Results 111 to 120 of about 47,501 (159)

Coded cooperation using LDPC codes

2009 Global Mobile Congress, 2009
In this paper, a novel scheme of coded cooperation using LDPC codes is presented. Two decoding methods are proposed. A simple upper bound of this scheme is introduced based on the union bound. The performance of these two methods is evaluated and compared by simulation.
Dongfeng Zhao, Daoben Li
openaire   +1 more source

Network coded noncoherent cooperative communications

2014 22nd Signal Processing and Communications Applications Conference (SIU), 2014
In recent years, network coding has received significant attention as an innovative approach that improves the spectral efficiency of wireless communication systems. The Multiple Access Relay Channel (MARC) where multiple users communicate with a common destination via a relay, is one of the important network coding applications in wireless cooperative
Karabulut, Muhammet Ali, Ilhan, Haci, Ozdemir, Ozgur   +2 more
openaire   +3 more sources

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

Cooperative coding for wireless networks

4th International Workshop on Mobile and Wireless Communications Network, 2003
User-cooperation represents an effective way of introducing diversity in wireless networks. Spatial diversity gains are obtained through the cooperation of mobile users and the use of the partner's antenna. In this paper, we design channel codes that are capable of achieving the full diversity provided by user-cooperation, with the constraint that they
A. Stefanov, E. Erkip
openaire   +1 more source

Cooperative coding scheme using polar codes

Proceedings of 2012 2nd International Conference on Computer Science and Network Technology, 2012
Cooperative coding technique combines the channel coding technique to cooperative communications, and guarantees the high performance. Polar codes, proposed by Arikan in 2007, have been proven to be capacity-achieving codes with low encoding and decoding complexity. In the paper, we propose a cooperative coding scheme using polar codes.
Hui Kong, Chao Xing, Shengmei Zhao, Peng Shi   +3 more
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

Opportunistic Cooperative Multicast Based on Coded Cooperation

IEICE Transactions on Communications, 2011
In this letter, we study cooperative transmission in wireless multicast networks. An opportunistic cooperative multicast scheme based on coded cooperation (OCM-CC) is proposed and its closed-form expression of outage performance is obtained. Through numeric evaluation, we analyze its outage probability with different numbers of relays and different ...
Jiang YU, Youyun XU, Jinlong WANG
openaire   +1 more source

Automatic Detecting Code Cooperation

11th Asia-Pacific Software Engineering Conference, 2005
Software functionalities and behavior are accomplished by the cooperation of code artifacts. The understanding of this type of source code collaboration provides an important aid to the maintenance and evolution of legacy systems. However, the original collaboration design information is dispersed at the implementation level.
null Lei Wu, H. Sahraoui, P. Valtchev
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.
Ozgur Oruc, Umit Aygolu
openaire   +1 more source

Cooperation diversity through coding

Proceedings IEEE International Symposium on Information Theory,, 2003
We propose a new user cooperation scheme for wireless communications in which we combine cooperation with existing channel coding methods. Simulation results show a significant improvement in the BER for both users, even when the channel between them is poor, or when they have significantly different channel qualities to the base station.
T.E. Hunter, A. Nosratinia
openaire   +1 more source