Описание: This book investigates adaptive physical-layer beamforming and resource allocation that ensure reliable data transmission in the multi-antenna broadcast channel. The book provides an overview of robust optimization techniques and modelling approximations to deal with stochastic performance metrics. One key contribution of the book is a closed-form description of the achievable rates with unlimited transmit power for a rank-one channel error model. Additionally, the book provides a concise duality framework to transform mean square error (MSE) based beamformer designs, e.g., quality of service and balancing optimizations, into equivalent uplink filter designs. For the algorithmic solution, the book analyses the following paradigm: transmission to receivers with large MSE targets (low demands) is switched off if the transmit power is low. The book also studies chance constrained optimizations for limiting the outage probability. In this context, the book provides two novel conservative outage probability approximations, that result in convex beamformer optimizations. To compensate for the remaining inaccuracy, the book introduces a post-processing power allocation. Finally, the book applies the introduced beamformer designs for SatCom, where interference from neighboring spotbeams and channel fading are the main limitations.
Автор: Jacob Benesty; Jingdong Chen; Chao Pan Название: Fundamentals of Differential Beamforming ISBN: 9811010455 ISBN-13(EAN): 9789811010453 Издательство: Springer Рейтинг: Цена: 9141.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This book provides a systematic study of the fundamental theory and methods of beamforming with differential microphone arrays (DMAs), or differential beamforming in short.
Автор: Julien Bourgeois; Wolfgang Minker Название: Time-Domain Beamforming and Blind Source Separation ISBN: 1441943323 ISBN-13(EAN): 9781441943323 Издательство: Springer Рейтинг: Цена: 16977.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This book addresses the problem of separating spontaneous multi-party speech by way of microphone arrays (beamformers) and adaptive signal processing techniques. All experimental results have been obtained with real in-car microphone recordings involving simultaneous speech of the driver and the co-driver.
Автор: Jian Li Название: Robust Adaptive Beamforming ISBN: 0471678503 ISBN-13(EAN): 9780471678502 Издательство: Wiley Рейтинг: Цена: 25653.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Robust Adaptive Beamforming assembles and presents the latest development on robust adaptive beamforming research. Only recently have some methods with a clear theoretical background been proposed, which, unlike the early methods, make explicit use of an uncertainty set of the array steering vector.
Автор: Manikas Athanassios Название: Beamforming: Sensor Signal Processing For Defence Applications ISBN: 1783262745 ISBN-13(EAN): 9781783262748 Издательство: World Scientific Publishing Рейтинг: Цена: 15682.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание:
Beamforming: Sensor Signal Processing for Defence Applications presents a range of important research contributions concerned with sensor array signal processing and, in particular, with the superresolution beamformers fundamental to many civilian and defence applications. Both space and space-time (STAP) beamforming algorithms and their application to radar systems are considered with emphasis given to "look-down" airborne radars, synthetic aperture radar (SAR), arrayed MIMO radar and a number of common wake-wave detection algorithms for two-dimensional SAR imagery. Furthermore, ocean towed arrays, which find applications in a variety of areas such as defence, oil and gas exploration, and geological and marine life studies, are also considered paying particular attention to receiver positional uncertainties resulting from the array's flexible structure. Array geometrical and electrical uncertainties, design of auto-calibration algorithms, beamforming "pointing" error uncertainties and robustification issues are also presented.
This book is self-contained and unified in its presentation, and comprehensively covers some of the classic and fundamental models of beamforming for sensor signal processing. It is suitable as an advanced textbook for graduate students and researchers in the area of signal processing, as well as a reference book for engineers in the defence industry.
Автор: Yikun Yu; Peter G.M. Baltus; Arthur H.M. van Roerm Название: Integrated 60GHz RF Beamforming in CMOS ISBN: 940073493X ISBN-13(EAN): 9789400734937 Издательство: Springer Цена: 15672.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание:
1 Introduction. 1.1 Background. 1.2 State of the Art. 1.3 Outline of the Book.
2 Millimeter-Wave Wireless Communication. 2.1 Millimeter-Wave Communication. 2.2 System Requirements. 2.3 Implementation in Silicon & CMOS. 2.4 Conclusion.
3 Phased Arrays and Architecture Selection. 3.1 A 60GHz WPAN Link Budget. 3.2 Operation Principles of Phased Arrays. 3.3 Benefits of Phased Arrays. 3.4 Phased Arrays and MIMO. 3.5 Phase-Shift Quantization. 3.6 Phased-Array Architectures. 3.7 Conclusion.
5 A 60GHz Passive Phase Shifter. 5.1 Design of a Passive Phase Shifter. 5.2 Measurement Results. 5.3 Conclusion.
6 A 60GHz Active Phase Shifter Integrated with LNA. 6.1 Principle of an Active RF Phase Shifter. 6.2 Design of an Active RF Phase Shifter. 6.3 Design of an LNA and a Combiner. 6.4 Measurement Results. 6.5 Conclusion.
7 A 60GHz Active Phase Shifter Integrated with PA. 7.1 Design of an Active RF Phase Shifter. 7.2 Design of a Power Amplifier. 7.3 Measurement Results. 7.4 Conclusion.
5 A 60GHz Passive Phase Shifter. 5.1 Design of a Passive Phase Shifter. 5.2 Measurement Results. 5.3 Conclusion.
6 A 60GHz Active Phase Shifter Integrated with LNA. 6.1 Principle of an Active RF Phase Shifter. 6.2 Design of an Active RF Phase Shifter. 6.3 Design of an LNA and a Combiner. 6.4 Measurement Results. 6.5 Conclusion.
7 A 60GHz Active Phase Shifter Integrated with PA. 7.1 Design of an Active RF Phase Shifter. 7.2 Design of a Power Amplifier. 7.3 Measurement Results. 7.4 Conclusion.
5 A 60GHz Passive Phase Shifter. 5.1 Design of a Passive Phase Shifter. 5.2 Measurement Results. 5.3 Conclusion.
6 A 60GHz Active Phase Shifter Integrated with LNA. 6.1 Principle of an Active RF Phase Shifter. 6.2 Design of an Active RF Phase Shifter. 6.3 Design of an LNA and a Combiner. 6.4 Measurement Results. 6.5 Conclusion.
7 A 60GHz Active Phase Shifter Integrated with PA. 7.1 Design of an Active RF Phase Shifter. 7.2 Design of a Power Amplifier. 7.3 Measurement Results. 7.4 Conclusion.
Ultrasound medical imaging stands out among the other diagnostic imaging modalities for its patient-friendliness, high temporal resolution, low cost, and absence of ionizing radiation. On the other hand, it may still suffer from limited detail level, low signal-to-noise ratio, and narrow field-of-view. In the last decade, new beamforming and image reconstruction techniques have emerged which aim at improving resolution, contrast, and clutter suppression, especially in difficult-to-image patients. Nevertheless, achieving a higher image quality is of the utmost importance in diagnostic ultrasound medical imaging, and further developments are still indispensable. From this point of view, a crucial role can be played by novel beamforming techniques as well as by non-conventional image formation techniques (e.g., advanced transmission strategies, and compounding, coded, and harmonic imaging). This Special Issue includes novel contributions on both ultrasound beamforming and image formation techniques, particularly addressed at improving B-mode image quality and related diagnostic content. This indeed represents a hot topic in the ultrasound imaging community, and further active research in this field is expected, where many challenges still persist.
Описание: In this book, the authors first present an overview of beamforming antennas and millimeter wave communications followed by a discussion on the challenges and issues facing MAC and multi-hop routing in the wireless networks with beamforming antennas.
Название: Digital Beamforming In Wireless Communications ISBN: 0890067120 ISBN-13(EAN): 9780890067123 Издательство: Artech House Рейтинг: Цена: 15708.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Growth of wireless communications is demanding increased system capacity for mobile communications satellites - digital beamforming technology provides a promising cost-effective solution to this problem. This text includes discussions on beamforming techniques and results.
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