Results 141 to 150 of about 574 (170)
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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
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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
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An application of turbo trellis-coded modulation to tactical communications
MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341), 2003We 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
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Constellation Shaping using Turbo Trellis-Coded Modulation
2012 6th International Conference on Sciences of Electronics, Technologies of Information and Telecommunications (SETIT), 2012This 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 +2 more
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On filter-based turbo equalization with serially concatenated trellis coded modulation
IEEE International Conference on Communications, 2005. ICC 2005. 2005, 2005A 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
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Adaptive Turbo Trellis Coded Modulation aided cooperative Cognitive Radio
2012 IEEE Wireless Communications and Networking Conference (WCNC), 2012An adaptive Turbo Trellis Coded Modulation (ATTCM) aided Cognitive Radio (CR) scheme is proposed for cooperative communication among Primary Users (PUs) and Cognitive Users (CUs). The new cooperative protocol allows a CU to serve as a Relay Node (RN) for relaying the signal of the first PU, which is a Source Node (SN) to the second PU, which is a ...
Wei Liang 0002, Soon Xin Ng, Lajos Hanzo
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Design of space-time turbo trellis coded modulation for fading channels
GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270), 2002This 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 +3 more
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IQ-interleaved turbo trellis-coded differential chaotic modulation scheme
2017 23rd Asia-Pacific Conference on Communications (APCC), 2017The 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 +3 more
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Distributed video coding of Wyner-Ziv frames using Turbo Trellis Coded Modulation
2006 International Conference on Image Processing, 2006In this paper, we present a novel distributed video coding algorithm based on turbo trellis coded modulation (TTCM). As in the conventional turbo based Slepian-Wolf encoder, quantised information is applied to the TTCM encoder and parity bits are generated from both constituent encoders. However, TTCM symbols are not generated at the encoder since they
W. A. Rajitha Jayaruwan Weerakkody +3 more
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Turbo-trellis coded modulation under channel estimation inaccuracies
2010 18th Iranian Conference on Electrical Engineering, 2010Turbo-trellis coded modulation (TTCM) schemes are designed for reliable transmission over quasi-static fading channels. Assuming pilot-assisted channel estimation, practical limitations in power and the number of pilots lead to imperfect channel estimates. A general method for robust receiver design under channel estimation errors was recently proposed
Mohammad Modarresi +1 more
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High-Performance Space-Time Turbo Trellis Code Modulation
2005 IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2006We propose a high-performance space-time turbo trellis code modulation (ST-TTCM), the key idea is the expansion of orthogonal space-time signal set and the classical set partitioning. There have been high rate space-time trellis codes constructed by concatenating the space-time block code (STBC) and multiple trellis code modulation (MTCM) with the ...
null Wenmiao Song +2 more
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