Results 31 to 40 of about 3,674,005 (341)

Performance Analysis and Comparison of Time-Hopping and Direct-Sequence UWB-MIMO Systems

EURASIP Journal on Advances in Signal Processing, 2005
We analyze the performance of ultra-wideband (UWB) multiple-input multiple-output (MIMO) systems employing various modulation and multiple access (MA) schemes including time-hopping (TH) binary pulse-position modulation (BPPM), TH binary phase-shift ...
Siriwongpairat W Pam, Olfat Masoud, Liu KJ Ray   +2 more
doaj   +1 more source

DIRECT: RNA contact predictions by integrating structural patterns

BMC Bioinformatics, 2019
Background It is widely believed that tertiary nucleotide-nucleotide interactions are essential in determining RNA structure and function. Currently, direct coupling analysis (DCA) infers nucleotide contacts in a sequence from its homologous sequence ...
Yiren Jian, Xiaonan Wang, Jaidi Qiu, Huiwen Wang, Zhichao Liu, Yunjie Zhao, Chen Zeng   +6 more
doaj   +1 more source

Quantum Direct-Sequence Spread-Spectrum CDMA Communication Systems: Mathematical Foundations

IEEE Transactions on Quantum Engineering
This article describes the fundamental principles and mathematical foundations of quantum direct-sequence spread-spectrum code division multiple-access communication systems.
Mohammad Amir Dastgheib, Jawad A. Salehi, Mohammad Rezai   +2 more
doaj   +1 more source

Model Predictive Direct Power Control for Virtual-Flux-Based VSR With Optimal Switching Sequence

IEEE Access, 2022
Three-phase voltage-source rectifier (VSR) has been widely used in energy, industry and other fields in the past few years. Model predictive control with optimal switching sequence (OSS-MPC) has further reduced output current THD and ripples with a ...
Han Shi, Xiang Rong, Ping Tuo, Yuxuan Yao, Zheng Gong   +4 more
doaj   +1 more source

The $^{13}$Carbon footprint of B[e] supergiants [PDF]

, 2010
We report on the first detection of $^{13}$C enhancement in two B[e] supergiants in the Large Magellanic Cloud. Stellar evolution models predict the surface abundance in $^{13}$C to strongly increase during main-sequence and post-main sequence evolution ...
A. Liermann, Bik, Bik, Bonnet, Eisenhauer, Howarth, Kraus, Kraus, Kraus, Kraus, Kraus, Kurucz, Lamers, Lodders, M. Borges Fernandes, M. Kraus, McGregor, Meynet, Meynet, Morris, O. Schnurr, Schaller, Skrutskie, Stahl, Thi, Von Zeipel, Waters, Waters, Zickgraf, Zickgraf, Zickgraf   +30 more
core   +1 more source

direct-sequence spread spectrum [PDF]

, 2000
Abstract : The concepts of spread spectrum with a focus on the widely used direct sequence spread spectrum modulation technique are presented. After examining the fundamental concepts of spread spectrum, direct sequence is discussed in detail, along with various pseudo-noise methodologies, concluding with several examples of commercial applications.
  +4 more sources

Cognitive Radio from Hell: Flipping Attack on Direct-Sequence Spread Spectrum

, 2018
In this paper, we introduce a strong adversarial attack, referred to as the flipping attack, on Direct-Sequence Spread Spectrum (DSSS) systems. In this attack, the attacker, which is appropriately positioned between the transmitter and the receiver ...
Harshan, J., Hu, Yih-Chun
core   +1 more source

Direct determination of diploid genome sequences [PDF]

Genome Research, 2016
Determining the genome sequence of an organism is challenging, yet fundamental to understanding its biology. Over the past decade, thousands of human genomes have been sequenced, contributing deeply to biomedical research. In the vast majority of cases, these have been analyzed by aligning sequence reads to a single reference genome, biasing the ...
Weisenfeld, Neil I., Kumar, Vijay, Shah, Preyas, Church, Deanna M., Jaffe, David B.   +4 more
openaire   +2 more sources

Stressful Events Reported by Childhood Cancer Survivors and Community Controls From the St. Jude Lifetime (SJLIFE) Cohort: A Mixed Method Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Characterizing stressful events reported by childhood cancer survivors experienced throughout the lifespan may help improve trauma‐informed care relevant to the survivor experience. Methods Participants included 2552 survivors (54% female; 34 years of age) and 469 community controls (62% female; 33 years of age) from the St.
Megan E. Ware, Colter K. Clayton, Fang Wang, Sedigheh Mirzaei, Kyla Shelton, Tara M. Brinkman, Victoria Willard, Katianne M. Howard Sharp, Kevin Krull, Lindsay F. Schwartz, Melissa M. Hudson, Gregory T. Armstrong, Kirsten K. Ness, Rachel T. Webster   +13 more
wiley   +1 more source

Novel Algorithm for Joint Channel Estimation and Spreading Sequence Detection in DSSS Systems

IEEE Access
In 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