Results 241 to 250 of about 224,382 (271)

Outdated Relay Selection in Two-Way Relay Network

IEEE Transactions on Vehicular Technology, 2013
In this paper, we consider a two-way relay network (TWRN) with multiple amplify-and-forward (AF) relays, out of which the best one is selected to assist the data communication between two sources. The relay selection is based on the outdated channel state information (CSI), and we study its effect on the system performance in the independent but not ...
null Lisheng Fan, null Xianfu Lei, Rose Qingyang Hu, Winston Seah   +3 more
openaire   +1 more source

Relay-aided cooperative Underwater acoustic communications: Selective relaying

2012 Oceans - Yeosu, 2012
Underwater acoustic communications (UAC) features frequency-dependent signal attenuation, long propagation delay, and doubly-selective fading. Thus, the design of reliable and efficient UAC protocols is very challenging. On the other hand, cooperative relay communications, which can provide reliable data transmission, is a very attractive technology ...
Xilin Cheng, Rui Cao, Fengzhong Qu, Liuqing Yang   +3 more
openaire   +1 more source

Joint relay‐pair selection for buffer‐aided successive opportunistic relaying

Transactions on Emerging Telecommunications Technologies, 2013
ABSTRACTIn this work, we present a buffer‐aided successive opportunistic relaying scheme that aims at improving the average capacity of the network when inter‐relay interference arises between relays that are selected for simultaneous transmission and reception.
Nomikos, N., Vouyioukas, D., Charalambous, T., Krikidis, Ioannis A., Makris, P., Skoutas, D. N., Johansson, M., Skianis, C., Nomikos, N., Vouyioukas, D., Charalambous, T., Krikidis, Ioannis A., Makris, P., Skoutas, D. N., Johansson, M., Skianis, C.   +15 more
openaire   +2 more sources

Relay selection in amplify-and-forward relay networks with frequency selective fading

2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR), 2012
We consider relay selection in cooperative relay networks with frequency selective fading, and focus on a system where multiple amplify-and-forward relays share a single channel orthogonal to the source. We propose a relay selection method that achieves the optimal diversity-multiplexing tradeoff (DMT) as proven by outage analysis. This relay selection
Qingxiong Deng, Andrew G. Klein
openaire   +1 more source

Relays selection with power allocation in relay networks

2015 4th International Conference on Computer Science and Network Technology (ICCSNT), 2015
Recently, the cooperative wireless communication system is attracting attention as 4G and beyond 4G techniques. Transmit rate and diversity are generally enhanced in MIMO systems, however, mobile devices are limited by size or hardware complexity to set many multi-antennas.
openaire   +1 more source

Joint Relay Selection and Relay Ordering for DF-Based Cooperative Relay Networks

IEEE Transactions on Communications, 2012
Relay selection (RS) has widely been studied for both decode-and-forward (DF) and amplify-and-forward (AF) protocols, and relay ordering (RO) was recently proposed for the AF protocol only . The two strategies, RS and RO, have been individually shown to be very effective to enhance the performance of cooperative relay networks. In this letter, we first
MinChul Ju, Il-Min Kim, Dong In Kim
openaire   +1 more source

Adaptive selection relaying protocols with opportunistic relaying in multiple-relay cooperative networks

2011 International Conference on E-Business and E-Government (ICEE), 2011
Cooperative communications is a promising technique to improve high data-rate coverage in the future communications systems, the strategies about selection relays have a huge effect on the performance of system. In this letter, we study two strategies about adaptive selection relaying protocols with opportunistic relaying.
Yalong Zhang, Yuanyuan Gao, Chunming Shen, Baofeng Yang, Ke Li   +4 more
openaire   +1 more source

Jointly optimizing power allocation and relay positions for multi-relay regenerative relaying with relay selection

2010 4th International Conference on Signal Processing and Communication Systems, 2010
In this paper, we consider a dual-hop regenerative relay system consisting of one source node, one destination node and multiple relay nodes. All nodes are equipped with a single antenna except the destination node. We discuss two different relay selection strategies: 1) selection of the best relay; and 2) selection of all reliable relays.
Xiao Juan Zhang, null Yi Gong
openaire   +1 more source

On relay selection in frequency selective channels

2011 Conference Record of the Forty Fifth Asilomar Conference on Signals, Systems and Computers (ASILOMAR), 2011
We consider relay selection in cooperative relay networks with frequency selective fading, and focus on a system where multiple decode-and-forward relays share a single channel orthogonal to the source. We propose a relay selection scheme and end-to-end transciever architecture which employs a simple decision feedback equalizer, and we show ...
Qingxiong Deng, Andrew G. Klein
openaire   +1 more source

Opportunistic dual timer relay selection in MIMO relay networks

MILCOM 2012 - 2012 IEEE Military Communications Conference, 2012
In this paper, we investigate opportunistic buffer-equipped, multi-antenna relay networks with a decode-and-forward relaying strategy. The channel that we are considering includes three key wireless channel effects: path loss, shadowing, and fast fading.
Sungjoon Park, Wayne E. Stark
openaire   +1 more source