Results 31 to 40 of about 64,360 (256)
Blind Demodulation of Chaotic Direct Sequence Spread Spectrum Signals Based on Particle Filters
Entropy, 2013 Applying the particle filter (PF) technique, this paper proposes a PF-based algorithm to blindly demodulate the chaotic direct sequence spread spectrum (CDS-SS) signals under the colored or non-Gaussian noises condition.
Yimeng Zhang +5 more
doaj +1 more source
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
Quantum Direct-Sequence Spread-Spectrum CDMA Communication Systems: Mathematical Foundations
IEEE Transactions on Quantum EngineeringThis article describes the fundamental principles and mathematical foundations of quantum direct-sequence spread-spectrum code division multiple-access communication systems.
Mohammad Amir Dastgheib +2 more
doaj +1 more source
IEEE Access, 2021 Dynamic underwater acoustic network is a research hotspot. Due to the complexity and time-varying of underwater acoustic channel, the performance of single-mode underwater acoustic communication system is often limited by the worst channel situation ...
Lanjun Liu +5 more
doaj +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
Multi-User Secure Receiving Algorithm Based on Blind Recovery in MIMO Network
IEEE Access, 2021 In order to optimize the performance of data transmission in multiple input multiple output (MIMO) wireless communication systems, a spread spectrum self-interference system based on channel inverse matrix modulation is proposed.
Yongli An +3 more
doaj +1 more source
Spectrally Shaped Generalized Multitone Direct Sequence Spread Spectrum
IEEE Transactions on Vehicular Technology, 2005 We propose a new modulation scheme called spectrally shaped generalized multitone direct-sequence spread spectrum (S-MT-DS-SS), with adjustable parameters on each subcarrier. The parameters we adjust are each subcarrier signal's amplitude, data rate, chip rate, and the frequency separation between subcarriers.
Matolak, David W, Xiong, Wenhui
openaire +3 more sources
Tau acetylation at K331 has limited impact on tau pathology in vivo
FEBS Letters, EarlyView.We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto +3 more
wiley +1 more source
Novel Algorithm for Joint Channel Estimation and Spreading Sequence Detection in DSSS Systems
IEEE AccessIn this paper, a novel turbo-based algorithm is proposed for joint channel estimation and spreading sequence detection in a Direct Sequence Spread Spectrum (DSSS) system. For the channel estimation, a set of candidate angles is designed in an uncertainty
Seungjun Oh, Hichan Moon
doaj +1 more source
A chaotic Direct-Sequence Spread-Spectrum system for underwater communication
Oceans '02 MTS/IEEE, 2005 The recent advances in acoustic modem technology have enabled the development of Underwater Acoustic Networks (UAN). Application interests include oceanographic information gathering, environmental monitoring or coastal defense. Due to its ability of simultaneously sharing the same frequency band for various users and the poor propagation conditions ...
Azou, Stéphane +2 more
openaire +1 more source