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"Propagation engineering in wireless communications covers the basic principles needed for understanding of radiowaves propagation for common frequency bands used in radio-communications. This book includes descriptions of new achievements and new developements in propagation models for wireless communication. The book is intended to bridge the gap between the theoretical calculations and approaches to the applied procedures needed for radio links design in a proper manner. The authors intention is to emphasize propagation engineering by giving sufficient fundamental information and then going on to explain the use of basic principles together with technical achievements in this field."

"ABSTRAKKebutuhan akan komunikasi dan transfer data berkembang pesat di beberapa dekade terakhir. Untuk mendapatkan data transfer yang lebih tinggi, perlu ditentukan peletakan antena yang tepat pada suatu sistem nirkabel. Pada tulisan ini, kami melakukan pengukuran propagasi di lingkungan iklim tropis dan pada rentang UHF ndash; S Band dengan melakukan pengukuran variasi jarak dari 10 m ndash; 100 m pada frekuensi 800 MHz, 1.8 GHz, 2.4 GHz, dan 3.3 GHz.Hasil pengukuran dibandingkan dengan nilai perhitungan dengan model-model propagasi seperti Free-Space Loss, Okumura-Hata urban dan Okumura-Hata suburban. Kemudian dianalisa untuk mengetahui pengaruh jarak terhadap kuat medan yang diperoleh. Setelah dilakukan pengukuran dan perhitungan, nilai daya yang diterima menurun seiring dengan jarak yang bertambah dan hal ini berlaku pada setiap frekuensi. Terdapat beberapa penyimpangan saat pengukuran karena pengaruh dari lingkungan sekitar. Dari kuat medan yang diperoleh tersebut dilakukan perhitungan kapasitas kanal Shannon yang kemudian dianalisa untuk mengetahui pengaruh dari kuat medan terhadap kapasitas kanal. Nilai kapasitas kanal yang diperoleh menurun seiring dengan menurunnya nilai kuat medan yang diperoleh. Hasil ini dapat digunakan untuk mengetahui kapasitas kanal maksimum dengan memperhatikan konfigurasi antena terbaik berdasarkan daya yang diterima.

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ABSTRACTCommunication and data transfer demands are growing fast in last few decades. To obtain a higher data transfer, it is necessary to determine proper antenna placement in a wireless system. In this paper, we conduct a propagation measurements in tropical environments and UHF S Band frequency by conducting distance variation from 10 m ndash 100 m at frequency 800 MHz, 1.8 GHz, 2.4 GHz, and 3.3 GHz.The measurement results were compared with the calculation result which has been calculated using propagation models such as Free Space Loss, urban Okumura Hata and suburban Okumura Hata. The result were analyzed to determine the effect of distance to the field strength obtained. After measurement and calculation, the received power level decreases as the distances increases and this applies to every frequency. There are several deviations during measurement due to the influence of the surrounding environment. Shannon channel capacity were calculated using the field strength obtained. The result were analyzed to determine the effect of field strength to channel capacity. The value of obtained channel capacity decreases as the field strength value obtained decreases. This result can contribute to determine the maximum channel capacity by considering an optimum antenna configuration based on received power levels."

"The field of radio communications continues to change rapidly and the second edition of this outstanding book, based on a popular IEE Vacation School, has been fully updated to reflect the latest developments. The introduction of new services and the proliferation of mobile communications have produced a growing need for wider bandwidths and the consequent need for frequency reuse. This book introduces the basic concepts and mechanisms of radiowave propagation engineering in both the troposphere and ionosphere, and includes greater emphasis on the needs of digital technologies and new kinds of radio systems. The content reflects the wide experience of an exceptional group of authors and the emphasis throughout is on modelling and prediction methods and the relevant ITU Radiocommunication sector recommendations. Propagation of Radiowaves, 2nd Edition is essential reading for professionals involved in planning, designing and operating radio systems."

"The book briefs you on energy propagation around and into the body and how to estimate performance of on-body wireless links, and then dives into the nuts-and-bolts of designing antenna systems that deliver the goods. It covers on-body communication channels at microwave frequency bands and at low frequency bands, as well as ultra wideband systems for WPANs and WBANs. You get details on body-centric UWB antennas and channels, as well as advances in wearable mobile, EBG, and ?smart fabric? antennas for cellular and WLAN communications. Chapters on telemedicine applications, such as remote diagnoses, and implantable medical devices cover crucial propagation issues and other obstacles that need to be addressed. Rounding out the coverage is a section on antenna design for body-sensor networks and their emerging military and space applications. Packed with hands-on guidance from noted experts, this volume will be indispensable for your efforts in designing and improving body-centric communication systems. (Publisher)"

"ABSTRAKUntuk menilai performa dari sistem komunikasi tanpa kabel, salah satu yang sangat diperlukan adalah menghitung kemampuan dalam memperoleh informasi. Performa dari beberapa sistem ditentukan oleh kapasistas kanal dari sistem tersebut. Tentunya, semakin besar kapasitas kanal dari sebuah sistem akan semakin baik sistem tersebut dimana kemampuan untuk memperoleh informasi akan semakin besar. Kebutuhan akan kapasitas kanal yang maksimal tentunya sangat mendasar mengingat akan kebutuhan manusia akan komunikasi yang terus meningkat. Pada tesis dibahas tentang analisis kapasitas kanal menggunakan pengukuran propagasi gelombang pada frekuensi UHF- S Band dengan karakterisasi ketinggian. Analisis ini bertujuan untuk mengetahui besar kapasitas kanal pada beberapa ketinggian yang diukur. Perhitungan kapasitas kanal menggunakan persamaan yang merepresentasikan kapasitas kanal, yaitu teorema kapasitas kanal Shannon Shannon channel capacity theorem .Pengukuran dilakukan pada frekuensi 800 MHz, 1800 MHz, 2400 MHz dan 3300 MHz di lingkungan Fakultas Teknik Universitas Indonesia. Pengukuran dilakukan dengan meletakan antena penerima dengan ketinggian yang tetap yaitu 2 m sedangkan antena penerima diletakan pada ketinggian 1 m, 2 m, 5 m, 10 m, dan 15 m. Pada masing masing frekuensi dilakukan pengukuran dengan tiga kondisi yaitu dengan menghadapkan antena ke atas, ke tengah dan ke bawah.Hasil pengukuran kemudian diolah dan dianalisa untuk melihat pengaruh variasi ketinggian penempatan antena pengirim dan penerima terhadap kapasitas kanal. Dengan melihat keseluruhan hasil perhitungan kapasitas kanal dari hasil pengukuran pada masing masing frekuensi, dapat kita ketahui bahwa kapasitas kanal akan menurun ketika antena pengirim diletakan semakin tinggi dari permukaan tanah. Dengan kata lain, kapasitas kanal terbesar adalah ketika antena pengirim ditempatkan lebih dekat ke tanah.

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ABSTRACTTo assess the performance of a wireless system, one needs to quantify its ability to handle information. Typically, the performance of such systems is Characterized in terms of the channel capacity. Obviously, the greater the channel capacity of a system, the better the system where the ability to obtain information will be greater. The need for maximum channel capacity is certainly very fudamental, because the human need for communication is immediately increase. This thesis discusses about Analysis of Channel Capacity Through Wave Propagation Measurement in UHF S Band Frequency WIth High Characterization. This analysis aims to determine the capacity of the canal at some high measurement. Calculation of channel capacity uses an equation representing channel capacity, which is Shannon channel capacity theorem.The measurements are made at frequencies of 800 MHz, 1800 MHz, 2400 MHz and 3300 MHz in the Faculty of Engineering Universitas Indonesia. The measurement is done by placing the receiving antenna with a fixed height of 2 m while the receiving antenna is placed at 1 m, 2 m, 5 m, 10 m, and 15 m. At each frequency is measured with three conditions that is by facing the antenna up, to the middle and down.The results of these measurements will be processed and analyzed to see the effect of high variations in the placement of the transmitter and receiver antenna to channel capacity. By looking at the overall calculation of channel capacity from measurement results on each frequency, we can know that the channel capacity will decrease when the transmitter antenna is placed higher. In other words, the largest channel capacity is when the transmitter antenna is placed closer to the ground."

"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 "