Results 251 to 260 of about 337,244 (282)

Source and Channel Coding for Cooperative Relaying

IEEE Transactions on Information Theory, 2005
We consider the end-to-end distortion achieved by a half-duplex relay system where a continuous amplitude source is transmitted over a quasi-static Rayleigh fading channel. We investigate layered source coding (LS) where different source layers are sent at different times.
Deniz Gündüz, Elza Erkip
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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

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
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Cooperation and Coding Framework

2009 IEEE International Conference on Communications Workshops, 2009
Exploiting cooperation and coding techniques is a vivid area in current networking research. Unfortunately, implementing and deploying such techniques is often difficult due to their complexity and the required modifications deeply within the protocol stack.
T. Biermann, Z. A. Polgar, H. Karl
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
Muhammet Ali Karabulut, Haci Ilhan, Özgür Özdemir   +2 more
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Human Cooperation and the Complexity of Moral Codes

The 2018 Conference on Artificial Life, 2018
This work was supported by FCT Portugal (Grants: SFRH/BD/94736/2013, PTDC/EEI-SII/5081/2014, PTDC/MAT/STA/3358/2014, UID/BIA/04050/2013 and UID/CEC/50021/2013).
Fernando P. Santos, Jorge M. Pacheco, Francisco C. Santos   +2 more
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Superposition Coded Modulation for Cooperative Communications

2012 IEEE Vehicular Technology Conference (VTC Fall), 2012
A Turbo Trellis-Coded Modulation (TTCM) aided superposition modulation scheme is conceived for a Decode-and-Forward (DAF) based cooperative communication system. More specifically, two source nodes communicate simultaneously with the same destination node via a relay node.
Hua Sun, Soon Xin Ng, Lajos Hanzo
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Fountain codes based partial cooperation in cooperative communications

Proceedings of the 6th International Wireless Communications and Mobile Computing Conference, 2010
To improve the throughput performance without feedback channel, a partial cooperation scheme based on fountain codes is proposed in this paper. Compared with the incremental relaying where the signal is retransmitted in fixed or selective relay and fed back to the source from the destination, the proposed scheme only requires the partner to offer ...
Jing (Jonas) Yang, Jianping An, Xiangming Li, Lei Yuan 0002, Nan (Jonas) Yang   +4 more
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Cooperative spectrum sensing with Slepian-Wolf coded cooperations

2012 IEEE International Conference on Communications (ICC), 2012
A new Slepian-Wolf coded cooperation scheme is proposed for a cognitive radio network with two secondary users (SUs) performing cooperative spectrum sensing through a fusion center (FC). The SUs sense the spectrum by measuring the energy statistics of the received signals.
Ning Sun 0006, Guoqing Zhou 0006, Jingxian Wu 0001   +2 more
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Cooperative coding using serial concatenated convolutional codes

IEEE Wireless Communications and Networking Conference, 2005, 2005
The paper presents a novel cooperative coding scheme using punctured serial concatenated convolutional codes (SCCC). We evaluate its performance in terms of frame error rate (FER) under two cooperation protocols: a decode-and-forward protocol in conjunction with automatic repeat request (ARQ), by which the relay sends an acknowledge bit (ACK) back to ...
Yang Cao, Branimir R. Vojcic
openaire   +1 more source