Results 131 to 140 of about 2,576 (163)

Turbo-equalization applied to trellis-coded-modulations

Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324), 2003
In this article, a turbo-equalizer for TCM is investigated. The receiver is composed of a symbol detector or an equalizer realizing soft-output equalization, a deinterleaver, a soft-input soft-output channel decoder based on the a posteriori probability (APP) algorithm.
P. Magniez, P. Duhamel, A. Roumy, I. Fijalkow   +3 more
openaire   +1 more source

Turbo-coded pragmatic trellis coded modulation using coset mapping

14th IEEE Proceedings on Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003., 2004
This paper presents the application of turbo coding technique combined with bandwidth efficient method known as trellis coded modulation (TCM). A transformation apply to the incoming I-channel and Q-channel symbols allows to use off-the-self B/QPSK turbo decoder without any modifications.
Ji-Won Jung, Eun A. Choi, Nae-Soo Kim
openaire   +1 more source

Optimal design of trellis coded quantization based on reliability information of turbo trellis coded modulation

2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333), 2003
Turbo trellis-coded modulation (TCM) with code matched interleaver (CMI) is applied to develop a trellis coded quantization (TCQ). It can been shown that TCQ of memoryless Gaussian sources results in substantial improvement of performance with iterative decoding of turbo TCM and iterative optimization of minimum overall distortion between the source ...
Yao-Jun Wu, Haruo Ogiwara
openaire   +1 more source

Turbo trellis-coded modulation with time varying mixed mapping

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211), 2002
We describe a technique to control the trade-off between the error floor and the waterfall performance of parallel concatenated trellis-coded. modulation (PCTCM), which is also known as turbo TCM, via the choice of coded-bits-to-signal mapping for a fixed component code. We demonstrate that different choice of mapping leads to different error floor and
Eko N. Onggosanusi, Alan Gatherer, Anand G. Dabak   +2 more
openaire   +1 more source

Equalization combined with trellis coded and turbo trellis coded modulation in the nonlinear satellite channel

MILCOM 2000 Proceedings. 21st Century Military Communications. Architectures and Technologies for Information Superiority (Cat. No.00CH37155), 2002
We study advanced receiver based techniques to alleviate the effects of nonlinear distortion in the bandlimited coded nonlinear satellite channel. First we develop a novel reduced complexity maximum likelihood sequence estimator for a Volterra channel model, which can be used for combined equalization and decoding in trellis coded systems. We show that
S.W. Heo, S.B. Gelfand, J.V. Krogmeier
openaire   +1 more source

An application of turbo trellis-coded modulation to tactical communications

MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341), 2003
We present a frequency-hop packet radio system that is compatible with existing SINCGARS radio equipment and provides three times the spectral efficiency of SINCGARS. The system employs parallel concatenated trellis coded modulation, or turbo trellis-coded modulation, a recently proposed modulation scheme that combines the error control capability of ...
J.H. Gass, P.J. Curry, C.J. Langford
openaire   +1 more source

Constellation Shaping using Turbo Trellis-Coded Modulation

2012 6th International Conference on Sciences of Electronics, Technologies of Information and Telecommunications (SETIT), 2012
This work presents the simulation results of the performances of Turbo Trellis-Coded Modulation (TTCM) using Constellation Shaping (CS). The proposed method consists on increasing the constellation order and selecting only the most significant constellation points in order to increase the Euclidean free distance (d f ) of the entire encoding scheme ...
Abdesselam Bassou, Ali Djebbari, Mohamed Benaissa   +2 more
openaire   +1 more source

On filter-based turbo equalization with serially concatenated trellis coded modulation

IEEE International Conference on Communications, 2005. ICC 2005. 2005, 2005
A recursive trellis coded modulation (TCM) precoder is combined with a linear minimum mean squared error (LMMSE) turbo equalizer. The system is optimized by using inner and outer codes with maximum slope of the active burst distance, and also by maximizing the minimum distance between inner and outer code extrinsic transfer functions.
Asgeir Nysaeter, Roald Otnes
openaire   +1 more source

Design of space-time turbo trellis coded modulation for fading channels

GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270), 2002
This paper presents the design of space-time turbo trellis coded modulation (ST turbo TCM). We introduce new recursive space-time trellis coded modulation (STTC) which outperform feedforward STTC proposed by Tarokh, Seshadri and Calderbank (see Trans. Inform. Theory, vol.44, no.2, p.744-65, 1998) and by Baro, Bauch and Hansmann (see IEEE Trans. Commun.
Welly Firmanto, Zhuo Chen 0001, Branka Vucetic, Jinhong Yuan   +3 more
openaire   +1 more source

IQ-interleaved turbo trellis-coded differential chaotic modulation scheme

2017 23rd Asia-Pacific Conference on Communications (APCC), 2017
The turbo trellis-coded differential chaotic modulation (TTC-DCM) is a newly proposed scheme, which is very suitable for bandlimited communication applications with poor channel conditions due to the merits of high bandwidth efficiency, robustness to multipath fading and easy-to-implement property.
Chenglong Zhou, Wei Hu 0009, Lin Wang 0003, Weikai Xu   +3 more
openaire   +1 more source