Results 81 to 90 of about 367,994 (260)

Viterbi-Viterbi Carrier Phase Estimation for Multi-Ring $M$-APSK With Wiener Carrier Phase Noise and Its Performance

IEEE Photonics Journal
High-order modulations are currently widely used in optical communications to increase the data rate. However, due to the existence of laser phase noise, the performance of high-order modulated systems will be greatly degraded.
Qian Wang, Wenqiang Ma, Li Ping Qian, Xinwei Du, Changyuan Yu, Pooi-Yuen Kam   +5 more
doaj   +1 more source

Analysis of Multi-Antenna GNSS Receiver Performance under Jamming Attacks

Sensors, 2016
Although antenna array-based Global Navigation Satellite System (GNSS) receivers can be used to mitigate both narrowband and wideband electronic interference sources, measurement distortions induced by array processing methods are not suitable for high ...
Niranjana Vagle, Ali Broumandan, Gérard Lachapelle   +2 more
doaj   +1 more source

BDS Dual-Frequency Carrier Phase Multipath Hemispherical Map Model and Its Application in Real-Time Deformation Monitoring. [PDF]

Sensors (Basel), 2023
Sun A, Zhang Q, Gao X, Meng X, Zhang Y, Hancock C.   +5 more
europepmc   +1 more source

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

FEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa, Shinya Sugimoto, Toshiro Sato   +2 more
wiley   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

Pseudorange estimation algorithm combining code and carrier phase based on Gaussian sum particle filtering

Tongxin xuebao, 2011
According to the characteristic that code measurements yielded noisy but unambiguous pseudorange estimates and carrier phase measurements were almost noiseless but were affected by integer ambiguity,a novel Gaussian sum particle filter（GSPF） algorithm ...
LI Li-min1, GONG Wen-bin1, LIU Hui-jie1, YU Jin-pei1   +3 more
doaj  

Impacts of the May 2024 Extreme Geomagnetic Storm on Global High‐Accuracy GPS Positioning Solutions

Space Weather
The May 2024 geomagnetic storm has been recognized as the most severe one in the past two decades and was categorized as an “extreme” (G5) event according to the NOAA space weather scales. This study applies Precise Point Positioning (PPP) software PRIDE
Zhe Yang, Y. T. Jade Morton
doaj   +1 more source

Kurtosis-Based Symbol Timing and Carrier Phase/Frequency Tracking. [PDF]

Entropy (Basel), 2021
Moon TK, Gunther JH.
europepmc   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

Transport of Chromium(VI) across a Supported Liquid Membrane Containing Cyanex 921 or Cyanex 923 Dissolved in Solvesso 100 as Carrier Phase: Estimation of Diffusional Parameters. [PDF]

Membranes (Basel), 2023
Alguacil FJ, Robla JI.
europepmc   +1 more source