Interference Suppression Techniques for Multi-rate CDMA Communication Systems PDF Download

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Languages : en
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Author: Tao Luo
Publisher:
ISBN:
Category :
Languages : en
Pages :

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This thesis is concerned with interference suppression in multi-rate Code-division multiple-access (CDMA) communication systems. Specifically, the following problems within the area of CDMA communication systems have been addressed: interference suppression through chip waveform design, interference reduction through new diversity techniques for users having low mobility by exploiting inherent channel diversity and joint spatial-temporal interference suppression; all with the ultimate goal to increase the system capacity. First, we examine interference issues in the multi-rate CDMA communication systems. We minimize the interference by designing different chip waveforms for different data rate users. A general chip waveform design framework is formulated. It is shown that it is better to separate different data rate users in spectrum if their quality of service requirements are quite different. Next, we propose a new receiver structure targeting those users having low mobility but whose channels have small dispersion in frequency. We show that even a very small delay spread can be exploited to achieve significant gain in terms of the signal-to-noise ratio. Then we consider joint spatial and temporal interference suppression through an adaptive antenna array. We show that adaptive spatial and temporal correlation control between different users can give us higher system capacity. Sub-optimal algorithms with low complexity are proposed and analyzed. We show that the proposed algorithms reduce the transmit power significantly, therefore, greatly increase the system capacity. Finally, we examine the role of the adaptive antenna array in the multi-rate CDMA communication systems. We show that if we perform beamforming for different data rate users, most of the achieved gain is due to the high data rate users if the total power of the high data rate users is much higher than that of the low rate users. Thus, significant computational savings can be achieved but with near optimum transmit power.

Author: Tao Luo
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN: 9780612589582
Category :
Languages : en
Pages : 250

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Author: Hongxia Zhao
Publisher:
ISBN: 9789173851220
Category :
Languages : en
Pages : 51

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Author: Weiping Xu
Publisher:
ISBN:
Category :
Languages : en
Pages : 254

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Author: Daryl S. Reynolds
Publisher:
ISBN:
Category :
Languages : en
Pages : 394

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Author: Luca Fanucci
Publisher: Springer Science & Business Media
ISBN: 1402025378
Category : Technology & Engineering
Languages : en
Pages : 284

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An Experimental Approach to CDMA and Interference Mitigation was written with the admittedly ambitious intent of filling the gap between communication theory and VLSI implementation, and thus to provide a more general/theoretical approach to the design, development, and testing of a CDMA receiver. As a consequence, the concepts and techniques that are presented turn out to be applicable to a more general kind of digital wireless modems in terms of receiver architecture design and implementation. As the reader will easily find out, the subject of digital modem design and implementation is addressed in the book starting from a theoretical approach (supported by proper bibliographic references), and is followed by application issues, with reference to an ESA experiment assumed as a case study. A complete design flow, from specification to implementation, including testing and final verification is then presented. This leads the reader step-by-step to a thorough understanding of CDMA transmission and detection, and constitutes a practical guidance for the design of VLSI wireless mobile terminals.

Author: Wan Shi Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 114

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Author: Francis Swarts
Publisher: Springer Science & Business Media
ISBN: 146155103X
Category : Technology & Engineering
Languages : en
Pages : 324

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Book Description
CDMA Techniques for Third Generation Mobile Systems presents advanced techniques for analyzing and developing third generation mobile telecommunication systems. Coverage includes analysis of CDMA-based systems, multi-user receivers, Turbo coding for mobile radio applications, spatial and temporal processing techniques as well as software radio techniques. Special emphasis has been given to recent advances in coding techniques, smart antenna systems, spatial filtering, and software implementation issues. Internationally recognized specialists contributed to this volume, and each chapter has been reviewed and edited for uniformity. CDMA Techniques for Third Generation Mobile Systems is an invaluable reference work for engineers and researchers involved in the development of specific CDMA systems.

Author: Peter Stavroulakis
Publisher: Artech House
ISBN: 9781580535748
Category : Computers
Languages : en
Pages : 442

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Book Description
This leading-edge resource offers you a new methodology for analyzing and studying the behavior of wireless communication systems in an interference environment. It provides you with modern tools and techniques for use in real-world applications that help you guarantee optimum system performance. The book treats both additive and multiplicative interfering signals, including in-depth descriptions of how these signals behave, regardless of the source.