Digital Radio Technology Research Articles

Steven V. Abramson: An OLED Unicorn Setting a Shining Example for the Industry

Steven V. Abramson: An OLED Unicorn Setting a Shining Example for the Industry

An Overview of Periodic Wireless Sensor Networks to The Internet of Things

Through developments in digital electronics and wireless technology, a variety of tiny devices have begun to be used in many aspects of everyday life. These devices can sense, compute and communicate. These typically consist of low-power radios, many smart sensors, and integrated CPUs. Such devices are utilized to establish a wireless sensor network (WSN) essential for the delivery of sensing services and monitoring of weather conditions. The concept of the Internet of things (IoT) is formed in conjunction with WSNs, where IoT can be described as an interconnection between recognizable devices in sensing and monitoring processes inside the internet networks. This paper offers a description of Periodic WSNs in general. It also offers an overview of the PWSN applications and challenges.

Digital Wireless Technology to Measure Agricultural Performance

When testing agricultural machinery in order to determine its functional indicators, the ability to wirelessly transmit data between sensors, measuring and information systems are important. (Researchpurpose) To develop methods and create wireless digital devices for determining the functional indicators of agricultural tractors and machines with the ability to wirelessly transmit data to a remote control point in real time. (Materials and methods) The authors assumed that it was possible to determine the slipping of driving wheels using an inertial navigation system. It was found that in order to calculate real-time indicators obtained using wireless technologies, it was necessary to determine the characteristics of the input signals of discrete sensors on the side of the measuring system. (Results anddiscussions) The authors substantiated a method for determining the period of incoming signals of discrete sensors with an accuracy of 0.001 seconds for wireless information transmission. They proposed the design of a slipping sensor for an energy vehicle driving wheels, the main element of which is an inertial wheel position sensor. They developed a discrete signal input module and an inertial slipping sensor with the possibility of wireless data transmission based on a radio system with a carrier frequency of 433 megahertz. During field tests, it was found that the accuracy of determining slippage using the inertial wireless sensor IP-291 does not exceed 1 percent; the range of stable radio communication from the tested object to the test control center reaches 1000 meters; the current indicators obtained through digital radio communication did not differ from the indicators obtained in the tractor cab. (Conclusions) The authors worked out an effective system for wireless information transfer with the ability to calculate the performance of the tested equipment in real time.

Connected Stores, Connected Brands, Connected Consumers, Connected Goods: On Business Model Ecosystems in Internet of Packaging

This paper investigates and discusses roles, initiatives, and potentials for the business model ecosystem to enter business model innovation triggered by digital wireless technologies and capabilities of the Internet of Packaging-enabled smart interactive packaging. This paper develops an overview of the Internet of Packaging technology, wireless digital capabilities, business model innovation, and business model ecosystem in connection to the investigated phenomenon. In this paper, the digital transformation from passive to network-connected enhanced packaging is considered as an accelerator for business model innovation that creates and delivers the value proposition to a wide-ranging business model ecosystem including internal and external participants. Therefore, the governance of the overall business model ecosystem should efficiently reinforce each separate business model, as well as ensure safe and reliable data mobility in the IoP digital infrastructure regarding unique secure digital identifiers.

An automatic optimal excitation frequency tracking method based on digital tracking filters for sandwiched piezoelectric transducers used in broken rail detection

Based on digital tracking filters and wireless communication technology, an automatic optimal excitation frequency tracking method for sandwiched piezoelectric ultrasonic transducers (SPUTs) is proposed. The proposed frequency tracking method uses a variable-step frequency search strategy and the optimal excitation frequency is determined by analyzing the receiving signals in time and frequency domains. Then the field test is carried out by the pitch-catch setup under different test distances: 50 m, 100 m, and 150 m. It is proved that compared with SPUTs excited at series resonance frequency, the FFT (Fast Fourier Transformation) amplitude, power spectrum density and Peak-to-Peak value are greatly improved and the maximum time-frequency energy becomes more concentrated when SPUTs are actuated at the optimal excitation frequency. Specially, the FFT amplitude, power spectrum density and Peak-to-Peak value can achieve the largest increase by 104.42%, 31.54%, 71.36%, respectively when the test distance is equal to 50 m. It can be concluded that the proposed frequency tracking method can efficiently track the optimal excitation frequency and be easy to achieve integration and automation.

Особливості впровадження сучасних цифрових радіотехнологій на мережах зв’язку залізниць

A comparative analysis of digital radio technologies DMR, GSM-R and LTE-R was carried out. The principles of construction and basic technical and operational characteristics of radio equipment and directions of use for technological subscribers of different categories are considered. Recommendations on the introduction of radio equipment of various technologies on networks of mobile radio communications of railways are developed. The most expedient way of introducing digital systems of technological radio communication at the present stage is the use of radio equipment of the standard DMR. It provides the task of "digitization" of conventional radio communication systems and allows modernization of existing analogue networks by gradual replacement of analogue equipment on a digital basis, without violating existing systems of technological radio communication with the partial use of existing infrastructure. GSM-R systems should be used for high-speed train trains. Radio equipment LTE-R is targeted at applications in high-speed trains of passenger trains using automated control systems that require large volumes and speeds of information transmission.The conducted calculations showed a decrease in the radio communication in networks GSM-R and LTE-R, which leads to an increase in the cost of network infrastructure.

Optimization of ZigBee Network Parameters for the Improvement of Quality of Service

Network enabled digital technologies are offering new and exciting opportunities to increase the connectivity of devices for the purpose of home and office automation. ZigBee (IEEE 802.15.4) is such a digital wireless technology that is used for personal area networks. In this paper, an office automation network using the combination of fixed and mobile IEEE 802.15.4 has been deployed and analyzed. The QoS parameters of the network as the performance metrics like throughput, MAC delay and data dropped rate have been investigated. Finally the network has been finalized with the optimized QoS parameters.

Effect of digital wireless technology on the language development of children with cochlear implants

Introduction Hearing is the principal sensory modality by which language and speech are acquired. For that reason, a child with hearing loss whose family chooses an auditory approach for learning language must have as much exposure to high-quality auditory stimulation as possible. Both hearing aids and cochlear implants (CI) are best in quiet and close places, but not so good at a distance, in noise or when sounds bounce around. Children with CI have significant difficulty in hearing conversational speech in the presence of background noise. They may have difficulty understanding soft speech signals due to distance and reverberation. Assistive listening technology is impressive and can be a big help for CI children. So, if CI children have unique needs that are not addressed by his CI, assistive listening devices (ALDs) can be the answer. Using the Roger inspiro system as a wireless communication accessory provides a significant increase in speech understanding in high levels of noise, by its wireless remote microphone. Aims The aim of the study is to monitor the effect of digital wireless technology (Roger inspiro) on the language development of children with cochlear implants. Participants and methods The present randomized case–control study included 20 children with CI using Roger inspiro during rehabilitation sessions as an ALD (11 boys and nine girls) with ages range from 5.3 to 11.6 years with a mean age of 5.9 years as well as 20 age- and sex-matched CI controls without ALD (10 boys and 10 girls). All children in the study or the control groups had bilateral severe to profound sensory neural hearing loss and they used advanced Bionics CI. Phoniatrics and Audiological assessment was done before auditory and language therapy for both groups. Reassessment was done after 6 months of therapy. Result Results show that there is a statistically significant improvement in The Word Intelligibility by Picture Identification (WIPI) scores after rehabilitation and with Roger. However, there is no significant difference between study and control groups as regards receptive, expressive, and total language. Highly significant correlation between WIPI results and expressive language results after therapy with Roger was found. Conclusion Coupling of wireless technology to CIs might help children improving their auditory access. The study supports the use Roger inspiro in enhancing speech perception for children with CI. The preliminary results also show the usefulness of wireless technology in the development of language skills in these children.

Effects of Mobile Phones on Children's and Adolescents' Health: A Commentary.

The use of digital technology has grown rapidly during the last couple of decades. During use, mobile phones and cordless phones emit radiofrequency (RF) radiation. No previous generation has been exposed during childhood and adolescence to this kind of radiation. The brain is the main target organ for RF emissions from the handheld wireless phone. An evaluation of the scientific evidence on the brain tumor risk was made in May 2011 by the International Agency for Research on Cancer at World Health Organization. The scientific panel reached the conclusion that RF radiation from devices that emit nonionizing RF radiation in the frequency range 30kHz-300GHz is a Group 2B, that is, a "possible" human carcinogen. With respect to health implications of digital (wireless) technologies, it is of importance that neurological diseases, physiological addiction, cognition, sleep, and behavioral problems are considered in addition to cancer. Well-being needs to be carefully evaluated as an effect of changed behavior in children and adolescents through their interactions with modern digital technologies.

A Novel Design of Energy-saving Wireless Intelligent Agricultural Detecting System

In order to meet the needs of modern intelligent agricultural detection, this paper designs and develops a novel energy-saving intelligent wireless agricultural detecting system combined with technologies green power supply, wireless transmission and digital control. This system can be powered by green energy resources such as solar energy or wind power and combined with digital control and wireless communication technologies it can achieve collection of a large amount of parameters in terms of modern agricultural cultivation, which will meet the needs of different application scenarios. Results of repeated experiments have shown that it has such advantages as being green and environment-friendly, flexible and reliable.

Benefits of Digital Wireless Technology for Persons with Hearing Aids

Wireless technology for persons with hearing loss began with cumbersome body-worn systems that nevertheless provided speech-recognition benefits in noisy environments. The first ear-level wireless systems were welcomed despite the awkward antenna that extended from the behind-the-ear case. The next-generation, removable, multichannel receiver provided a cost-effective means for school districts to maintain a stock of equipment to be used across students and classrooms. More recently, the advances have been less focused on physical size reductions and more focused on improvements to the signal quality in increasingly noisier environments. Two studies were designed to evaluate the new technological features by Phonak (Phonak, Warrenville, IL) known as adaptive FM and later adaptive digital processing. Each advance in technology resulted in greater gains in speech recognition in noise such that with the adaptive digital system, persons were able to achieve 48% correct in 80- decibels A weighted (dBA) noise levels. Persons with hearing loss using this technology are likely to hear more than persons with normal hearing in high-noise environments.

The Use of Digital Wireless Communication Network Optimization in the Frequency Conversion Technology

in wireless communication network, the digital frequency conversion technology is a core technology, with the development of digital wireless technology, wireless technology is more and more mature, the broadband wireless infrastructure requirements also gradually improve, but because of limited technical level, the current signal in the frequency conversion process, RF signal after many simulation conversion into intermediate frequency, and then in the intermediate frequency conversion to digital, then can carry on the digital frequency conversion, unable to meet the demands of network development, this article discussed the technology of digital frequency wireless communication network optimization based on.

Counting Down the ‘Tot 10’ Highlights of 2013

Counting Down the ‘Tot 10’ Highlights of 2013

A review of assistive listening device and digital wireless technology for hearing instruments.

Assistive listening devices (ALDs) refer to various types of amplification equipment designed to improve the communication of individuals with hard of hearing to enhance the accessibility to speech signal when individual hearing instruments are not sufficient. There are many types of ALDs to overcome a triangle of speech to noise ratio (SNR) problems, noise, distance, and reverberation. ALDs vary in their internal electronic mechanisms ranging from simple hard-wire microphone-amplifier units to more sophisticated broadcasting systems. They usually use microphones to capture an audio source and broadcast it wirelessly over a frequency modulation (FM), infra-red, induction loop, or other transmission techniques. The seven types of ALDs are introduced including hardwire devices, FM sound system, infra-red sound system, induction loop system, telephone listening devices, television, and alert/alarm system. Further development of digital wireless technology in hearing instruments will make possible direct communication with ALDs without any accessories in the near future. There are two technology solutions for digital wireless hearing instruments improving SNR and convenience. One is near-field magnetic induction combined with Bluetooth radio frequency (RF) transmission or proprietary RF transmission and the other is proprietary RF transmission alone. Recently launched digital wireless hearing aid applying this new technology can communicate from the hearing instrument to personal computer, phones, Wi-Fi, alert systems, and ALDs via iPhone, iPad, and iPod. However, it comes with its own iOS application offering a range of features but there is no option for Android users as of this moment.

Counting Down the ‘Tot 10’ Highlights of 2013

Counting Down the ‘Tot 10’ Highlights of 2013

Field Trials and Evaluations of In-Band Digital Radio Technologies: HD Radio and DRM+

This paper depicts the field trials and results for in-band digital radio technologies in Korea. For the in-band methods, HD Radio and DRM+ are considered. In HD Radio, MP3 hybrid mode and MP5 all digital modes are selected, and 4-QAM and 16-QAM are selected for DRM+. To evaluate the practical performance of each technology, system parameters and received electric field strength are evaluated in various test routes and environments. In the field trial, listening tests are also executed by test staffs, and the results of listening tests are analyzed and compared with results of system parameters. Since the trials consider various practical reception environments, the test results can be used as references for decision of digital radio standard.

Mobile MEDLINE

Since the early days of personal digital assistants and wireless technologies, programmers and librarians have been exploring ways to access PubMed. Searching and viewing abstracts on a mobile device require different features than searching from a desktop computer. Mobile access to PubMed is available in several formats, including mobile-optimized websites, MEDLINE-specific apps, mobile citation managers, and journal browser apps. Each of these mobile resources sports its own unique features. Users must try them out and decide which best fit their needs.

Laboratory Trials and Evaluations of In-Band Digital Radio Technologies: HD Radio and DRM+

Many countries are converting their analog communication and broadcasting services into digital services. However, digital radio broadcasting service is still an issue to be addressed. In order to provide digital radio broadcasting service, it is very important to choose the most appropriate digital radio method for their frequency environment and listeners. This paper depicts laboratory test results of in-band digital radio technologies, HD Radio and DRM+. To contribute to decision of digital radio standard and design of digital radio transmission network, various results of many test items are expressed.

Development of a Low Cost Assistive Listening System for Hearing-Impaired Student Classroom

This paper describes the design, development, and tests of a low cost ALS. It was designed for hearing-impaired student classrooms. It utilised digital wireless technology and was aimed to be an alternative to a popular FM ALS. Key specifications include transmitting in 2.4 GHz ISM band with eight selectable transmission channels, battery operated and chargeable, pocket size, and ranged up to thirty metres. Audio characteristics and user tests show that it is comparable to a commercial system, currently employed in our partner school. The results also show that wearing an ALS clearly improves hearing of hearing-impaired students. Long-term usage by school children will be monitored to evaluate the system robustness and durability.

Radio broadcasting’s digital dilemma

Although digital radio broadcasting has undergone significant development over the last quarter-century, no single protocol is poised to break out as a bona fide replacement for traditional analogue radio services. This article illuminates the history and status of radio’s digital transition in an effort to understand its stagnancy. The current state of affairs is due to a variety of factors, including a lack of regulatory engagement with the transition, political and economic shifts in the balance of power between the various broadcaster constituencies involved, and the recalcitrance of receiver manufacturers and listeners to adopt any digital radio broadcast technology. The questions raised by the technologically agnostic nature of radio’s digital malaise beg for deeper scrutiny by media scholars, especially those involved in broadcast research as well as technology and policy studies.