Wireless Communications Over Rapidly Time-Varying Channels

As a result of higher frequencies and increased user mobility, researchers and systems designers are shifting their focus from time-invariant models to channels that vary within a block. This book explains the latest theoretical advances and practical methods to give an understanding of rapidly time...

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Bibliographic Details
Main Author Hlawatsch, Franz
Other Authors Matz, Gerald
Format Electronic eBook
LanguageEnglish
Published [S.l.] Elsevier professional 2011
Edition1. Aufl.
Subjects
Time-series analysis.
Wireless communication systems.
elektronické knihy
electronic books
Online AccessFull text
ISBN9780123744838
Physical Description1 online zdroj (1500 KB, 456 S.)

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245 1 0 |a Wireless Communications Over Rapidly Time-Varying Channels  |h [elektronický zdroj]. 
250 |a 1. Aufl. 
260 3 |a [S.l.]  |b Elsevier professional  |c 2011 
300 |a 1 online zdroj (1500 KB, 456 S.) 
504 |a Includes bibliographical references and index 
505 0 |a Fundamentals of Time-Varying Communication Channels -- Information Theory of Underspread WSSUS Channels -- Algebraic Coding for Fast Fading Channels -- Estimation of Time-Varying Channels : A Block Approach -- Pilot Design and Optimization for Transmission over Time-Varying Channels -- Equalization of Time-Varying Channels -- OFDM Communications over Time-Varying Channels -- Multi-User MIMO Receiver Processing for Time-Varying Channels -- Time-Scale and Dispersive Processing for Wideband Time-Varying Channels. 
505 0 |a Fundamentals of time-varying communication channels. Introduction ; The physics of time-varying channels ; Deterministic description ; Stochastic description ; Underspread channels ; Parsimonious channel models ; Measurement ; Conclusion -- Information theory of underspread WSSUS channels. The role of a system model ; A discretized system model ; The large-bandwidth regime : diagonalized I/O relation ; The large bandwidth regime : I/O relation with interference ; The high-SNR regime ; Conclusions -- Algebraic coding for fast fading channels. Introduction ; Product distance based code design ; Lattices ; Algebraic number theory ; Algebraic lattices ; Ideal lattices ; Algebraic rotations with high product distance ; Sphere decoding ; Performance of rotated constellations ; Conclusions ---Estimation of time-varying channels : a block approach. Introduction ; System and channel model ; Channel estimation based on a single block ; Channel estimation based on multiple blocks ; Extension to MIMO systems ; Adaptive channel estimation ; Conclusions -- Pilot design and optimization for transmission over time-varying channels. Introduction ; Pilot design : a framework ; Optimal TDM pilot insertion pattern in single carrier systems ; Alternative pilot insertion strategy : superimposed training ; Resource allocation : amount of training and power optimization ; Pilot design for MIMO channels ; Pilot design for wideband systems ; Conclusion ; The Kalman Filter for TDM training ; Proof of proposition 5.1 ; Proof of Lemma 5.1 ; Proof of theorem 5.1 ---Equalization of time-varying channels. Introduction ; System model ; Coherent equalization ; Noncoherent equalization ; Conclusion ; Derivation of posterior LLR expression (6.36) ; Derivation of the noncoherent MLSD expression (6.73) ; Explanation of EM recursion (6.91) ; Info EM(B) algorithms for noncoherent equalization -- OFDM communications over time-varying channels. OFDM systems ; ICI mitigation techniques ; Time-varying channel estimation ; Concluding remarks -- Multiuser MIMO receiver processing for time-varying channels. Introduction ; Multiuser MIMO systems ; Tools for complexity reduction ; Iterative multiuser MIMO time-varying channel estimation ; Linear joint antenna multiuser detection ; Nonlinear detection ; Simulation results ; Conclusions ; Computation of the log-likelihood ratio (8.44) ---Time-scale and dispersive processing for wideband time-varying channels. Introduction ; Narrowband channel characterization ; Wideband delay-scale channel characterization ; Wideband dispersive channel characterization ; Underwater wireless communication channels ; Application example. 
520 |a As a result of higher frequencies and increased user mobility, researchers and systems designers are shifting their focus from time-invariant models to channels that vary within a block. This book explains the latest theoretical advances and practical methods to give an understanding of rapidly time varying channels, together with performance trade-offs and potential performance gains, providing the expertise to develop future wireless systems technology. As well as an overview of the issues of developing wireless systems using time-varying channels, the book gives extensive coverage to methods for estimating and equalizing rapidly time-varying channels, including a discussion of training data optimization, as well as providing models and transceiver methods for time-varying ultra-wideband channels. *An introduction to time-varying channel models gives in a nutshell the important issues of developing wireless systems technology using time-varying channels *Extensive coverage of methods for estimating and equalizing rapidly time-varying channels, including a discussion of training data optimization, enables development of high performance wireless systems *Chapters on transceiver design for OFDM and receiver algorithms for MIMO communication channels over time-varying channels, with an emphasis on modern iterative turbo-style architectures, demonstrates how these important technologies can optimize future wireless systems 
590 |a Knovel Library  |b ACADEMIC - Computer Hardware Engineering 
506 |a Plný text je dostupný pouze z IP adres počítačů Univerzity Tomáše Bati ve Zlíně nebo vzdáleným přístupem pro zaměstnance a studenty univerzity 
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