Results 41 to 50 of about 88,580 (320)
, 2011 This paper studies a spectrum sharing scenario between a cooperative relay network (CRN) and a nearby ad-hoc network. In particular, we consider a dynamic spectrum access and resource allocation problem of the CRN.
Li, Yunzhou +4 more
core +1 more source
Cooperative Full-Duplex Physical and MAC Layer Design in Asynchronous Cognitive Networks [PDF]
, 2017 In asynchronous cognitive networks (CNs), where there is no synchronization between primary users (PUs) and secondary users (SUs), spectrum sensing becomes a challenging task.
Febrianto, Teddy +2 more
core +2 more sources
Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM
FEBS Letters, EarlyView.Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley +1 more source
Spectrum Sensing Optimization in an UAV-Based Cognitive Radio
IEEE Access, 2018 In cognitive radio (CR), the detection performance of traditional spectrum sensing may be decreased due to the multipath fading and shadowing effect. However, unmanned aerial vehicle (UAV) can receive a higher strength signal without suffering severe ...
Xin Liu +3 more
doaj +1 more source
Cooperative Spectrum Sensing Technique Based on Blind Detection Method [PDF]
, 2016 Spectrum sensing is a key task for cognitive radio. Our motivation is to increase the probability of detection of spectrum sensing in cognitive radio.
Siddaiah, P. (P), Vijayalakshmi, B. (B)
core
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
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
A Blockchain-Based Node Selection Algorithm in Cognitive Wireless Networks
IEEE Access, 2020 In cognitive wireless networks, multi-node cooperative spectrum sensing can effectively improve the accuracy of spectrum sensing, but there is a non-linear relationship between the number of nodes and sensing accuracy.
Huang Tangsen, Xiaowu Li, Xiangdong Ying
doaj +1 more source
Cooperative spectrum sensing in IEEE 802.22 standard
2009 IEEE 17th Signal Processing and Communications Applications Conference, 2009 IEEE is developing a wireless communication standard that will take place in cognitive radio class and be valid in the world. Data communication capability supporting is aimed with this standard called IEEE 802.22 to the rural area users in TV bands. In the TV bands, not to cause harmful interference to the existing TV receivers and to communicate in ...
Kulac, Selman +2 more
openaire +2 more sources
On the Impact of User Distribution on Cooperative Spectrum Sensing and Data Transmission with Multiuser Diversity [PDF]
, 2011 In this thesis, we investigate the independent but not identically distributed (i.n.i.d.) situations for spectrum sensing and data transmission. In particular, we derive the false-alarm probability and the detection probability of cooperative spectrum ...
Rao, Anlei
core +1 more source