Results 271 to 280 of about 2,606,146 (326)

Relay selection with channel allocation for cognitive radio relay channels in CRN

2014 Eleventh International Conference on Wireless and Optical Communications Networks (WOCN), 2014
This paper investigates cognitive radio network (CRN) performance through cooperative multiple cognitive radio relays and relay selection with channel allocation scheme. In one approach the overall end-to-end throughput (OEET) improves as the number of cognitive radio relays (CRRs) increases in CRN.
Sadhana Mishra, Aditya Trivedi
openaire   +1 more source

Gaussian two-hop relay channel with linear relaying

2011 International Conference on Wireless Communications and Signal Processing (WCSP), 2011
In this paper, the optimization problem of the two-hop relay channel with linear relaying is discussed. The expression of the capacity for the Gaussian two-hop relay channel with linear relaying is shown, which is an optimization problem over the relaying function and the covariance matrix of the signals transmitted by the source node. We show that the
Zhixiang Deng, Bao-Yun Wang, Fei Lang, Yayan Ma   +3 more
openaire   +1 more source

Parallel relay broadcast channels

2010 IEEE International Symposium on Information Theory, 2010
In this paper, we study the achievable rate regions of parallel relay broadcast channels. We present two system models, the parallel unshared-relay broadcast channel and the parallel shared-relay broadcast channel. In the first system, each relay node is peculiar to one of the users and does not assist any other user.
openaire   +1 more source

A cheap relaying protocol for orthogonal relay channels

2008 IEEE International Conference on Acoustics, Speech and Signal Processing, 2008
The proposed relaying scheme, which is an optimized scalar quantize-and-forward (QF) protocol, has at least three attractive features: 1. it is simple; 2. it exploits the signal-to-noise ratios (SNR) of the source-relay and relay-destination channels; 3.
Brice Djeumou, Samson Lasaulce, Andrew G. Klein   +2 more
openaire   +1 more source

Broadcast-relay-broadcast channels

2010 Conference Record of the Forty Fourth Asilomar Conference on Signals, Systems and Computers, 2010
In this paper, we study the achievable rate regions of broadcast-relay-broadcast channels. The source broadcasts information to the users. A number of parallel relays are used to assist users. Each relay receives information from the source and forwards information to users. The relays also broadcast the forwarded information to all users.
openaire   +1 more source

Greedy Successive Relaying for the Multicarrier Diamond Relay Channel

2021 National Conference on Communications (NCC), 2021
We propose a new decode-and-forward (DF) protocol called Greedy Successive Relaying (GSR) protocol for the M-relay multicarrier diamond relay channel. We consider the diamond channel with half-duplex relays. The GSR protocol uses two states and the relays are partitioned into two sets, A and B.
Antony V. Mampilly, Srikrishna Bhashyam
openaire   +1 more source

Resource Allocation for the Parallel Relay Channel with Multiple Relays

IEEE Transactions on Wireless Communications, 2011
A cooperative network where the transmission between two nodes is assisted by many half-duplex relays over parallel Gaussian channels is considered. The parallel channel model is suitable for a broadband system, such as orthogonal frequency division multiplexing or a block fading channel. For the decode-and-forward protocol, an optimization problem for
BAKANOGLU K, ERKIP E, TOMASIN, STEFANO
openaire   +3 more sources

Source Transmission over Relay Channel with Correlated Relay Side Information

2007 IEEE International Symposium on Information Theory, 2007
We consider transmission of a Gaussian source over a Gaussian relay channel, where the relay terminal has access to correlated side information. We propose several cooperative joint source-channel coding strategies that utilize both the broadcast nature of the wireless transmission and/or the availability of the correlated side information at the relay,
Deniz Gunduz, Chris T. K. Ng, Elza Erkip, Andrea J. Goldsmith   +3 more
openaire   +2 more sources

Joint Network-Channel Design with Destination-Relay Feedback in Multiple-Access Relay Channel

2010 International Conference on Internet Technology and Applications, 2010
The multiple-access relay channel (MARC) based on network coding, typically with two sources, one relay, and one destination, has been proposed in recent papers as an approach to achieve diversity gain in wireless networks and reduce the number of transmissions by the relay node. However, conventional network-coding-based MARC scheme wastes the channel
Jishun Wang, Yun Liu, Yunhua Tan, Bocheng Zhu   +3 more
openaire   +1 more source

Multiple-Access Relay Channel with Network Coding and Non-Ideal Source-Relay Channels

2007 4th International Symposium on Wireless Communication Systems, 2007
The multiple-access relay channel (MARC) based on network coding has been proposed in recent papers as a means to achieve diversity gain in wireless networks, at the same time reducing the number of transmissions by a relay node. In MARC, multiple sources transmit to a common destination with the assistance of a single relay.
Dereje H. Woldegebreal, Holger Karl
openaire   +1 more source