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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| Main Author | |
|---|---|
| Other Authors | |
| Format | Electronic eBook |
| Language | English |
| Published |
[S.l.]
Elsevier professional
2011
|
| Edition | 1. Aufl. |
| Subjects | |
| Online Access | Full text |
| ISBN | 9780123744838 |
| Physical Description | 1 online zdroj (1500 KB, 456 S.) |
Cover
Table of Contents:
- 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.
- 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.