Results 11 to 20 of about 8,343 (256)
The C-terminal domain of yeast Arginyltransferase1 is essential for its catalytic activity. [PDF]
FEBS Open BioArginyltransferase 1 (Ate1), a eukaryotic enzyme, catalyses arginylation, transferring arginine from tRNA‐Arg to the amino terminus of the target protein. Overexpression of Ate1 in yeast is lethal and is dependent on arginylation. This study elucidates how mutations in the cofactor‐binding and active site of Ate1 and truncation of its structural ...
Yadav VK +4 more
europepmc +2 more sources
Multiple-Symbol Differential Sphere Decoding Aided Amplify-and-Forward Differential Space-Time Modulation [PDF]
, 2011 Differential Space-Time Modulation (DSTM) employing multiple antennas provides a diversity advantage in rich scattering environments, whilst the excessive complexity of MIMO channel estimation is avoided.
Ng, Soon +3 more
core +2 more sources
Amplify-and-Forward Relaying Aided Reed-Solomon Coded Hybrid-ARQ Relying on Realistic Channel Estimation [PDF]
, 2010 Channel estimation (CE) plays an important role in determining the achievable performance of coherently detected communications systems. In this paper, the impact of imperfect CE on Reed-Solomon coded Hybrid Automatic-Repeat-Request (ReS/H-ARQ) systems ...
Ngo, Hoang Anh +3 more
core +1 more source
IEICE Transactions on Communications, 2010 In this letter, we analyze the error performance of a code combining based cooperative diversity protocol. For coded transmission schemes, code-combining can obtain a near optimal low rate code by combining repeated codewords. An analytical method for evaluating the performances of such scheme is presented.
Asaduzzaman, Hyung Yun Kong
openaire +2 more sources
Capacity analysis of the successive AF relaying aided cooperative DS-CDMA uplink [PDF]
, 2012 An amplify-and-forward (AF) based successive relaying aided network (SRAN) is designed for a multi-user spread-spectrum scenario conceived for noncoherent (NC) detection in order to convert the typical 50% half-duplex relaying-induced throughput loss to ...
Li, Li +5 more
core +1 more source
Destination Assisted Jamming and Beamforming for Improving the Security of AF Relay Systems
IEEE Access, 2017 In this paper, we propose a destination-assisted jamming and beamforming (DAJB) scheme for physical layer security in a one-way cooperative amplify-and-forward (AF) relay communication system. The system model consists of one source, one destination, one
Nian Ouyang +3 more
doaj +1 more source
Cooperative Detection for Primary User in Cognitive Radio Networks
EURASIP Journal on Wireless Communications and Networking, 2009 We propose two novel cooperative detection schemes based on the AF (Amplify and Forward) and DF (Decode and Forward) protocols to achieve spatial diversity gains for cognitive radio networks, which are referred to as the AF-CDS, (AF-based Cooperative ...
Zhu Jia, Zou Yulong, Zheng Baoyu
doaj +2 more sources
Sensors, 2018 In this research, we investigate a hybrid time-switching relay (TSR)⁻power-splitting relay (PSR) alternate energy harvesting (EH) relaying network over the Rician fading channels.
Tan N. Nguyen +6 more
doaj +1 more source
Multicast Transmissions With Full-Duplex Amplify-and-Forward User Cooperation
IEEE Access, 2020 In order to improve the multicast transmissions, a full-duplex (FD) user cooperation scheme is proposed. In this paper, the transmitter sends the common messages to two FD users, and each user forwards its received signals to its counterpart by amplify ...
Linsong Du, Han Zhang, Chuan Huang
doaj +1 more source
Journal of information and communication convergence engineering, 2013 Cognitive radio has been recently considered a promising technology to improve spectrum utilization by enabling secondary access to licensed bands that are not used by primary users temporarily or spatially. A prerequisite to this secondary access is the lack of interference to the primary system.
Muhammad Sajjad Khan, Insoo Koo
openaire +2 more sources