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Synchronization techniques for 3GPP-LTE
ISBN: 9783659223853 / Angielski / Miękka / 52 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. To deal with the increasing demands on the mobile radio systems and data traffic, a successor of UMTS has been worked on, called Long Term Evolution (LTE). This will permit more powerful and better spectral efficiency of the transmission. Orthogonal Frequency Division Multiple Access (OFDMA) is used in the LTE downlink as a multiple access method. The uplink in the same is dependent on another method, Single carrier frequency division multiple access (SC-FDMA). The advantage of the method is that the signals exhibit lower peak to average power ratio (PAPR). In this thesis, we focused on the...
To deal with the increasing demands on the mobile radio systems and data traffic, a successor of UMTS has been worked on, called Long Term Evolution (...
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cena:
218,66 |
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Low Threshold and Better Gain Charge Pump
ISBN: 9783659225413 / Angielski / Miękka / 100 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. A Charge pump circuit provides a voltage that is higher than the voltage of the power supply or a voltage of reverse polarity. Increased voltage levels are obtained in a charge pump as a result of transferring charges to a capacitive load, and do not involve amplifiers or regular transformers. Charge pumps usually operate at a high- frequency level in order to increase their output power within a reasonable size of total capacitance used for charge transfer. This operating frequency may be adjusted by compensating for changes in the power requirements and saving the energy delivered to the...
A Charge pump circuit provides a voltage that is higher than the voltage of the power supply or a voltage of reverse polarity. Increased voltage level...
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cena:
218,66 |
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The Microstrip Transmission Line on Semiconductor Substrate
ISBN: 9783659226489 / Angielski / Miękka / 60 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The progress of electronics, radio engineering science, radio physics and communications advanced on improvements of physical, technological and circuit principles, methods and techniques of realization of any devices. One of many elements, which have interest for realizations miniature devices in microwave rang of frequency, is Сontrollable Micro-Strip transmission Line, made on Semiconductor Substrate (CMSLSS). This paper is about making model of CMSLSS, designing of software modulus for numerical simulation parameters and characteristics CMSLSS and receipt numerical results of this...
The progress of electronics, radio engineering science, radio physics and communications advanced on improvements of physical, technological and circu...
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cena:
218,66 |
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Interferometers in SOI-Technology for Use in Telecommunications
ISBN: 9783838134109 / Angielski / Miękka / 140 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This PhD thesis describes the realization of integrated optical components in Silicon-on-Insulator (SOI) material. In particular, the thesis is focused on the realization of Mach-Zehnder delay interferometers (MZ-DI) in 4um SOI technology. As an example, the ability of MZ-DI for the demodulation of phase-modulated data signals is investigated. The thesis considers in detail the design of the basic components for the realization of MZ-DIs in SOI technology. These components are single-mode waveguides and multi-mode interference (MMI) couplers. Following simulations and iterations of the...
This PhD thesis describes the realization of integrated optical components in Silicon-on-Insulator (SOI) material. In particular, the thesis is focuse...
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cena:
311,93 |
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Design of Square Patch Microstrip Antenna for Circular Polarization
ISBN: 9783848445387 / Angielski / Miękka / 76 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Communication between humans was first by sound through voice. With the desire for slightly more distance communication came, devices such as drums, then, visual methods such as signal flags and smoke signals were used. These optical communication devices, of course, utilized the light portion of the electromagnetic spectrum. It has been only very recent in human history that the electromagnetic spectrum, outside the visible region, has been employed for communication, through the use of radio. One of humankinds greatest natural resources is the electromagnetic spectrum and the antenna has...
Communication between humans was first by sound through voice. With the desire for slightly more distance communication came, devices such as drums, t...
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cena:
218,66 |
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Verificador Biometrico Multimodal Embebido
ISBN: 9783659036910 / Hiszpański / Miękka / 320 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Los sistemas de verificacion de identidad biometricos han reportado ciertas limitaciones en la exactitud. En la medida en que se combinan mas de una modalidad para resolver la decision, el desempeno mejora. En esta investigacion se conjugan un clasificador por voz y uno por huella dactilar combinados con una arquitectura en paralelo, fusionando los puntajes de ambos clasificadores mediante el promedio geometrico ponderado. La voz se parametrizo con 12 Coeficientes Cepstrales en la escala de Frecuencia Mel MFCC y su Energia, incluyendo su derivada y su aceleracion. Con estos parametros se...
Los sistemas de verificacion de identidad biometricos han reportado ciertas limitaciones en la exactitud. En la medida en que se combinan mas de una m...
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cena:
397,16 |
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Channel Estimation In Mobile Wireless Systems
ISBN: 9783659202728 / Angielski / Miękka / 68 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The Channel Estimation in Mobile Wireless Systems is a technique used in estimating the time-varying channel from mobile user equipment (UE). This technique helps the mobile wireless systems to combat multipath propagation fading and Doppler shifts caused by user mobility. Channel Estimation significantly improves the performance of the mobile wireless communication systems where the channel changes over time, especially for 4G and Long Term Evolution (LTE) systems. The channel estimation helps mobile wireless systems to achieve high data rate, high capacity and reliable communication. There...
The Channel Estimation in Mobile Wireless Systems is a technique used in estimating the time-varying channel from mobile user equipment (UE). This tec...
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cena:
218,66 |
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High-level SOC Modeling and Performance Estimation
ISBN: 9783659210891 / Angielski / Miękka / 152 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The objective of this book is to provide the system designer with means (on the methodology and tools levels) to estimate systems performances and evaluate rapidly and very early the design decisions in the SoC design flow. Our work provides contributions in two main aspects: (1) On the Conceptual Level, we defined (using the UML meta-modeling concepts) modeling concepts to estimate shared resources impact on systems overall performances, by introducing the "virtual node" concept for scheduling and shared resources access control. Furthermore, we introduced the "Communication Pattern" concept...
The objective of this book is to provide the system designer with means (on the methodology and tools levels) to estimate systems performances and eva...
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cena:
263,29 |
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Diagnosis and Control of Plasma Instabilities in TOKAMAKs
ISBN: 9783659230813 / Angielski / Miękka / 172 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. |
cena:
303,45 |
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High-Frequency Low-Power Local Oscillator Generation
ISBN: 9783659232190 / Angielski / Miękka / 152 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. With rapid development in the area of RF and wireless communication, the interest in frequency synthesizers has grown rapidly in the last few years. Frequency synthesizer is used for local oscillator (LO) generation. In this thesis, our aim is to explore high-frequency low-power LO generation in CMOS technology. We focus on three most power-hungry blocks in a frequency synthesizer, which dominate the total power consumption due to their high-frequency operation, namely voltage-controlled oscillator (VCO), frequency divider and frequency multiplier, as these circuits are the bottleneck to...
With rapid development in the area of RF and wireless communication, the interest in frequency synthesizers has grown rapidly in the last few years. F...
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cena:
263,29 |
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Impatt Integrated Microstrip Filters
ISBN: 9783659234248 / Angielski / Miękka / 100 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. A theoretical investigation of IMPATT diode integrated microstrip low-pass filter and band-pass filter is proposed. In which the cutoff frequency of low-pass filter and bandwidth of band-pass filter is tunable by means of bias voltage of IMPATT diode without changing the dimensions of the microstrip lines. This work can satisfy the day by day increasing demand of tunable filters for microwave applications. This work presents the design, simulation and synthesis of IMPATT integrated microstrip low-pass filter and band-pass filter using coupled microstrip line through Advanced Design System...
A theoretical investigation of IMPATT diode integrated microstrip low-pass filter and band-pass filter is proposed. In which the cutoff frequency of l...
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cena:
218,66 |
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Problems and Solution in Microwave, RF, and Optical Communication
ISBN: 9783659235542 / Angielski / Miękka / 100 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This Book is intended as an Introductory text on Microwave Circuits, Devices and transmission line. It Contains Comprehensive up to date problems and solutions for a standard level on Transmission Lines, Optical Fiber Communication, TE modes, Rectangular waveguide, Cylindrical waveguide Microstrip, and Microstrip components such as Capacitance, Inductance, Short/Open stub, Transformer, Resonator and their Applications.
This Book is intended as an Introductory text on Microwave Circuits, Devices and transmission line. It Contains Comprehensive up to date problems and ...
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cena:
218,66 |
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Ahorro de Energia
ISBN: 9783846575703 / Hiszpański / Miękka / 116 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Para poder utilizar de manera efectiva los LEDs en iluminacion es necesario hacer el analisis y diseno de ciertos factores. Los principales tres factores a considerar son el diseno electronico, el diseno termico y el diseno optico. La parte electronica se refiere a como se van a conectar los LEDs y a como se les va a suministrar energia a los LEDs. Esto implica disenar una fuente de corriente constante para la luminaria de LEDs. La parte termica se refiere a que se tiene que disenar la manera de disipar el calor, pues el desempeno de los LEDs se reduce bastante con el aumento de la...
Para poder utilizar de manera efectiva los LEDs en iluminacion es necesario hacer el analisis y diseno de ciertos factores. Los principales tres facto...
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cena:
174,04 |
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Problems and Solutions in Antenna & Propagation, Satellite & Radar
ISBN: 9783848445394 / Angielski / Miękka / 84 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. In parallel with the wireless communication growth, the need for higher quality transmission and wider coverage rises. As a result of that, a better use of the electromagnetic radiation wavelength is developed; in order to achieve that a better and deeper understanding of the antennas specifications and properties is highly needed. This book is introduced to provide and help the readers to achieve a better understanding of the antennas field. The problems and solutions introduced are covering most of the very difficult parts of the field. It provides the solutions of different types of...
In parallel with the wireless communication growth, the need for higher quality transmission and wider coverage rises. As a result of that, a better u...
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cena:
218,66 |
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Techniques for Noise Robustness in Automatic Speech Recognition
ISBN: 9781119970880 / Angielski / Twarda / 514 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Automatic speech recognition (ASR) systems are finding increasing use in everyday life. Many of the commonplace environments where the systems are used are noisy, for example users calling up a voice search system from a busy cafeteria or a street. This can result in degraded speech recordings and adversely affect the performance of speech recognition systems. As the use of ASR systems increases, knowledge of the state-of-the-art in techniques to deal with such problems becomes critical to system and application engineers and researchers who work with or on ASR technologies. This book... Automatic speech recognition (ASR) systems are finding increasing use in everyday life. Many of the commonplace environments where the systems are ... |
cena:
521,33 |
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Essentials of Machine Olfaction and Taste
ISBN: 9781118768488 / Angielski / Twarda / 336 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This book provides a valuable information source for olfaction and taste which includes a comprehensive and timely overview of the current state of knowledge of use for olfaction and taste machines
This book provides a valuable information source for olfaction and taste which includes a comprehensive and timely overview of the current state of...
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cena:
705,41 |
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Signals and Transforms in Linear Systems Analysis
ISBN: 9781461432869 / Angielski / Twarda / 375 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Signals and Transforms in Linear Systems Analysis covers the subject of signals and transforms, particularly in the context of linear systems theory. Chapter 2 provides the theoretical background for the remainder of the text. Chapter 3 treats Fourier series and integrals. Particular attention is paid to convergence properties at step discontinuities. This includes the Gibbs phenomenon and its amelioration via the Fejer summation techniques. Special topics include modulation and analytic signal representation, Fourier transforms and analytic function theory, time-frequency analysis and...
Signals and Transforms in Linear Systems Analysis covers the subject of signals and transforms, particularly in the context of linear systems theory. ...
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cena:
401,58 |
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Media Access Control and Resource Allocation: For Next Generation Passive Optical Networks
ISBN: 9781461439387 / Angielski / Miękka / 111 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This book focuses on various Passive optical networks (PONs) types, including currently deployed Ethernet PON (EPON) and Gigabit PON (GPON) as well as next generation WDM PON and OFDM PON. Also this book examines the integrated optical and wireless access networks. Concentrating on two issues in these networks: media access control (MAC) and resource allocation. These two problems can greatly affect performances of PONs such as network resource utilization and QoS of end users. Finally this book will discuss various solutions to address the MAC and resource allocation issues in various PON...
This book focuses on various Passive optical networks (PONs) types, including currently deployed Ethernet PON (EPON) and Gigabit PON (GPON) as well as...
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cena:
200,77 |
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Interoperabilidad En Redes de Sensores Para Monitorizacion Submarina
ISBN: 9783659022609 / Hiszpański / Miękka / 224 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. La instrumentacion oceanografica presenta a dia de hoy un problema de interoperabilidad debido a la diversidad de protocolos utilizados en los equipos de medida. Para asegurar la calidad y fiabilidad en el sistema de instrumentacion se deben definir procedimientos y normativas a seguir durante la realizacion de las medidas, lo que implica el uso de diferentes estandares, que como en la mayoria de sistemas de medida distribuidos requieren una sincronizacion. Dos son las lineas presentadas en este trabajo de Tesis: El estudio y desarrollo de nuevos estandares o la ampliacion de los ya...
La instrumentacion oceanografica presenta a dia de hoy un problema de interoperabilidad debido a la diversidad de protocolos utilizados en los equipos...
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cena:
307,91 |
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Convertidores Electronicos de Potencia
ISBN: 9783659047220 / Hiszpański / Miękka / 80 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. En este trabajo se presentan los detalles sobre la implementacion de convertidores electronicos para ser utilizados en la ensenanza de la electronica de potencia; por un lado se presenta un Rectificador Trifasico Controlado (Convertidor CA-CC) y por otro un Inversor Trifasico (Convertidor CC-CA). Se exponen los fundamentos teoricos que explican acerca del funcionamiento de ambos dispositivos y se detallan las diferentes caracteristicas tecnicas utilizadas en la construccion del hardware de los mismos. Utilizando herramientas de simulacion se obtienen resultados para ser comparados luego con...
En este trabajo se presentan los detalles sobre la implementacion de convertidores electronicos para ser utilizados en la ensenanza de la electronica ...
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cena:
129,41 |
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