Results 61 to 70 of about 159,814 (309)
Interference Channels With Full-Duplex Amplify-and-Forward Receiver Cooperations
IEEE Access, 2020 This paper considers a two-transmitter and two-receiver interference channel (IC), where each transmitter sends a message to its desired receiver. In particular, the full-duplex (FD) amplify-and-forward (AF) protocol is adopted to build up the receiver ...
Dan Wang +3 more
doaj +1 more source
UAV Swarms as Amplify-and-Forward MIMO Relays [PDF]
2019 IEEE 20th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2019 Unmanned aerial vehicles provide new opportunities for performance improvements in future wireless communications systems. For example, they can act as relays that extend the range of a communication link and improve the capacity. Unlike conventional relays that are deployed at fixed locations, UAVs can change their positions to optimize the capacity ...
Hanna, Samer +3 more
openaire +2 more sources
Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source
On the Performance of a Wireless Powered Communication System Using a Helping Relay [PDF]
Radioengineering, 2017 This paper studies the outage performance and system throughput of a bidirectional wireless information and power transfer system with a helping relay.
T. N. Nguyen +4 more
doaj
Optimal space-time codes for the MIMO amplify-and-forward cooperative channel
, 2006 In this work, we extend the non-orthogonal amplify-and-forward (NAF) cooperative diversity scheme to the MIMO channel. A family of space-time block codes for a half-duplex MIMO NAF fading cooperative channel with N relays is constructed.
Belfiore, Jean-Claude, Yang, Sheng
core +5 more sources
FEBS Letters, EarlyView.The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li +2 more
wiley +1 more source
Secrecy Performance Analysis of Relay Selection in Cooperative NOMA Systems
IEEE Access, 2019 This paper investigates the security performance of two relay selection schemes for cooperative non-orthogonal multiple access (NOMA) systems, where K randomly distributed relays are employed with either decode-and-forward (DF) or amplify-and-forward (AF)
Zhenling Wang, Zhangyou Peng
doaj +1 more source
Power and Trajectory Optimization for UAV-Enabled Amplify-and-Forward Relay Networks
IEEE Access, 2018 Unmanned aerial vehicle (UAV) is suitable to improve connectivity of wireless communication networks in harsh environment due to its flexible deployment and high mobility.
Xu Jiang +3 more
semanticscholar +1 more source
FEBS Letters, EarlyView.We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee +3 more
wiley +1 more source
Optimal relay selection scheme and outage probability analysis in cooperative wireless networks
Dianxin kexue, 2018 Optimal relay selection can effectively improve the system performance in the communication network with cooperative relays from the view of physical layer security.The optimal relay selection schemes for relay transmission system with multiple single ...
Youhong FENG +5 more
doaj +2 more sources