Results 171 to 180 of about 5,976 (210)

Trellis Coding with Asymmetric Modulations

IEEE Transactions on Communications, 1987
Traditionally symmetric signal constellations, i.e., those with uniformly spaced signal points, have been used for both uncoded and coded systems. Although symmetric signal constellations are optimum with no coding, the same is not necessarily true for coded systems. This paper shows that by designing the signal constellations to be asymmetric, one can,
Dariush Divsalar, Marvin K. Simon, Joseph H. Yuen   +2 more
openaire   +1 more source

Cooperative Multiple Trellis Coded Modulation

MILCOM 2006, 2006
In this paper, we consider the design of cooperative multiple trellis coded modulation (CMTCM) schemes over Rayleigh fading channels. We design cooperative multiple trellis codes using asymmetric constellations that provide significant gains over non-cooperative coded modulation without sacrificing the data rate and bandwidth consumption.
Jialing Li, Andrej Stefanov
openaire   +1 more source

Trellis Code Design for Spatial Modulation

2011 IEEE International Conference on Communications (ICC), 2011
In this paper, we propose a novel MIMO transmission scheme, called trellis coded spatial modulation (TC-SM) in which the trellis (convolutional) encoder and the spatial modulation (SM) mapper are jointly designed similar to the conventional trellis coded modulation (TCM).
Basar, Ertugrul, Panayırcı, Erdal, Aygolu, Umit, Panayirci, Erdal   +3 more
openaire   +3 more sources

A Pragmatic Approach to Trellis-Coded Modulation

IEEE Communications Magazine, 1989
Since the early 1970s, for power-limited applications, the convolutional code constraint length K=7 and rate 1/2, optimum in the sense of maximum free distance and minimum number of bit errors caused by remerging paths at the free distance, has become the de facto standard for coded digital communication.
Andrew J. Viterbi, Jack K. Wolf, Ephraim Zehavi, Roberto Padovani   +3 more
openaire   +1 more source

A trellis-coded chaotic modulation scheme

2006 IEEE International Conference on Communications, 2006
Recently, a chaotic modulation has been proposed and attracts many researchers' attention because of some properties such as noise-like signal, nonlinearity, and pseudo-periodicity. The chaotic modulation is usually treated as a secure transmission scheme rather than an efficient scheme in terms of channel noise.
Eiji Okamoto, Yasunori Iwanami
openaire   +1 more source

Trellis coded modulation for informed receivers

2017 IEEE International Conference on Communications Workshops (ICC Workshops), 2017
We consider the following variant of the index coding problem. A transmitter wishes to communicate several messages, each of which is k bit long, to multiple informed receivers over a noisy broadcast link. Each informed receiver already knows some of the messages a priori, which is called its side information, and demands to know the rest of the ...
Xuepeng Xiao, Yi Hong 0001, Emanuele Viterbo, Anindya Gupta   +3 more
openaire   +1 more source

Trellis-Coded Modulation

1999
As it is discussed in Chapter 1, power and bandwidth are limited resources in modern communication systems, and the efficient exploitation of these resources invariably involves an increase in complexity. It has become apparent over the past few decades that when there are strict limits on the power and bandwidth resources, the complexity of ...
Irving S. Reed, Xuemin Chen
openaire   +1 more source

Trellis Coded Generalized Spatial Modulation

2014 IEEE 79th Vehicular Technology Conference (VTC Spring), 2014
In this paper, a novel trellis coded generalized spatial modulation (TCGSM) scheme is presented and analyzed. Similar to that of the traditional generalized spatial modulation (GSM), a subset of the entire transmit antennas is selected for transmission at each time slot.
You Zhou 0006, Dongfeng Yuan, Xiaotian Zhou, Haixia Zhang 0001   +3 more
openaire   +1 more source

Trellis-Coded Unitary Space-Time Modulation

IEEE Transactions on Wireless Communications, 2002
Space-time coding is well established for high data rate communications in wireless channels with perfect channel state information. On the other hand, the case where channel state information is unknown has received limited attention. Recently, a new signaling scheme called unitary space-time modulation has been proposed for the latter case.
Israfil Bahceci, Tolga M. Duman
openaire   +1 more source

Trellis coding for spatial modulation

2011 IEEE 19th Signal Processing and Communications Applications Conference (SIU), 2011
In this study, by combining trellis coding with spatial modulation (SM), a new multiple-input multiple output (MIMO) communication scheme called trellis coded spatial modulation (TC-SM) is proposed. For uncorrelated Rayleigh fading channels, code design criteria are given by deriving pairwise error probability (PEP) of this system, in which a trellis ...
Ertugrul Basar, Umit Aygolu, Erdal Panayirci, H. Vincent Poor   +3 more
openaire   +1 more source