Results 241 to 250 of about 337,244 (282)

Coded Cooperation in OFDMA Systems

2006 40th Annual Conference on Information Sciences and Systems, 2006
A novel time-frequency cooperative communication strategy is proposed for coded OFDMA system over quasi-static frequency-selective Rayleigh fading. To take advantage of the frequency dispersion, each user transmits his partner's and his own data on different subcarriers spreading over the entire available bandwidth.
Jun Niu, I-Tai Lu
openaire   +1 more source

LDPC-based coded cooperative jamming codes

2012 IEEE Information Theory Workshop, 2012
We present a practical coded cooperative jamming scheme for the problem of secure communications over the two-way wiretap channel. We design low-density parity-check (LDPC) based codes whose codewords interfere at the eavesdropper's terminal, thus providing secrecy.
Alexandre J. Pierrot, Matthieu R. Bloch
openaire   +1 more source

Coordinate Interleaved Coded Cooperation

2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007
In this paper, a two-user cooperative diversity scheme is proposed where coded cooperation and modulation diversity techniques are properly combined to take their full advantage. Users perform selective cooperation in transmission according to the correct estimation of symbols from their partners.
Özgür Oruç, Ümit Aygölü
openaire   +1 more source

Iconic framework for cooperative coding

Proceedings of the 19th International Conference on Computer Systems and Technologies, 2018
The description of an innovative framework built on top of Web-based visual programming environment is the primary aim of this contribution. In the last decade, many frameworks oriented to visual languages have been introduced in literature to improve the skill on programming languages, but at the best of our knowledge, no framework has been specially ...
Guido Averna, Biagio Lenzitti, Davide Taibi 0002, Domenico Tegolo   +3 more
openaire   +1 more source

Bit-cooperative coded modulation

2013 IEEE Wireless Communications and Networking Conference (WCNC), 2013
A new coded modulation technique, termed bit-cooperative coded modulation (BCCM), is proposed in this paper. By introducing a pseudo-random sequence at the transmitter to systematic low-density parity-check (LDPC) codes, the receiver enjoys the benefits of increased minimum Euclidean distance and the Hamming distance when applying this side-information
Zhiyong Chen 0002, Bin Xia 0001, Hui Liu 0011   +2 more
openaire   +1 more source

Coded cooperation for BICM-OFDM

2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC), 2012
Coded cooperation is an attractive user cooperation scheme for wireless systems, where different parts of a coded packet are transmitted over different channels. In this paper, we propose a new approach to improve the performance of coded cooperation.
Toufiqul Islam, Robert Schober, Ranjan K. Mallik   +2 more
openaire   +1 more source

Molecular Code for Cooperativity in Hemoglobin

Science, 1992
Although tetrameric hemoglobin has been studied extensively as a prototype for understanding mechanisms of allosteric regulation, the functional and structural properties of its eight intermediate ligation forms have remained elusive. Recent experiments on the energetics of cooperativity of these intermediates, along with assignments of their ...
G K, Ackers, M L, Doyle, D, Myers, M A, Daugherty   +3 more
openaire   +2 more sources

Code Combining in Cooperative Communication

IEICE Transactions on Communications, 2008
It is well known that cooperative transmission among the single antenna wireless nodes and a proper combining at destination can obtain spatial diversity. In this paper, we introduce a new form of combining technique in cooperative communication.
Asaduzzaman, Hyung Yun Kong
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Cooperative Coding for OFDM Systems

Wireless Personal Communications, 2007
In this paper, we study Orthogonal Frequency Division Multiplexing (OFDM) systems with cooperative coding over frequency selective Rayleigh fading channels. We derive the pairwise error probability (PEP) for the block-fading OFDM channel model. We use the derived PEP to get an upper bound on the frame error probability for the coded cooperative OFDM ...
Jerry C. H. Lin, Andrej Stefanov
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Cooperative regions and partner choice in coded Cooperative systems

IEEE Transactions on Communications, 2006
User cooperation is an efficient approach to obtain diversity in both centralized and distributed wireless networks. In this paper, we consider a coded cooperative system under quasi-static Rayleigh fading and investigate the partner-choice problem.
Zinan Lin 0003, Elza Erkip, Andrej Stefanov   +2 more
openaire   +1 more source