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Hasil Pencarian

Ditemukan 12108 dokumen yang sesuai dengan query
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Rappaport, Theodore S., 1960-
New Jersey: Prentice-Hall, 1996
621.382 RAP w
Buku Teks  Universitas Indonesia Library
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Rappaport, Theodore S., 1960-
Upper Saddle River: Prentice-Hall, 2002
621.382 RAP w
Buku Teks  Universitas Indonesia Library
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Adhi Mahendra
"Salah satu tantangan utama dalam dunia telekomunikasi adalah menyediakan jasa Iayanan data berkecepatan tinggi. Kondisi keadaan pada saat ini, dengan teknologi broadband wireless yang ada dapat memberikan suatu cakupan area yang luas serta mampu dalam layanan data berkecepatan tinggi yang mengaplikaslkan multimedia.
Salah salu upaya untuk menyediakan jasa layanan data berkecepatan tinggi adalah dengan melakukan teknik diversitas Dimana dalam hal ini adalah teknik diversitas yang dilakukan adalah teknik divertisitas ruang (Space diversity technique).
Dalam tesis ini dilakukan simulasl teknik Space Time Block Coding (STBC) dan Space Frequency Block Coding (SFBC). Simulasi yang dilakukan adalah dengan memakai teknik pemancar tunggal clan pemancar ganda serta teknik penerima tunggal dan ganda.
Hasil pengujian menunjukkan bahwa teknik space time coding dan space frequency block coding dengan memakai teknik pemancar dan penerima ganda memiliki perfomansi yang balk dibandinkan memakai teknik pemancar tunggal penerima ganda atau sebaliknya.

One of the main challenge in telecommunication is to provide high speed data services. ln this recent condition, the broadband wireless technology could provide high scope coverage area and able to provide high speed data services using multimedia applications.
One of the efforts to proved high speed data services is to diversity technique, which means that we use space diversity technique.
ln this theses, we would use technique simulation space time block coding (STBC) and space frequency block coding (SFBC). ln this simulation we use single transmitter technique and multiple transmitter technique; we also use single receiver and multiple receiver technique.
This test result showed that using double transmitter and receiver technique in space time block coding technique and space frequency block coding will have a better performance compare to using single transmitter technique multiple receiver or on the contrary."
Depok: Fakultas Teknik Universitas Indonesia, 2005
T16115
UI - Tesis Membership  Universitas Indonesia Library
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Feher, Kamilo
Upper Saddle River, N.J. : Prentice-Hall, 1995
621.384 5 FEH w
Buku Teks  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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Agrawal, Dharma P.
Singapore : Cengage Learning , 2011
384.5 AGR i
Buku Teks  Universitas Indonesia Library
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Brehmer, Johannes
"This monograph develops a framework for modeling and solving utility maximization problems in nonconvex wireless systems. The first part develops a model for utility optimization in wireless systems. The model is general enough to encompass a wide array of system configurations and performance objectives. Based on the general model, a set of methods for solving utility maximization problems is developed in the second part of the book. The development is based on a careful examination of the properties that are required for the application of each method. This part focuses on problems whose initial formulation does not allow for a solution by standard methods and discusses alternative approaches. The last part presents two case studies to demonstrate the application of the proposed framework. In both cases, utility maximization in multi-antenna broadcast channels is investigated."
Berlin: [, Springer], 2012
e20418198
eBooks  Universitas Indonesia Library
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"This book constitutes the refereed proceedings of the 11th International Conference on Ad-hoc, Mobile, and Wireless Networks, ADHOC-NOW 2012 held in Belgrade, Serbia, July 9-11, 2012. The 36 revised full papers presented were carefully reviewed and selected from 76 submissions. The accepted papers cover a wide spectrum of traditional networking topics ranging from routing to the application layer, to localization in various networking environments such as wireless sensor and ad-hoc networks, and give insights in a variety of application areas."
Berlin: Springer, 2012
e20406327
eBooks  Universitas Indonesia Library
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"This book constitutes the thoroughly refereed post-conference proceedings of the Third International ICST Conference Mobile Lightweight Wireless Systems (MOBILIGHT 2011) held in Bilbao, Spain on May 9-10. 2011. In numbers, MOBILIGHT 2011 was organized as a 2-day single-track event with 18 technical presentations, and 3 specialized workshops focused on opportunistic sensing and processing in mobile wireless sensor and cellular networks (MOBISENSE), multimode wireless access networks (MOWAN) and strategic network planning applied to market regulation (NETSTRAT), totaling to 34 papers presented during the conference and included in the proceedings"
Heidelberg: Springer, 2012
e20409692
eBooks  Universitas Indonesia Library
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Hendra Cahya Mustafa
"Spektrum frekuensi radio merupakan sumber daya alam yang jumlahnya terbatas. Diperlukan penataan alokasi spektrum secara baik dalam mengoptimalkan penggunaannya, salah satunya adalah frekuensi sharing. Kepdirjen no.119/DIRJEN/2000 Indonesia mengijinkan adanya penggunaan bersama frekuensi 3.5 GHz antara dinas tetap satelit (Fixed Satellite Service) dan layanan akses pita lebar berbasis nirkabel (Broadband Wireless Access).
Kurangnya pertimbangan teknis dan ketidaksiapan badan regulasi menyebabkan timbulnya permasalahan interferensi sehingga terjadi kerusakan data dan putusnya layanan FSS. Oleh karena itu, dilakukan revisi terhadap kepdirjen sebelumnya dengan Rancangan Peraturan Menteri Komunikasi Dan Informatika Nomor: /PER/M.KOMINFO/.../2007 yang isi diantaranya, pada pasal 16 ayat 3 menyebutkan bahwa penyelenggara BWA eksisting pada pita frekuensi radio 3.5 GHz wajib migrasi ke pita frekuensi radio 3.3 GHz selambat-lambatnya 2 tahun sejak ditetapkan.
Disimulasikan frekuensi sharing 3.5 GHz antara FSS dan BWA dengan software SPECTRAemc untuk daerah Jakarta. Selanjutnya diusulkan teknik mitigasi interferensi yang dapat digunakan agar kedua layanan tersebut tetap beroperasi dengan baik hingga batas dilakukannya migrasi yaitu 2 tahun mendatang.

Radio frequency spectrum is a limited natural resources which needed good management to optimalize its use, one of the way is sharing frequency. No.119/Dirjen/2000 Indonesian kepdirjen permit the co-existence of frequency usage in 3.5 GHz between Fixed Satellite Service and Broadband Wireless Access.
Lack of technical consideration and awareness of national regulator causes interference problems that disrupt FSS services. Therefore, revision has been done to the previous kepdirjen with Number: /PER/M.KOMINFO/.../2007 which one of the content is, section 16 article 3, mention that eksisting BWA organizer at frequency band 3.5 GHz must be migrated to the frequency band 3.3 GHz at the latest 2 year since specified.
Simulated sharing frequency at 3.5 GHz between BWA and FSS with SPECTRAemc software for Jakarta area. Hereinafter proposed the interference mitigation technique that able to be used to ensure both of the services remain to operate well until the next 2 years.
"
Depok: Fakultas Teknik Universitas Indonesia, 2008
S40455
UI - Skripsi Open  Universitas Indonesia Library
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