03586nam a2200265 a 4500 vtls000067363 KUKTEM 20251125093606.0 121204t2011 enka f 001 0 eng d 9780123744838 (hbk.) 0123744830 (hbk.) 201306131616 saini 201212040825 ida UMP TK5103.2 .W57 2011 Wireless communications over rapidly time-varying channels / edited by Franz Hlawatsch, Gerald Matz Oxford, UK : Academic Press, 2011 xxviii, 425 p. : ill. ; 25 cm. Includes bibliographical references and index 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 Wireless communication systems Time-series analysis Hlawatsch, F. (Franz) Matz, Gerald 0 0 0 0 20000 20000 2019-09-04 342.94 0 TK5103.2 .W57 2011 0000073483 2019-09-04 00:00:00 1 342.94 2019-09-04 OPEN VIRTUA40 66170 66176 VTLSSORT0080*0200*0201*0400*0900*2450*2600*3000*5040*5050*6500*6501*7000*7001*9992