it also enables the system to exhibit optimal performance on combining with a wide aperture.

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Characterizing the Impact of Doppler Effects on Body-Centric LoRa Links with SDR

Sensors ◽

10.3390/s21124049 ◽

2021 ◽

Vol 21 (12) ◽

pp. 4049

Author(s):

Thomas Ameloot ◽

Marc Moeneclaey ◽

Patrick Van Van Torre ◽

Hendrik Rogier

Keyword(s):

Wireless Communication ◽

Low Power ◽

Multipath Fading ◽

Doppler Spread ◽

Excellent Performance ◽

Wireless Applications ◽

Doppler Shifts ◽

Doppler Effects ◽

The Impact ◽

Measurement Campaigns

Long-range, low-power wireless technologies such as LoRa have been shown to exhibit excellent performance when applied in body-centric wireless applications. However, the robustness of LoRa technology to Doppler spread has recently been called into question by a number of researchers. This paper evaluates the impact of static and dynamic Doppler shifts on a simulated LoRa symbol detector and two types of simulated LoRa receivers. The results are interpreted specifically for body-centric applications and confirm that, in most application environments, pure Doppler effects are unlikely to severely disrupt wireless communication, confirming previous research, which stated that the link deteriorations observed in a number of practical LoRa measurement campaigns would mainly be caused by multipath fading effects. Yet, dynamic Doppler shifts, which occur as a result of the relative acceleration between communicating nodes, are also shown to contribute to link degradation. This is especially so for higher LoRa spreading factors and larger packet sizes.

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Impact of Various Parameters on the Performance of Inter-aircraft Optical Wireless Communication Link

Journal of Optical Communications ◽

10.1515/joc-2016-0112 ◽

2017 ◽

Vol 39 (1) ◽

Author(s):

Mehtab Singh

Keyword(s):

Wireless Communication ◽

Transmission Rate ◽

Power Level ◽

Communication Link ◽

Optical Wireless Communication ◽

Optical Wireless ◽

Antenna Aperture ◽

Aperture Diameter ◽

Pointing Error ◽

The Impact

AbstractOptical wireless communication (OWC) systems also known as Free space optics (FSO) are capable of providing high channel bandwidth, high data transmission rates, low power consumption, and high security. OWC links are being considered in different applications such as inter-satellite links, terrestrial links, and inter-aircraft communication links. This paper investigates the impact of different system parameters such as transmission power level, operating wavelength, transmitter pointing error angle, bit transmission rate, atmospheric attenuation, antenna aperture diameter, geometric losses, the responsivity of the photodetector, and link range on the performance of inter-aircraft optical wireless communication link.

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Impact of accelerometer based in physical layer wireless networks

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i2.5.10046 ◽

2018 ◽

Vol 7 (2.5) ◽

pp. 15

Author(s):

Zuhanis Mansor ◽

Muhammad Khairulanwar bin Zulkafli

Keyword(s):

Wireless Communication ◽

Landscape Position ◽

Line Of Sight ◽

Noise Power ◽

Signal Power ◽

Propagation Channel ◽

Signal To Noise ◽

Downlink Throughput ◽

The Impact ◽

Non Line Of Sight

The initial deployments of antenna in the handset consist of fixed non-rotated antenna for transmitting and receiving the signal in the wireless communication scenario. However, link correlation at the UE shows very bad performance when the handset rotates in landscape position. This paper evaluates the impact of accelerometer on the downlink propagation channel of 3G smartphone for non-line-of-sight links. The performance average received signal power is studied for user equipment. Results show that the exploitation of an accelerometer provide better performance in terms of received signal power when the handset rotated from portrait to landscape position. It can be concluded that the deployment of accelerometer can be used to improve existing 3G smartphone received signal. Results also indicate that accelerometer can be used to improve downlink throughput since the signal-to-noise-power is increased by approximately 16%.

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Working Anywhere and Working Anyhow?

Advances in Human Resources Management and Organizational Development - Anywhere Working and the New Era of Telecommuting ◽

10.4018/978-1-5225-2328-4.ch004 ◽

2017 ◽

pp. 90-112

Author(s):

Alessandro Wärzner ◽

Martina Hartner-Tiefenthaler ◽

Sabine Theresia Koeszegi

Keyword(s):

Computer Mediated Communication ◽

Job Demands ◽

Communication Technologies ◽

Analytical Framework ◽

Information Communication Technologies ◽

Information Communication ◽

Mediated Communication ◽

Communication Performance ◽

Computer Mediated ◽

The Impact

Working from anywhere relies heavily on information communication technologies (ICT). Scholars are increasingly utilizing a tension-based research lens to investigate organisational paradoxes which are rooted in opposite tendencies that might negate one another. Thus, computer-mediated communication can be both demanding and resourceful. The aim of this chapter is to present an analytical framework integrating three distinct but interrelated perspectives (task, medium and individual) to account for individuals' perceptions of job demands and job resources associated with the usage of ICT when working from anywhere. This chapter draws on insights from theories of media choice and communication performance, the self-determination theory and the job demands-resources model to better understand the impact of communication in the remote setting.

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Prediction of the impact of transient disturbances in real-time digital wireless communication systems

IEEE Electromagnetic Compatibility Magazine ◽

10.1109/memc.2014.6924332 ◽

2014 ◽

Vol 3 (3) ◽

pp. 76-83 ◽

Cited By ~ 12

Author(s):

M. Pous ◽

F. Silva

Keyword(s):

Wireless Communication ◽

Real Time ◽

Communication Systems ◽

Wireless Communication Systems ◽

Transient Disturbances ◽

The Impact

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Competing Risks Models for the Assessment of Intelligent Transportation Systems Devices: A Case Study for Connected and Autonomous Vehicle Applications

Infrastructures ◽

10.3390/infrastructures5030030 ◽

2020 ◽

Vol 5 (3) ◽

pp. 30 ◽

Cited By ~ 2

Author(s):

Sylvester Inkoom ◽

John Sobanjo ◽

Eric Chicken

Keyword(s):

Wireless Communication ◽

Communication Networks ◽

Competing Risks ◽

Communication Systems ◽

Intelligent Transportation ◽

Transportation Systems ◽

Hazard Ratio ◽

Connected Vehicle ◽

Average Hazard Ratio ◽

The Impact

Intelligent transportation system (ITS) has become a crucial section of transportation and traffic management systems in the past decades. As a result, transportation agencies keep improving the quality of transportation infrastructure management information for accessibility and security of transportation networks. The goal of this paper is to evaluate the impact of two competing risks: “natural deterioration” of ITS devices and hurricane-induced failure of the same components. The major devices employed in the architecture of this paper include closed circuit television (CCTV) cameras, automatic vehicle identification (AVI) systems, dynamic message signals (DMS), wireless communication systems and DMS towers. From the findings, it was evident that as ITS infrastructure devices age, the contribution of Hurricane Category 3 as a competing failure risk is higher and significant compared to the natural deterioration of devices. Hurricane Category 3 failure vs. natural deterioration indicated an average hazard ratio of 1.5 for CCTV, AVI and wireless communications systems and an average hazard ratio of 2.3 for DMS, DMS towers and portable DMS. The proportional hazard ratios of the Hurricane Category 1 compared to the devices was estimated as <0.001 and that of Hurricane Category 2 < 0.5, demonstrating the lesser impact of the Hurricane Categories 1 and 2. It is expedient to envisage and forecast the impact of hurricanes on the failure of wireless communication networks, vehicle detection systems and other message signals, in order to prevent vehicle to infrastructure connection disruption, especially for autonomous and connected vehicle systems.

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THE IMPACT OF MESSAGE-BUFFER ALIGNMENT ON COMMUNICATION PERFORMANCE

Parallel Processing Letters ◽

10.1142/s0129626405002052 ◽

2005 ◽

Vol 15 (01n02) ◽

pp. 49-65 ◽

Cited By ~ 4

Author(s):

LEON ARBER ◽

SCOTT PAKIN

Keyword(s):

Network Performance ◽

Performance Test ◽

Careful Analysis ◽

Communication Performance ◽

Accepted Practice ◽

The Many ◽

Performance Discrepancy ◽

Relationship Of ◽

The Impact

Of the many factors that contribute to communication performance, perhaps one of the least investigated is that of message-buffer alignment. Although the generally accepted practice is to page-align buffer memory for best performance, our studies show that the actual relationship of buffer alignment to communication performance cannot be expressed with such a simple formula. This paper presents a case study in which porting a simple network performance test from one language to another resulted in a large performance discrepancy even though both versions of the code consist primarily of calls to messaging-layer functions. Careful analysis of the two code versions revealed that the discrepancy relates to the alignment in memory of the message buffers. Further investigation revealed some surprising results about the impact of message-buffer alignment on communication performance: (1) different networks and node architectures prefer different buffer alignments; (2) page-aligned memory does not always give the best possible performance, and, in some cases, actually yields the worst possible performance; and, (3) on some systems, the most significant factor affecting network performance is the relative alignment of send and receive buffers with respect to each other.

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