Simultaneous Communication Research Articles

The Influence of Marketing Communication Via Instagram at the Al Amjad Islamic School in Medan on the Perceptions and Educational Preferences of Students' Parents

The purpose of this study was to analyze the influence of marketing communication of Al Amjad Islamic School through Instagram on the perception and educational preferences of students' parents. The study used a quantitative approach with a correlation method. The sampling technique used stratified random sampling with 325 student samples at Al Amjad Islamic School Medan. The results showed that the advertising dimension obtained a value of 88%, the facility dimension obtained a value of 87.1% and the peer dimension obtained a value of 87.7%. The results of simultaneous calculations showed that the H0 hypothesis was rejected and Ha was accepted so that simultaneous marketing communication had a significant effect on educational perceptions and preferences

Secure Unmanned Aerial Vehicle Communication in Dual-Function Radar Communication System by Exploiting Constructive Interference

In contrast from traditional unmanned aerial vehicle communication via unlicensed spectrum, connecting unmanned aerial vehicles with cellular networks can extend their communication coverage and improve the quality of their service. In addition, the emerging dual-functional radar communication paradigm in cellular systems can better meet the requirements of location-sensitive tasks such as reconnaissance and cargo delivery. Based on the above considerations, in this paper, we study the simultaneous communication and target sensing issue in cellular-connected unmanned aerial vehicle systems. Specifically, we consider a two-cell coordinated system with two base stations, cellular unmanned aerial vehicles, and potential aerial targets. In such systems, the communication security issue of cellular unmanned aerial vehicles regarding eavesdropping on their target is inevitable since the main beam of the transmit waveform needs to point to the direction of the target for achieving a sufficient detection performance. Aiming at protecting the privacy of cellular transmission as well as performing target sensing, we exploit the physical layer security technique with the aid of constructive interference-based precoding. A transmit power minimization problem is formulated with constraints on secure and reliable cellular transmission and a sufficient radar signal-to-interference-plus-noise ratio. By specially designing the transmit beamforming vectors at the base stations, the received signals at the cellular users are located in the decision regions of the transmitted symbols while the targets can only receive wrong symbols. We also compare the performance of the proposed scheme with that of the traditional one without constructive interference. The simulation results show that the proposed constructive interference-based strategy can meet the requirements of simultaneous target sensing and secure communication, and also save transmit power compared with the traditional scheme.

Power-Domain Interference Graph Estimation for Multi-hop BLE Networks

Traditional wisdom for network management allocates network resources separately for the measurement and communication tasks. Heavy measurement tasks may compete limited resources with communication tasks and significantly degrade overall network performance. It is therefore challenging for the interference graph, deemed as incurring heavy measurement overhead, to be used in practice in wireless networks. To address this challenge in wireless sensor networks, our core insight is to use power as a new dimension for interference graph estimation (IGE) such that IGE can be done simultaneously with the communication tasks using the same frequency-time resources. We propose to marry power-domain IGE with concurrent flooding to achieve simultaneous measurement and communication in BLE networks, where the power linearity prerequisite for power-domain IGE holds naturally true in concurrent flooding. With extensive experiments, we conclude the necessary conditions for the power linearity to hold and analyze several non-linearity issues of power related to hardware imperfections. We design and implement network protocols and power control algorithms for IGE in multi-hop BLE networks and conduct experiments to show that the marriage is mutually beneficial for both IGE and concurrent flooding. Furthermore, we demonstrate the potential of IGE in improving channel map convergence and convergecast in BLE networks.

X-law operation for energy-efficient time-of-arrival positioning to achieve higher accuracy with lower bandwidth: A game-changer for UWB localization devices

Ultra-wideband (UWB) technology is a good candidate for low-latency high-resolution localization. This paper proposes the x-law operation (XLO) to boost the positioning accuracy of UWB localization systems. The proposed scheme significantly reduces the contribution of low-SNR samples and increases the time resolution of the pulse. Thus, the XLO achieves a time-of-arrival (ToA) positioning accuracy that existing methods require more energy and bandwidth to attain. The significant performance gain of the XLO for localization makes the XLO a good candidate for simultaneous positioning and communication with low complexity, high performance, and low power consumption suited for Internet of Things (IoT) devices.

Millimeter-Wave Transceiver Utilizing On-Chip Butler Matrix for Simultaneous 5G Relay Communication and Wireless Power Transfer

Millimeter-Wave Transceiver Utilizing On-Chip Butler Matrix for Simultaneous 5G Relay Communication and Wireless Power Transfer

Event-triggered distributed consensus control of heterogeneous multi-agent system under communication and actuator faults

In this paper, a heterogeneous leader-follower multi-agent system is studied under simultaneous time-varying communication faults and actuator faults. First, the state of the leader is modeled as the closed-loop reference model (CRM) where the states of the direct-connected followers are fed to the leader to improve the leader-follower tracking capability. An event-triggered communication mechanism is designed for the agent information sharing among its neighbors so as to reduce the communication burden. The designed event-triggered mechanism, capable of adjusting the triggering interval threshold within a certain range, can be applied in practical multi-robot collaborative control to accommodate the varying requirements for different triggering intervals. Considering the time-varying communication link failures, a new distributed event-triggered observer is designed for each follower to estimate the system states so as to reduce the state error, whereas the adaptive distributed event-triggered estimators are further designed for the non-directly connected followers to estimate the coefficient matrix of the leader system. Then, an estimator is designed for the actuator fault estimation to mitigate their impact on the system consistency. Finally, an adaptive control strategy is proposed to ensure the consistency of the leader-follower system under the time-varying communication link faults and actuator faults. It is also shown that Zeno behavior is excluded for each agent and the effectiveness of the proposed adaptive event-triggered control strategy is verified on a heterogeneous multi-agent system.

Analisis Pelatihan Kerja, Komunikasi, dan Pengembangan Karir Terhadap Kinerja Karyawan PT. Indomarco Prismatama Cabang Medan

This study aims to find the influence of job training, communication, and career development on the performance of employees of PT Indomarco Prismatama Medan Branch. This type of research is causal research with a quantitative approach. The number of samples in this study is 73 employees. The data collection technique used is a questionnaire technique. This study uses quantitative data processed with SPSS 25.0 with a multiple linear regression model. The results of the study show that partial and simultaneous job training, communication, and career development have a positive and significant effect on the performance of employees of PT Indomarco Prismatama Medan Branch. The results of the t-test showed that the job training had a regression value of 0.223, a tcal value = 2.559 and a significant = 0.000. Communication has a regression value of 0.414, has a tcal value = 4.747 and significant = 0.000. Career development has a regression value of 0.255 and a calculation value of 3,682. The results of the determination coefficient test of 91.6% of employee performance can be explained and obtained from the variables of job training, communication, and career development while the remaining 8.4% is influenced by other factors.

A Roadmap for NF-ISAC in 6G: A Comprehensive Overview and Tutorial.

Near-field (NF) integrated sensing and communication (ISAC) has the potential to revolutionize future wireless networks. It enables simultaneous communication and sensing operations on the same radio frequency (RF) resources using a shared hardware platform, maximizing resource utilization. NF-ISAC systems can improve communication and sensing performance compared to traditional far-field (FF) ISAC systems by exploiting the unique propagation characteristics of NF spherical waves with an additional distance dimension. Despite its potential, NF-ISAC research is still in its early stages, and a comprehensive survey of the technology is lacking. This paper systematically explores NF-ISAC technology, providing an in-depth analysis of both NF and FF systems, their applicability in various scenarios, and different channel models. It highlights the advantages and philosophies of ISAC, examining both narrow-band and wide-band NF-ISAC systems. Case studies and simulations offer deeper insights into NF-ISAC design philosophies. Additionally, the paper reviews the existing NF-ISAC literature, methodologies, potentials, and conclusions, and discusses future research areas, challenges, and applications.

Multi-head self-attention mechanism combined with feedforward network for time-varying nonlinear digital self-interference cancellation

In-band full duplex (IBFD) allows simultaneous communication in the same frequency band, thus significantly improving spectral efficiency. However, self-interference (SI) at the local transmitter affects decoding at the receiver, and SI intensity increases when the channel is time-varying. Existing techniques concentrate on dealing with digital self-interference (DSI) in static channels, which are difficult to adapt to time-varying environments. For this purpose, firstly, the recursive least squares (RLS) method is utilized to counteract linear DSI. Secondly, a new feedforward neural network based on the multi-head self-attention mechanism (MHSAM-FFNN) is designed to eliminate dynamically changing nonlinear DSI. RLS can track signals and update linear coefficients. The self-attention mechanism computes the attention between any two signals in a time-varying sequence and aggregates the temporal relations by the obtained attention weights. MHSAM-FFNN utilizes multiple self-attention modules in parallel, which enhances the acquisition of different effective information in the time-varying sequence to better learn the feature relationships between the current signal and other signals. It ultimately reconstructing the nonlinearity and memory effects of DSI. As tested in different time-varying environments, results show that this paper's scheme successfully reduces DSI to the noise floor. In addition, this paper considers two scenarios where both the power amplifier (PA) and the low noise amplifier (LNA) are nonlinear and where PA is nonlinear while LNA is linear. Results demonstrate that our scheme can achieve higher interference cancellation in different nonlinear scenarios.

The Influence of Leadership Communication on Employee Performance of PT. Duta Karya Bersatu Surabaya

Communication is needed in various areas of human life, including in the economic sector, namely business. Communication is important in an organizational group. Employee performance can also be interpreted as the results achieved by an employee in carrying out his duties and responsibilities in working in the company. This research is to find out how the influence of leadership communication on the performance of employees of PT. Duta Karya Bersatu. The type of research in this study is quantitative research. The scale used by the researcher is the Likert scale. The sample in this study is all employees of PT. Duta Karya Bersatu totaling 34 people. Simultaneous leadership communication has an influence of 13.6%, with a significance value (0.032< 0.05) while 86.4% of employee performance is influenced by other variables that are not studied. It is important for companies to continue to develop strong communication to improve employee performance, in order to advance and strengthen the company's foundation.

Stakeholder Interviews to Inform Best Practice for Public Facing COVID-19 Wastewater Dashboards

Background Wastewater (WW) -based epidemiology is the detection of pathogens from wastewater, typically sewage systems. Its use gained popularity during the COVID-19 pandemic as a rapid and non-invasive way to assess infection prevalence in a population. Public facing dashboards for SARS-CoV-2 were developed in response to the discovery that RNA biomarkers were being shed in faeces before symptoms. However, there is not a standard template or guidance for countries to follow. The aim of this research is to reflect on how currently available dashboards evolved during the pandemic and identify suitable content and rationale from these experiences. Methods Interviews were carried out with implementers and users of dashboards for SARS-CoV-2 WW data across Europe and North America. The interviews addressed commonalities and inconsistencies in displaying epidemiological data of SARS-CoV-2, clinical parameters of COVID-19, data on variants, and data transparency. Results The thematic analysis identified WW dashboard elements that can facilitate standardization, or at least interoperability. These elements emphasise communication among developers under the same organization, open access for identified stakeholders, and data summarized with a time-intensive graphic analysis through normalizing at least by population. Simultaneous communication of clinical surveillance is recommended. More research is needed on flow and faecal indicators for normalization of WW data, and on the analysis and representation of variants. Discussion WW dashboard development between 2020-2023 provided a ‘real-time’ iterative process of data representation, and several recommendations have been identified. Communication of data through dashboards has the potential to support early warning systems for infectious diseases.

SN-FSAT system for single sensor ultrasonic guided wave beam steering and damage detection

In wireless communications as well as in structural health monitoring (SHM) beam steering presents interesting advantages. In the former it plays an important role for data directivity, which is also a perk for energy efficiency and data security; for the latter, directional inspection through guided waves leads also to energy efficiency, arbitrary dedicated space scanning, multi-function operation through multiple beams and even to application of a base-line free inspection concept. Normally, to enable this simultaneous beam control and data communication in arbitrary spatial directions (2D) over a structure, a large array of transducers is required, arranged to a similarly complex hardware and software support system. In this work, we present a system based on a dedicated sensor node (SN) and frequency steerable acoustic transducer (FSAT) combination. The SN-FSAT system is charged of the adequate power and signal management for acquisition, transmission, processing and data evaluation, required to perform spatial scanning and damage detection, as well as direction focused wireless communication tasks. These were tested over an isotropic aluminum plate-like structure by means of a double symmetric beam, via differential actuation signals, or in a high directive beam in a single direction by means of a quadrature driving signals. The complete guided wave-based setup consists of three SN-FSAT pairs. As damage a pseudo fault of a small added mass with damping tacky tape was used. The results show that damage located in different positions around the FSATs can be detected without a baseline reference and multiple directional communication paths between the SN-FSAT network can be established.

Metalens optical receiver for multi-beam free-space optical communication

A conventional optical receiver with a single detector accepts optical beams from a small range of angles of arrival (AoAs) and hence is not suitable for simultaneous communication with nodes with angular diversity. Here, we demonstrate a novel, to our knowledge, two-metalens-single-detector optical receiver that can collect optical beams coming from a wide range of AoAs. We show that the capability to collect broad AoAs with high efficiency makes the proposed receiver suitable for multi-beam free-space optical communication. An analysis for an exemplary three-beam system shows more than 70% collection efficiency at 2° AoA, which is 35× higher than conventional receivers.

Single-Source VLCP System Based on Solar Cell Array Receiver and Right-Angled Tetrahedron Trilateration VLP (RATT-VLP) Algorithm

A significant deployment limitation for visible light communication and positioning (VLCP) systems in energy- and light-source-restricted scenarios is the reliance of photodetectors (PDs) on external power supplies, compromising sustainability and complicating receiver charging. Solar cells (SCs), capable of harvesting and converting environmental light into electrical energy, offer a promising alternative. Consequently, we first propose an indoor VLCP system that utilizes an SC array as the receiver, alongside a right-angled tetrahedron trilateration visible light positioning (RATT-VLP) algorithm based on a single light source and multiple receivers. The proposed system uses an SC array in place of PDs, utilizing binary phase shift keying (BPSK) signals for simultaneous communication and positioning. In experiments, we verified the system’s error-free communication rate of 1.21 kbps and average positioning error of 3.40 cm in a 30 cm × 30 cm area, indicating that the system can simultaneously satisfy low-speed communication and accurate positioning applications. This provides a viable foundation for further research on SC-based VLCP systems, facilitating potential applications in environments like underwater wireless communication, positioning, and storage tank inspection.

Mobility-Enhancement Simultaneous Optical Wireless Communication and Energy Harvesting System for IoUT

Mobility-Enhancement Simultaneous Optical Wireless Communication and Energy Harvesting System for IoUT

Channel modeling for NLoS visible light networks with integrated sensing and communication.

Inspired by the advanced integrated sensing and communication (ISAC), in this Letter, we explore the non-line-of-sight (NLoS) optical channels formed by reflections from the ground or objects to establish an integrated channel model for simultaneous communication and sensing. The integrated channel model can, on the one hand, perceive the changes in the surrounding environment and, on the other hand, determine whether these changes positively or negatively affect the quality of communication simultaneously. To validate the effectiveness of the proposed model, from sensing, we analyze the impact of various floor materials and visible light communication (VLC) users on the integrated channel; from communication, we characterize the influence of perceived environmental changes on communication performance by calculating throughput. Experimental results confirm the capability of the derived model, which can support the design and deployment of VL-based ISAC networks.

Linguistic and pragmatic aspects of communication in the modern media world

Taking into account the purposeful activity of modern man, his acquisition of huge masses of information during a short period, the communication aspect of communication in the business sphere has gradually turned from a means of enjoyment, length, and unhurried language interaction into a means of accurate, short and simultaneous full communication of a problem, initiative, proposal. Communication pragmatics came to the aid of such language transformations. The article proves that pragmalinguistics studies speech communication as a manifestation of speech activity – purposeful influence on each other (persuasion, persuasion, request for information, etc.) using language. To achieve their communicative goals, depending on the context and situation, their communicative roles, the speaker and the addressee use certain speech acts (written as sentences) corresponding to these goals – stating facts, encouraging action, etc. It is scientifically determined that the emergence of ecolinguistics is due to the need to solve the problems of interaction between language, man and nature. It is indicated that it covers extremely diverse research that reflects the importance of environmental issues in society. The attention paid to issues of environmental protection at all levels of society, and as a result, the relevance of environmental issues, as well as the peculiarities of communication in the field of environmental protection, allow us to distinguish a separate type of discourse - ecological, which is characterized by the constant addition of the ecological glossary, the emergence of special axiological units, the presence of separate status models - role configuration, which determine the use of certain communicative strategies in specific communicative situations. It was highlighted in practice that the main discourse-creating concepts in environmental discourse are environment, pollution, energy, and climate change, which constitute the semantic base of communication in the field of environmental protection.

Students' experience of interpersonal interactions quality in e-Learning: A qualitative research.

Online Interaction is a critical characteristic of distance learning, and effective online communication models empower students. This research aimed to explain students' experiences on the quality of interpersonal interactions in e-learning. This study was conducted from November 2021 to October 2022. The qualitative descriptive design via conventional content analysis was utilized. Purposeful and maximum variation methods recruited sixteen participants from three medical science universities in Iran. The data were collected through semi-structured, in-depth, face-to-face, or online interviews. Interviews were recorded through a digital recorder, and analysis was achieved simultaneously with data collection using Graneheim and Lundman (2004). The Lincoln and Guba criteria, including credibility, dependability, transferability, and confirmability, were used to improve the trustworthiness of the findings. The results indicated the importance of different dimensions related to teaching-learning. It seems crucial to develop a comfortable and safe environment to improve interpersonal interactions. Educators should be provided with pedagogical skills to support interactions. In addition, focusing on some learners' soft skills is also vital. In addition to the significance of the teacher's inclusive role, the educational content must have critical standards. Constructive feedback and the proper use of simultaneous and non-simultaneous communication tools and social networks are other important issues in strengthening interpersonal relationships. Ultimately, comprehensive and ongoing support of learners improves the quality of interpersonal interactions. The results indicated the significance of different dimensions of teaching-learning as facilitating factors of interpersonal interactions. The proper use of simultaneous and non-simultaneous communication tools and social networks are other important issues in strengthening interpersonal relationships. Ultimately, comprehensive and ongoing support of learners improves the quality of interpersonal interactions. The results of this study give teachers the insight to keep essential issues in mind when developing their online courses and students to be aware of their roles in the online learning process. Also, the characteristics of simultaneous and non-synchronous platforms, social messaging networks, and learner support are crucial.

Classical-quantum dual encoding for laser communications in space

In typical laser communications classical information is encoded by modulating the amplitude of the laser beam and measured via direct detection. We add a layer of security using quantum physics to this standard scheme, applicable to free-space channels. We consider a simultaneous classical-quantum communication scheme where the classical information is encoded in the usual way and the quantum information is encoded as fluctuations of a sub-Poissonian noise-floor. For secret key generation, we consider a continuous-variable quantum key distribution protocol (CVQKD) using a Gaussian ensemble of squeezed states and direct detection. Under the assumption of passive attacks secure key generation and classical communication can proceed simultaneously. Compared with standard CVQKD, which is secure against unrestricted attacks, our added layer of quantum security is simple to implement, robust and does not affect classical data rates. We perform detailed simulations of the performance of the protocol for a free-space atmospheric channel. We analyse security of the CVQKD protocol in the composable finite-size regime.

Smartphone-Enabled Interaction on Large Displays—A Web-Technology-Based Approach

This paper proposes the design and implementation of a system for simultaneous communication of several users over a single display, such as large public displays or video walls. Motivated by the lack of software frameworks that are both free and suited for the desired level of complexity, we present a novel, out-of-the-box solution for collaborative and remotely controlled application use. The solution is based exclusively on web technologies, thus significantly facilitating usability and reach, and eliminating the need for additional software installations or the use of additional devices. The architecture of the developed solution is modular and comprises three main components: (1) the environment, (2) the remote controllable application (RCA), and (3) the controller. The environment serves as a central hub that manages the data flow and ensures synchronization between the user devices. The RCA, which runs on the large display, serves as the interface for interacting with the content, while the controller, which is loaded on the users’ smartphones, enables control and interaction with the RCA in real time. By using web sockets and a server–client architecture, the system supports device- and platform-independent remote control and centralized collaboration through an off-the-shelf communication framework entirely flexible regarding client application. In order to demonstrate the possibilities of the proposed system, several different scenarios were covered, and solutions were implemented and tested on a large display in the faculty lobby.