Results 201 to 210 of about 6,730 (257)

Turbo equalizations for sparse channels

2004 IEEE Wireless Communications and Networking Conference (IEEE Cat. No.04TH8733), 2004
Turbo equalization scheme provides nearly optimal performance but when it is employed in sparse multipath channel environments, the equalizer complexity can prohibit its use and develops a parallel trellis n-tap maximum a posteriori (MAP) equalizer, which can consider n dominant taps of sparse channels in the trellis with reasonable complexity.
Jeongsoon Park, Saul B. Gelfand
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Turbo equalization with an unknown channel

IEEE International Conference on Acoustics Speech and Signal Processing, 2002
We consider the problem of joint equalization and decoding, using the method of turbo equalization originally developed by Douillard, et al. [3]. In its original form, turbo-equalization requires accurate knowledge of the channel at the receiver.
Seongwook Song, Andrew C. Singer, Koeng-Mo Sung   +2 more
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Noncoherent channel equalization for DDPSK

IEEE Transactions on Wireless Communications, 2007
This paper introduces a novel noncoherent linear channel equalization structure for time dispersive channels subjected to non negligible carrier frequency offsets for double differential phase shift keying (DDPSK) modulation. An optimization criterion for the adjustment of the coefficients of this equalization structure, termed cross-differential ...
Aldo G. Orozco-Lugo, Giselle M. Galván-Tejada, M. Mauricio Lara, Valeri Ya. Kontorovitch   +3 more
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Blind equalizers for multipath channels with best equalization delay

1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258), 1999
Previous studies show that equalizers with different equalization delays achieve different performances. The best performed equalizer is not necessarily the one with 0-delay, and often not the case when the channel is non-minimum-phase. In this paper, a blind channel equalization algorithm is presented, by which equalizers with all possible ...
Hui Luo, Ruey-Wen Liu
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A new approach to channel equalization problem

2015 23nd Signal Processing and Communications Applications Conference (SIU), 2015
In this study, a new approach based on Lyapunov stability theory (LST) is proposed for channel equalization problem. For the first time, the convergence capability of the proposed algorithm is presented on the channel equalization problem. The proposed approach is compared with normalized least mean square (NLMS) algorithm. Simulation results show that
Engin Cemal Menguc, Nurettin Acir
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Nonlinear Equalization of Digital Satellite Channels

IEEE Journal on Selected Areas in Communications, 1982
Conventional techniques attempting to compensate for the influence of linear and nonlinear distortion in digital satellite channels include optimization of channel filtering. With conventional linear filtering it has been experienced that there is still room for considerable improvement, so that it appears reasonable to investigate some forms of ...
Sergio Benedetto, Ezio Biglieri
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Channel equalization for the GSM system

International Journal of Wireless Information Networks, 1996
This article presents the generic structure and the formulation for maximum likelihood detection of signals corrupted by intersymbol interference. Then, simplifications are made for the application of the technique in the mobile communication environment using the GSM specifications for which a channel memory length of four is used for equalizing over ...
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Automatic wavelength channel-by-channel equalizer

Optical Fiber Communication Conference. Technical Digest Postconference Edition. Trends in Optics and Photonics Vol.37 (IEEE Cat. No. 00CH37079), 2002
We demonstrate a wavelength equalizer that can automatically control individual channel powers in a 40 channel system, yet gives no distortion to channels that already have the same power as their neighbors. It has
C.R. Doerr, L.W. Stulz, R. Pafchek, L. Gomez, M. Cappuzzo, A. Paunescu, E. Laskowski, L. Buhl, H.K. Kim, S. Chandrasekhar   +9 more
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Semiblind Bussgang Equalization for Sparse Channels

IEEE Transactions on Signal Processing, 2009
In this correspondence, we describe a semiblind Bussgang equalization scheme that incorporates the training sequence in a quite direct and flexible fashion. Among others, we discuss how the training sequence can be used to control the Bussgang nonlinearity thus enforcing the convergence of the iterative equalizer design.
COLONNESE, Stefania, Gianpiero Panci, RINAURO, STEFANO, SCARANO, Gaetano   +3 more
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Channel equalization for block transmission systems

IEEE Journal on Selected Areas in Communications, 1995
In a block transmission system the information symbols are arranged in the form of blocks separated by known symbols. Such a system is suitable for communication over time-dispersive channels subject to fast time-variations, e,g., the HF channel. The known reliable receiver for this system is the nonlinear data-directed estimator (NDDE).
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