Radio equipment

Xem 1-20 trên 59 kết quả Radio equipment
  • Tuyển tập các báo cáo nghiên cứu khoa học ngành toán học được đăng trên tạp chí toán học quốc tế đề tài: Decision making for cognitive radio equipment: analysis of the first 10 years of exploration

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Decision making for cognitive radio equipment: analysis of the first 10 years of exploration

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  • Tham khảo tài liệu 'báo cáo hóa học: "decision making for cognitive radio equipment: analysis of the first 10 years of exploration"', luận văn - báo cáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • I enjoyed reading this book for a number of reasons. One reason is that it addresses high-speed analog design in the context of microwave issues. This is an advanced level book, which should follow courses in basic circuits and transmission lines. Most analog integrated circuit designers in the past worked on applications at a low enough frequency that microwave issues did not arise. As a consequence, they were adept at lumped parameter circuits and often not comfortable with circuits where waves travel in space.

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  • Cognitive radio is a hot research area for future wireless communications in the recent years. In order to increase the spectrum utilization, cognitive radio makes it possible for unlicensed users to access the spectrum unoccupied by licensed users. Cognitive radio let the equipments more intelligent to communicate with each other in a spectrum-aware manner and provide a new approach for the co-existence of multiple wireless systems.

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  • A search for ‘Software Defined Radio’ on Amazon.com at the end of 2010 shows that almost 50 books have been written on the subject. The earliest book was published in 2000 and a steady stream of new titles has been coming out since. So why do I think that yet another book is warranted? SDR is now a mature field, but most books on the subject treat it as a new technology and approach SDR from a theoretical perspective. This book brings SDR down to earth by taking a very practical approach. The target audience is practicing engineers and graduate students using SDR as a tool rather...

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  • The GSM Recommendation The early 1980s were marked by the development of a number of national and incompatible radio networks in Europe; see Table 1.2 and Figure 1.3. The seven different mobile radio networks made the prospect of the mobile telephone unattractive to many potential customers because of high tariffs and equipment costs. For this reason, at its general meeting in Vienna in June 1982, CEPT (see Appendix B.2.2) decided to develop and standardize a Pan-European cellular mobile radio network.

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  • Cordless Telephone Systems Cordless telephone systems are mobile radio systems that, although their transmission range is not suitable for wide-area coverage, are attractive to many users because of the services offered and their low cost. Cordless telephony (CT) can be used within the area of a subscriber line, and provides a radio link within a radius of approximately 50 m inside a building or 300 m outdoors between the fixed terminal and a mobile part.

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  • Other Public Mobile Radio Systems 4.1 Airline Telephone Network for Public Air–Ground Communication In 1993 ETSI RES 5 submitted a standard for the Terrestrial Flight Telephone System (TFTS), specifying the radio interface and the interfaces to public telecommunications networks. At the same time the European Airlines Electronic Committee (EAEC) specified the airline equipment and interfaces to cabin facilities. Commercial operations began in 1994.

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  • Wireless network refers to any type of computer network that is not connected by cables of any kind. It is a method by which homes, telecommunications networks and enterprise (business) installations avoid the costly process of introducing cables into a building, or as a connection between various equipment locations.[1] Wireless telecommunications networks are generally implemented and administered using a transmission system called radio waves. This implementation takes place at the physical level (layer) of the OSI model network structure....

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  • Every year, tens of thousands of young engineers and university graduates enter the fascinating professional field of radio frequency (RF) design. Most of them have a reasonable understanding of applied mathematics and physics, circuit theory, electromagnetism, and electronics as well as computers and programming.

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  • Crystal radio receiver - also known as crystal receiver - radio is a simple yet very common in the early days of radio industry. No batteries or other power source to an activity that uses the power received from radio waves through a very long wire antenna and high. In Vietnam, formerly known as Galen

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  • Improving Grade of Service (GOS) While Reducing RF Channels Wireless service providers are adopting new deployment strategies to reduce network costs and improve quality of service. In one urban market, a major national wireless service provider has improved network traffic loading and significantly boosted network RF performance by centralizing radio equipment and deploying digital RF transport technology. The digital RF transport systems operate in simulcast mode and reproduce the signal at radiating points throughout the network.

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  • This training manual is suitable for use on board vessels of various types engaged on internationl voyages and on vessels that operate their own domestic but which carry lifeboats.The document fully complies with regulation 35 of the 1996 amendments to the international convention for the safety of life a sea 1974

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  • AMPLITUDE MODULATED RADIO TRANSMITTER A radio signal can be generated by causing an electromagnetic disturbance and making suitable arrangements for this disturbance to be propagated in free space. The equipment normally used for creating the disturbance is the transmitter, and the transmitter antenna ensures the efficient propagation of the disturbance in free space. To detect the disturbance, one needs to capture some finite portion of the electromagnetic energy and convert it into a form which is meaningful to one of the human senses...

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  • This volume contains the proceedings of the Second International Conference on Biomedical Electronics and Devices (BIODEVICES 2009), organized by the Institute for Systems and Technologies of Information Control and Communication (INSTICC), technically co-sponsored by the IEEE Engineering in Medicine and Biology Society (EMB), in cooperation with AAAI and endorsed by IFMBE.

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  • AN INTRODUCTION TO CELLULAR PHONE SYSTEMS The first mobile communications system began in 1921 when the Detroit Police Department installed two-way radios in its cars. The equipment was bulky, awkward, and a drain on automobile batteries, but it proved its worth. Soon police and fire departments throughout the country were installing two-way radio equipment in their fleets. Eventually someone realized that private individuals could also benefit from being able to talk with the outside world from their cars, and the first commercial mobile telephone service was instituted in St.

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  • Novel generation wireless system is a packet switched wireless system with wide area coverage and high throughput. It is designed to be cost effective and to provide high spectral efficiency . The 4th wireless uses Orthogonal Frequency Division Multiplexing, Ultra Wide Radio Band and millimeter wireless and smart antenna. Highly directive, planar UWB antennas are gaining more and more attention, as required in many novel and important applications.

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  • QUY CHUẨN KỸ THUẬT QUỐC GIA QCVN 37: 2011/BTTTT VỀ THIẾT BỊ VÔ TUYẾN LƯU ĐỘNG MẶT ĐẤT CÓ ĂNG TEN LIỀN DÙNG CHO THOẠI TƯƠNG TỰ National technical regulation on land mobile radio equipment using an integral antenna intended primarily for analogue speech 1. QUY ĐỊNH CHUNG 1.1.

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  • QUY CHUẨN KỸ THUẬT QUỐC GIA QCVN 43:2011/BTTTT VỀ THIẾT BỊ VÔ TUYẾN LƯU ĐỘNG MẶT ĐẤT CÓ ĂNG TEN RỜI DÙNG CHO THOẠI TƯƠNG TỰ National technical regulation on land mobile radio equipment having an antenna connector intended primarily for analogue speech

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