Results 141 to 150 of about 166,124 (208)

Neural approach to turbo equalization

14th IEEE Proceedings on Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003., 2004
The turbo equalization can improve the receiver performance significantly. The problem is that the complexity of the optimal algorithms increases exponentially with respect to used code and channel taps. We propose a suboptimal turbo equalizer which is based on iterative equalizer for PSK modulated signals and recurrent neural network convolutional ...
Ari Hämäläinen, Jukka Henriksson
openaire   +1 more source

Direct-Adaptive Turbo Equalization Based on Interference Reconstruction for OTFS Underwater Acoustic Communication System

IEEE Journal of Oceanic Engineering
Orthogonal time frequency space (OTFS) modulation has recently gained recognition as a promising modulation scheme for high-mobility communication systems.
Lianyou Jing, Zhekai Xue, Chengbing He, Tonghui Zheng, Xingyu Cao   +4 more
semanticscholar   +1 more source

Delay-Doppler Domain Turbo Equalization for Single-Carrier Underwater Acoustic Communications

IEEE Journal of Oceanic Engineering
Single carrier modulation, a commonly used method in high-speed underwater acoustic communications, requires equalization at the receiver. However, its performance remains suboptimal in rapidly time-varying channels.
Tonghui Zheng, Chengbing He, Lianyou Jing, Qiankun Yan   +3 more
semanticscholar   +1 more source

Turbo-equalization: convergence analysis

2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221), 2002
We investigate a sub-optimal iterative receiver for joint equalization and decoding called a turbo-equalizer. We view the evolution of the error variance of the transmitted symbols through iterative processing, obtaining the convergence analysis. This allows us to predict the asymptotic performance (when the turbo-equalizer has converged) but also the ...
Aline Roumy, Alex J. Grant, Inbar Fijalkow, Paul D. Alexander, Didier Pirez   +4 more
openaire   +1 more source

Turbo Equalization for High-Speed PAM4 Bandwidth-Limited IM/DD Transmission System

European Conference on Optical Communication
Through simulations and experiments, we demonstrate that turbo equalization, combining the BCJR detector with a 2D-SPC decoder, achieves significant gain at the pre-FEC KP4 BER threshold compared to the standardized $(128,120)$ extended Hamming code in ...
Tianyuan Kong, N. Stojanović, T. Wettlin, S. Calabrò, Balázs Matuz, E. B. Yacoub, M. Kuschnerov, S. Pachnicke   +7 more
semanticscholar   +1 more source

Turbo Equalizer

2006
Turbo codes exhibit excellent performance gains. Turbo equalization is an iterative equalization and decoding technique. It can achieve equally impressive performance gains for communication systems. Turbo codes are send digital data over channels that require equalization, i.e. those which suffer from inter-symbol interference (ISI).
null Priyatamkumar, R. M. Banakar, B. Shankaranand   +2 more
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

Time domain turbo equalization based on vector approximate message passing for multiple-input multiple-output underwater acoustic communications.

Journal of the Acoustical Society of America
This paper proposes a high-performance receiver for underwater acoustic communications based on time reversal processing for multiple-input multiple-output (MIMO) systems.
Weizhe Li, Xiao Han, Guangjun Zhu, Jingwei Yin   +3 more
semanticscholar   +1 more source

Adaptive Turbo Equalization for Differential OFDM Systems in Underwater Acoustic Communications

IEEE Transactions on Vehicular Technology, 2020
In this correspondence paper, an adaptive turbo equalizer for differential OFDM systems in underwater acoustic communications is proposed. This scheme first reconstructs the demodulation symbols using the soft information fed back from the channel ...
Shiduo Zhao, Shefeng Yan, Junyi Xi
semanticscholar   +1 more source