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Ditemukan 10610 dokumen yang sesuai dengan query
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Roberto Verdone, editor
"Pervasive mobile and ambient wireless communications reports the findings of COST 2100, a project of the European intergovernmental COST framework addressing various topics currently emerging in mobile and wireless communications. Drawing on experience developed in this and earlier COST projects, the text represents the final outcome of collaborative work involving more than 500 researchers in 140 institutions and 30 countries (including outside Europe). The book’s subject matter includes : transmission techniques, signal processing, radio channel modelling and measurement, radio network issues, and recent paradigms including ultra-wideband, cooperative, vehicle-to-vehicle and body communications."
London: [, Springer], 2012
e20410857
eBooks  Universitas Indonesia Library
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"Two of the fastest growing sectors of communications today are mobile and Internet, both of which have had a profound effect on people's lives. The convergence between these two sectors not only presents great opportunities for the future of 'unplugged' telecommunications, but also great challenges in understanding the relative position of different technologies in this future.
This book reviews the contribution of different wireless access technologies to that future and looks at the opportunities of opening up access to telecommunications systems, via application programming interfaces (APIs). The economic and regulatory issues associated with wireless communications are also discussed, with a look at the history and potential future of mobility from a user perspective."
London: Institution of Engineering and Technology, 2008
e20452603
eBooks  Universitas Indonesia Library
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Agung Pujo Winarko
"Dalam dunia industri, untuk mengetahui performa mesin motor dapat dilakukan diagnosa menggunakan machinery analyzer. Machinery analyzer yang dibahas pada penelitian ini yaitu Haliza. Terdapat permasalahan dalam melakukan diagnosa mesin motor menggunakan Haliza yaitu penggunaan kabel komunikasi antara sensor kecepatan dan Haliza, yang mengurangi fleksibilitas saat proses diagnosa dilakukan dan waktu pemasangan yang cukup lama. Oleh karena itu, pada penelitian ini akan dilakukan rancang bangun interface untuk modul komunikasi wireless yang akan dipasang pada sensor kecepatan dan Haliza. Rancang bangun interface di kembangkan dengan menggunakan mikrokontroler ATmega16A, sebagai kontroler pada modul wireless RF CC2500. Telah dilakukan pengujian hardware dan software dari modul komunikasi wireless. Dari hasil uji komunikasi diperoleh jangkauan jarak maksimum tanpa BER (Bit Error Rate) sejauh 16 meter pada kecepatan putaran motor 1800 rpm dengan nilai RSSI -79 dBm. Kecepatan putaran motor maksimum yang dapat terukur yaitu 2100 rpm, dengan tingkat kesalahan 0.14% dibandingkan dengan hasil pengukuran tachometer. Untuk uji kehandalan komunikasi wireless, didapatkan tingkat kesalahan rata-rata sebesar 0.09% pada pengujian jarak 10 meter dengan kecepatan 2100 rpm selama 5 jam pengujian.

In the industrial, to know the performance of the machine can be diagnosed using machinery analyzer. Machinery analyzer are discussed in this research that Haliza. There are problems in diagnosing the machine using Haliza namely the use of the communication cable between the speed sensor and Haliza, which reduces the flexibility when the diagnosis is made and the installation of a long time. Therefore, in this report will be conducted design interface for a wireless communication module that will be installed on the speed sensor and Haliza. The design of the interface is developed by using microcontroller ATmega16A, as a controller in the wireless module RF CC2500. The hardware and software of the wireless communication module have been tested. Communication test results obtained maximum distances without the BER (Bit Error Rate) as far as 16 meters at a motor rotating speed of 1800 rpm with RSSI value of -79 dBm. The maximum rotation speed of the motor which can be measured at 2100 rpm, with an error rate of 0.14% compared with the measurement results tachometer. The reliability test of wireless communication, obtained average error rate of 0.09% at the testing distance of 10 meters at a speed of 2100 rpm for 5 hours of testing."
Depok: Fakultas Teknik Universitas Indonesia, 2014
S55695
UI - Skripsi Membership  Universitas Indonesia Library
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Agrawal, Dharma P.
Singapore : Cengage Learning , 2011
384.5 AGR i
Buku Teks  Universitas Indonesia Library
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Pahlavan, Kaveh, 1951-
New York: John Wiley & Sons, 1995
621.381 PAH w (1)
Buku Teks  Universitas Indonesia Library
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Shankar, P. Mohana
"The book presents a comprehensive view of channel degradation arising from fading and shadowing. Various statistical models including simple, hybrid, compound, complex and cascaded ones are presented with detailed derivations along with measures to quantify the deterioration such as the amount of fading, error rates and outage probabilities. The models range from the Rayleigh and Rician through Suzuki, generalized K, cascaded and alpha-mu and similar ones. This is followed by the analysis of mitigation of fading and shadowing through diversity (simple, hybrid, micro- and macro- level) and combining algorithms. The density and distribution functions, error rates and outages are derived and results analyzed to quantify the improvements. The effects of co-channel interference before and after the implementation of diversity are also analyzed. To facilitate easy understanding of the models and analysis, the background information in terms of probability and random variables is presented with relevant derivations of densities of linear and nonlinear transformation of random variables, the sums, products, ratios as well as order statistics of random variables of all types. The book also provides material on digital modems of interest in wireless systems. Thus, the book with 1100+ equations and 350+ Matlab generated figures and tables is an ideal source for students, educators, researchers and professionals in wireless communications allowing access to information currently unavailable."
New York: Springer, 2012
e20425731
eBooks  Universitas Indonesia Library
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"Contents :
- Contents by Author
- University Program Sponsors
- Current Trends and Business Strategies
- The Progression of WIMAX Toward a Peer-to-Peer Paradigm Shift
- Affirming the Mobility Quotient: How Wireless Connectivity Is Shaping Worker
Productivity
- How Small Can It Get?
- Improving the Performance of Mobile Ad Hoc Networks Using Directional Antennas
- Whence and Whither Mobile Communications and Impacting Technologies
- The Evolution of WiMAX Certification
- Prime Time for Mobile Television
- Technologies and Networks
- WLAN Mesh Architectures and IEEE 802.11s
- Wireless Billboard Channels:Vehicle and Infrastructural Support for Advertisement,
Discovery, and Association of UCWW Services
- Leveraging MIMO in Wide-Area Networks
- Revolution by Satellite
- Overview of a Personal Network Prototype
- Smooth Integration of Mobile Video Telephony to Windows Mobile
- The Law of Mobility
- Detecting Packet Mishandling in Mobile Ad Hoc Networks
- Performance of Transport Protocols in Wireless Networks
- The Emergence of the Wireless VoIP Phone
- Effect of Interference and Control Error on Cellular Mobile Communication
Networks
- Seamless Mobility
- Optimizing Video over Wireless Using Performance and Architecture Modeling
- Internetworking of Next-Generation IPv6-Based Mobile Wireless Networks and
MPLS/GMPLS-Based Multiservice Backbone Networks
- Acronym Guide "
Philadelphia: International Engineering Consortium, 2007
e20448098
eBooks  Universitas Indonesia Library
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"Contents :
- Introduction and Background
- Cellular Communications: The First Decade
- Introduction to Personal Communications Services
- Wireless: A New World of Possibilities
- A Layman's Guide to Cellular
- Section I: Business and Marketing Considerations
- Wireless Information Networks
- The Origins of Cellular Communications
- Major Challenges to Wireless Providers
- Implementing Smart Cards in the USA: A Wireless Perspective
- Domestic Spectrum Regulation in the United States
- Cellular/PCS: Complement or Substitute for Wireline Telephony?
- Section II: Wireless Technology and Applications
- Network Issues for Personal Communications Services
- Network Management Systems
- PCS Customer Information System Architectures
- Rural Cellular
- Coding and Modulation: A Tutorial
- Coded Modulation Techniques for Cellular Mobile Systems
- Introduction to Propagation for Mobile and Portable Radio
- Instantaneous Wideband Channel Sounding for 1.7 GHz PCS
- Intelligent Antennas: Spatial Division Multiple Access
- Biological Effects of Radio Frequency Fields
- High-Efficiency DC-DC Converters for Battery-Operated Systems with Energy
Management
- Interoperability of Satellite and Terrestrial Networks
- A Comparative Analysis of Near Earth Satellite Communications Systems
- Propagation Effects in Satellite Systems
- Section III: Wireless Outside the United States
- Wireless Local Loop for Developing Countries - A Technology Perspective
- Wireless Communications in Russia
- Mobile Communications Industry in Thailand
- Evolution of Wireless Applications in Mexico
- History of Wireless in Korea and Present Opportunities for Foreign Companies
- Cellular and Personal Communications in Europe
- Europe, A Crucial Part of Any Global Wireless Strategy
- Wireless Systems in Japan and Associated Issues
- Section IV: The Future
- An Ice Age is Coming to the Wireless World
- Cellular Communications: What's Ahead
- Acronym Guide
- Index "
Chicago: International Engineering Consortium, 1995
e20448144
eBooks  Universitas Indonesia Library
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Imairi Eitiveni
"Tugas akhir ini bertujuan untuk membandingkan Bluetooth dan Zigbee dari segi kinerja mereka, apakah mereka adalah pelengkap atau pesaing satu sama lain. Pada penelitian ini, penulis menggunakan metode studi literatur untuk menganalisis kinerja Bluetooth karena sudah banyaknya sumber-sumber mengenai kinerja Bluetooth yang tersedia. Sedangkan untuk menganalisis kinerja Zigbee, penulis menggunakan simulasi dengan Network Simulator versi 2 dan dilengkapi dengan studi literatur. Laporan ini juga dilengkapi dengan rekomendasi area aplikasi bagi Bluetooth dan Zigbee serta ditutup dengan posisi Zigbee dan Bluetooth dalam Wireless Personal Area Network. Adanya standardisasi, hemat tenaga, dan murah mendukung Zigbee menempatkan diri sebagai salah satu teknologi Wireless Personal Area Network yang diperhitungkan. Besar kemungkinan di masa mendatang, konsumer akan merujuk kepada Zigbee sebagaimana sekarang mereka merujuk pada Bluetooth.

The focus of this study is to compare the performance of Zigbee and Bluetooth, whether they are complementary or competing technologies. Literature study method is used to analyze the performance of Bluetooth regarding the large amount of available Bluetooth resources. A simulative investigation had been conducted to analyze the performance of Zigbee by using Network Simulator version 2, supported with literature study. This report also includes the application areas of Zigbee and Bluetooth and is concluded by stating the position of Zigbee and Bluetooth in WPAN. Standardization, low power, and low cost have placed Zigbee as a competitive technology. Consumers may someday refer to Zigbee the way they now refer to Bluetooth."
Depok: Fakultas Ilmu Komputer Universitas Indonesia, 2009
S-Pdf
UI - Skripsi Open  Universitas Indonesia Library
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"Wireless power transmission is being investigated as a means to operate tiny medical devices such as the capsular endoscope, which is able
to exist for a long period during diagnostic procedures within the body. In this paper, we examine the wireless power transmission to a capsular endoscope by electromagnetic waves to show its usability for medical applications. A modified helical antenna inside the endoscope is proposed as a power receiving antenna, operating at 915 MHz. By calculating a maximum received power in the stomach using such
antenna, the results show that adequate power can be well received. "
[Fakultas Teknik UI, Chiba University], 2011
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Artikel Jurnal  Universitas Indonesia Library
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