Results 51 to 60 of about 159,814 (309)

OFDM With Index Modulation Assisted by Multiple Amplify-and-Forward Relays

IEEE Wireless Communications Letters, 2019
A multi-relay assisted orthogonal frequency division multiplexing system with index modulation is proposed in this letter, assuming that amplify-and-forward (AF) relaying protocol is adopted at relays.
Guo Sheng, Shuping Dang, Zhenrong Zhang, E. Kočan, M. Pejanović-Djurišić   +4 more
semanticscholar   +1 more source

Full-Duplex Amplify-and-Forward Relaying: Power and Location Optimization [PDF]

IEEE Transactions on Vehicular Technology, 2017
In this paper, we consider a full-duplex (FD) amplify-and-forward relay system and optimize its power allocation and relay location to minimize the system symbol error rate (SER).
Shuai Li, Kun Yang, Mingxin Zhou, Jianjun Wu, Lingyang Song, Yonghui Li, Hongbin Li   +6 more
semanticscholar   +1 more source

Ergodic Capacity Analysis of Amplify-and-Forward MIMO Dual-Hop Systems

, 2008
This paper presents an analytical characterization of the ergodic capacity of amplify-and-forward (AF) MIMO dual-hop relay channels, assuming that the channel state information is available at the destination terminal only.
Jin, Shi, McKay, Matthew R., Wong, Kai-Kit, Zhong, Caijun   +3 more
core   +2 more sources

Structural insights into lacto‐N‐biose I recognition by a family 32 carbohydrate‐binding module from Bifidobacterium bifidum

FEBS Letters, EarlyView.
Bifidobacterium bifidum establishes symbiosis with infants by metabolizing lacto‐N‐biose I (LNB) from human milk oligosaccharides (HMOs). The extracellular multidomain enzyme LnbB drives this process, releasing LNB via its catalytic glycoside hydrolase family 20 (GH20) lacto‐N‐biosidase domain.
Xinzhe Zhang, Naoki Sunagawa, Toma Kashima, Kiyohiko Igarashi, Akimasa Miyanaga, Shinya Fushinobu   +5 more
wiley   +1 more source

Secure Transmission in Amplify-and-Forward Diamond Networks with a Single Eavesdropper

, 2015
Unicast communication over a network of $M$-parallel relays in the presence of an eavesdropper is considered. The relay nodes, operating under individual power constraints, amplify and forward the signals received at their inputs.
Agnihotri, Samar, Kuri, Joy, Sarma, Siddhartha   +2 more
core   +1 more source

Real‐time assay of ribonucleotide reductase activity with a fluorescent RNA aptamer

FEBS Letters, EarlyView.
Ribonucleotide reductases (RNR) synthesize DNA building blocks de novo, making them crucial in DNA replication and drug targeting. FLARE introduces the first single‐tube real‐time coupled RNR assay, which enables isothermal tracking of RNR activity at nanomolar enzyme levels and allows the reconstruction of allosteric regulatory patterns and rapid ...
Jacopo De Capitani, Noemi E. Nwosu, Viktoria Gocke, Müge Kasanmascheff, Hannes Mutschler   +4 more
wiley   +1 more source

Hybrid Full-Duplex and Alternate Multiple Relay Selection and Beamforming in AF Cooperative Networks

IEEE Access, 2018
In this paper, multiple relay selection and beamforming techniques are applied to a dual-hop full-duplex (FD) amplify-and-forward relaying network. We show that our proposed techniques allow the selection to be adaptive to the residual self-interference (
Lutfi Samara, Ala Gouissem, Ridha Hamila
doaj   +1 more source

The Cramer-Rao Bound for channel estimation in block fading amplify-and-forward relaying networks [PDF]

, 2010
In this paper, we express the Cramer-Rao Bound (CRB) for channel coefficient and noise variance estimation at the destination of an Amplify-and- Forward (AF) based cooperative system, in terms of the a posteriori expectation of the codewords.
Aerts, Nico, Avram, Iancu, Moeneclaey, Marc   +2 more
core   +1 more source

The role of histone modifications in transcription regulation upon DNA damage

FEBS Letters, EarlyView.
This review discusses the critical role of histone modifications in regulating gene expression during the DNA damage response (DDR). By modulating chromatin structure and recruiting repair factors, these post‐translational modifications fine‐tune transcriptional programmes to maintain genomic stability.
Angelina Job Kolady, Siyao Wang
wiley   +1 more source

Mechanisms of parasite‐mediated disruption of brain vessels

FEBS Letters, EarlyView.
Parasites can affect the blood vessels of the brain, often causing serious neurological problems. This review explains how different parasites interact with and disrupt these vessels, what this means for brain health, and why these processes matter. Understanding these mechanisms may help us develop better ways to prevent or treat brain infections in ...
Leonor Loira, Sílvia Arroz‐Madeira, Cláudio A. Franco, Sara Silva Pereira   +3 more
wiley   +1 more source