Relevant bibliographies by topics / OTFS

Academic literature on the topic 'OTFS'

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Published: 10 December 2022
Last updated: 6 September 2023

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Journal articles on the topic "OTFS"

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Siluveru, Mounika, Dharavath Nanda, and RadhaKrishna Karne. "Study and Analysis of OTFS and OFDM." Journal of Artificial Intelligence, Machine Learning and Neural Network, no. 26 (November 29, 2022): 13–23. http://dx.doi.org/10.55529/jaimlnn.26.13.23.

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High mobility wireless communication systems have been proposed to be robust to channel-induced Doppler shift using Orthogonal Time Frequency Space (OTFS) modulation. The OTFS modulation technique is described in this paper. In addition to being in the delay-Doppler (DD) domain, OTFS has a unique and important feature. The OTFS modulation offers maximum diversity over frequency and time when coupled with an equalizer. This technique converts fading, time-varying wireless channels into time-independent, non-fading interactions that reveal their underlying geometry. Even in challenging 5G deployment settings, OTFS achieves Massive MIMO throughput gains by scaling throughput linearly with MIMO order. An analysis of peak to average power ratio (PAPR) of OFTS modulation wave forms is presented in this paper. OTFS with rectangular pulses is characterized analytically using the complementary cumulative distribution function (CCDF). The simulated CCDF for the PAPR of OTFS is compared with that for orthogonal frequency division multiplexing (OFDM) for different pulse shapes. The results show that OTFS has a better PAPR than OFDM.
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Guo, Xiaopeng, Biao Wang, Yunan Zhu, Zide Fang, and Zhaoyue Han. "Hamming Distance Optimized Underwater Acoustic OTFS-IM Systems." Entropy 25, no. 7 (June 24, 2023): 972. http://dx.doi.org/10.3390/e25070972.

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The orthogonal time frequency space (OTFS) modulation technique can provide reliable communication in time-varying channels. Due to the dispersive characteristics of underwater acoustic channels, this paper proposes an OTFS-IM underwater acoustic communication system based on Hamming distance optimization to reduce the impact of dispersion in underwater acoustic communication. Firstly, the OTFS-IM underwater acoustic communication system is introduced, which introduces index modulation into the Delay–Doppler (DD) domain to make the OTFS system have stronger anti-Delay–Doppler capability. In contrast, since there is index sequence redundancy in a specific index combination, a Hamming distance optimization model is used to eliminate the redundant combination in the specific index combination sequence and further improve the bit error rate performance of the system. In addition, the Hamming distance optimized OTFS-IM underwater acoustic communication system is verified by simulation analysis. The results show that the proposed Hamming distance optimized OTFS-IM can achieve more reliable bit error rate performance.
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Zhang, Yuzhi, Shumin Zhang, Bin Wang, Yang Liu, Weigang Bai, and Xiaohong Shen. "Deep Learning-Based Signal Detection for Underwater Acoustic OTFS Communication." Journal of Marine Science and Engineering 10, no. 12 (December 6, 2022): 1920. http://dx.doi.org/10.3390/jmse10121920.

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Orthogonal time frequency space (OTFS) is a novel two-dimensional (2D) modulation technique that provides reliable communications over time- and frequency-selective channels. In underwater acoustic (UWA) channel, the multi-path delay and Doppler shift are several magnitudes larger than wireless radio communication, which will cause severe time- and frequency-selective fading. The receiver has to recover the distorted OTFS signal with inter-symbol interference (ISI) and inter-carrier interference (ICI). The conventional UWA OTFS receivers perform channel estimation explicitly and equalization to detect transmitted symbols, which requires prior knowledge of the system. This paper proposes a deep learning-based signal detection method for UWA OTFS communication, in which the deep neural network can recover the received symbols after sufficient training. In particular, it cascades a convolutional neural network (CNN) with skip connections (SC) and a bidirectional long short-term memory (BiLSTM) network to perform signal recovery. The proposed method extracts feature information from received OTFS signal sequences and trains the neural network for signal detection. The numerical results demonstrate that the SC-CNN-BiLSTM-based OTFS detection method performs with a lower bit error rate (BER) than the 2D-CNN, FC-DNN, and conventional signal detection methods.
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Ren, Huarong, Weikai Xu, and Lin Wang. "Multiple-Mode Orthogonal Time Frequency Space with Index Modulation." Electronics 11, no. 16 (August 19, 2022): 2600. http://dx.doi.org/10.3390/electronics11162600.

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Recently, orthogonal time frequency space modulation with index modulation (OTFS-IM) has been proposed to improve the bit-error-rate (BER) performance of the OTFS system. However, only some of the grids in the OTFS-IM system are activated, resulting in low spectral efficiency (SE). In order to solve this problem, a new scheme called multiple-mode OTFS-IM (MM-OTFS-IM) is proposed in this paper. In the proposed scheme, all grids are activated to transmit modulation bits. Each grid in the subblock adopts a different modulation mode, and the index bits are transmitted implicitly by the combination of different constellation modes. At the receiver, a distance-based signal detection algorithm is designed, which uses the distance matrix to find the combination of the minimum sum of elements to recover the index bits. The simulation results demonstrate the enhanced performance of the proposed scheme in the time-varying channels.
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Fan, Yuxiang. "Performance Analysis of NOMA Transmission Systems Based on OTFS." Journal of Physics: Conference Series 2447, no. 1 (March 1, 2023): 012009. http://dx.doi.org/10.1088/1742-6596/2447/1/012009.

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Abstract Orthogonal time frequency space (OTFS) and non-orthogonal multiple-access (NOMA) are both wireless transmission technologies suitable for high-speed scenarios. This paper proposes a cross-domain transmission scheme combining OTFS and NOMA applicable to the Internet of vehicles. We establish a channel model of cross-domain transmission. Based on the downlink, we deduce the expression for the SINR of the transmitted signal. We simulate and analyze the spectrum efficiency and other performance from the perspective of the system level. At last, we make a comparison between the OTFS-based NOMA system and the OFDM-based NOMA system. Numerical results manifest that OTFS-NOMA has better performance in terms of outage spectrum efficiency.
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Abushattal, Abdelrahman, Salah Eddine Zegrar, Ayhan Yazgan, and Hüseyin Arslan. "A Comprehensive Experimental Emulation for OTFS Waveform RF-Impairments." Sensors 23, no. 1 (December 21, 2022): 38. http://dx.doi.org/10.3390/s23010038.

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The orthogonal time-frequency space (OTFS) waveform exceeds the challenges that face orthogonal frequency division multiplexing (OFDM) in a high-mobility environment with high time-frequency dispersive channels. Since radio frequency (RF) impairments have a direct impact on waveform behavior, this paper investigates the experimental implementation of RF-impairments that affect OTFS waveform performance and compares them to the OFDM waveform as a benchmark. Firstly, the doubly-dispersive channel effect is analyzed, and then an experimental framework is established for investigating the impact of RF-impairments, including non-linearity, carrier frequency offset (CFO), I/Q imbalances, DC-offset, and phase noise are considered. The experiments were conducted in a real indoor wireless environment using software-defined radio (SDR) at carrier frequencies of 2.4 GHz and 5 GHz based on the Keysight EXG X-Series devices. The comparison of the performances of OFDM and OTFS in the presence of RF-impairments reveals that OTFS significantly outperforms OFDM.
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Zhang, Mi, Xiaochen Xia, Kui Xu, Xiaoqin Yang, Wei Xie, Yunkun Li, and Yang Liu. "A Structured Sparse Bayesian Channel Estimation Approach for Orthogonal Time—Frequency Space Modulation." Entropy 25, no. 5 (May 6, 2023): 761. http://dx.doi.org/10.3390/e25050761.

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Orthogonal time–frequency space (OTFS) modulation has been advocated as a promising waveform for achieving integrated sensing and communication (ISAC) due to its superiority in high-mobility adaptability and spectral efficiency. In OTFS modulation-based ISAC systems, accurate channel acquisition is critical for both communication reception and sensing parameter estimation. However, the existence of the fractional Doppler frequency shift spreads the effective channels of the OTFS signal significantly, making efficient channel acquisition very challenging. In this paper, we first derive the sparse structure of the channel in the delay Doppler (DD) domain according to the input and output relationship of OTFS signals. On this basis, a new structured Bayesian learning approach is proposed for accurate channel estimation, which includes a novel structured prior model for the delay-Doppler channel and a successive majorization–minimization (SMM) algorithm for efficient posterior channel estimate computation. Simulation results show that the proposed approach significantly outperforms the reference schemes, especially in the low signal-to-noise ratio (SNR) region.
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Raviteja, P., Yi Hong, Emanuele Viterbo, and Ezio Biglieri. "Effective Diversity of OTFS Modulation." IEEE Wireless Communications Letters 9, no. 2 (February 2020): 249–53. http://dx.doi.org/10.1109/lwc.2019.2951758.

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Mohammadi, Abderrahim, Saad Chakkor, Ahmed El Oualkadi, Mohamed Moussaoui, Aziz Dkiouak, and Mostafa Baghouri. "Performance Evaluation of OTFS and OFDM for 6G Waveform." ITM Web of Conferences 48 (2022): 01015. http://dx.doi.org/10.1051/itmconf/20224801015.

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Orthogonal time frequency space (OTFS) modulation is a coming technique addressing the challenges of 5G and 6G. It’s appeared to bring about outstanding error performance in delay – Doppler (DeDo) channels. Still, a really fair comparison with its competitor's direct orthogonal frequency division multiplexing and is extensively used in this participation, we will make a comparison of the performance of OTFS and OFDM with the digital modulation format in terms of bit error rate (BER) versus signal-to-noise rate (SNR) for the 16- QAM technique. From the numerical simulations under MATLAB, the results showed that the OTFS admits a small BER to the OFDM in given cases
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Liang, Wei, Xuan Liu, Jia Shi, Lixin Li, and Junfan Hu. "Underlying Security Transmission Design for Orthogonal Time Frequency Space (OTFS) Modulation." Sensors 22, no. 20 (October 18, 2022): 7919. http://dx.doi.org/10.3390/s22207919.

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With the aim of ensuring secure transmission in high-mobility wireless scenarios, this paper proposes a 2D permutation-aided Orthogonal Time Frequency Space (OTFS) secure transmission scheme, which uses the Gosudarstvennyi Standard (GOST) algorithm to perform disturbance control on the OTFS modulation domain. Furthermore, we develop an improved SeLective Mapping (SLM) algorithm, which can significantly improve the Peak-to-Average Power Ratio (PAPR) problem with very low complexity. In addition, we carry out the security analysis, investigating the proposed scheme’s resistance performance to a range of effective attacks. Finally, our numerical results show that our proposed transmission scheme can guarantee the underlying security property of OTFS.
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Dissertations / Theses on the topic "OTFS"

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Wagner, Michael. "Concepts for In-memory Event Tracing." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-172882.

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This thesis contributes to the field of performance analysis in High Performance Computing with new concepts for in-memory event tracing. Event tracing records runtime events of an application and stores each with a precise time stamp and further relevant metrics. The high resolution and detailed information allows an in-depth analysis of the dynamic program behavior, interactions in parallel applications, and potential performance issues. For long-running and large-scale parallel applications, event-based tracing faces three challenges, yet unsolved: the number of resulting trace files limits scalability, the huge amounts of collected data overwhelm file systems and analysis capabilities, and the measurement bias, in particular, due to intermediate memory buffer flushes prevents a correct analysis. This thesis proposes concepts for an in-memory event tracing workflow. These concepts include new enhanced encoding techniques to increase memory efficiency and novel strategies for runtime event reduction to dynamically adapt trace size during runtime. An in-memory event tracing workflow based on these concepts meets all three challenges: First, it not only overcomes the scalability limitations due to the number of resulting trace files but eliminates the overhead of file system interaction altogether. Second, the enhanced encoding techniques and event reduction lead to remarkable smaller trace sizes. Finally, an in-memory event tracing workflow completely avoids intermediate memory buffer flushes, which minimizes measurement bias and allows a meaningful performance analysis. The concepts further include the Hierarchical Memory Buffer data structure, which incorporates a multi-dimensional, hierarchical ordering of events by common metrics, such as time stamp, calling context, event class, and function call duration. This hierarchical ordering allows a low-overhead event encoding, event reduction and event filtering, as well as new hierarchy-aided analysis requests. An experimental evaluation based on real-life applications and a detailed case study underline the capabilities of the concepts presented in this thesis. The new enhanced encoding techniques reduce memory allocation during runtime by a factor of 3.3 to 7.2, while at the same do not introduce any additional overhead. Furthermore, the combined concepts including the enhanced encoding techniques, event reduction, and a new filter based on function duration within the Hierarchical Memory Buffer remarkably reduce the resulting trace size up to three orders of magnitude and keep an entire measurement within a single fixed-size memory buffer, while still providing a coarse but meaningful analysis of the application. This thesis includes a discussion of the state-of-the-art and related work, a detailed presentation of the enhanced encoding techniques, the event reduction strategies, the Hierarchical Memory Buffer data structure, and a extensive experimental evaluation of all concepts.
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Luu, D. (Duc). "OTSS: Oulu traffic simulation system." Master's thesis, University of Oulu, 2017. http://jultika.oulu.fi/Record/nbnfioulu-201710112981.

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Abstract. This thesis presents the design and the implementation of Oulu Traffic Simulation System (OTSS), a traffic simulation system for the City of Oulu, Finland. Following agent-based approach, the simulation generates artificial agents that represent the population synthesis of the City of Oulu. Data from several sources, including official statistics, government-organized open data and crowdsourced information were collected and used as input for the simulation. Two traffic demand models are presented in this thesis: (1) the random model which generates traffic trips as random, discrete events; and (2) the activity-based model which defines traffic trips as sequential events in the agents’ day plan. The software development of the system follows the spiral model of software development and enhancement. During the implementation, several development cycles were conducted before the UML software design. The system was executed on two computation systems to test its real-time performance. To evaluate the traffic models, data extracted from the simulation was compared with aggregated survey data from Finnish Transport Agency and traffic count stations around the city. The results showed that a typical server is capable of running the simulation, and even though there were differences in the duration and distance of individual trips, the simulation reflects real-life traffic count significantly well.
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Lang, Ursula Friederike. "Oktoberfest-Triage-Evaluationsstudie 1998 (OTES ’98)." Diss., lmu, 2001. http://nbn-resolving.de/urn:nbn:de:bvb:19-3638.

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Kuai, Wenlin. "Faisabilité de transistors organiques à effet de champ fabriqués entièrement en solution." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S013/document.

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Le travail entre dans le cadre de la nouvelle tendance à la recherche d’une électronique mécaniquement flexible basée sur des transistors en couche mince constitués uniquement de matériaux organiques (OTFT). OTFT de type n et de type p ont été fabriqués par la technique de dépôt par impression (inkjet) et étudiés. Les paramètres d’impression (jetabilité, mouillabilité, imprimabilité et possibilité d’obtention de différentes formes), de chaque encre permettant le dépôt de couches conductrices, isolantes et semiconductrices, ont été systématiquement étudiés. Les OTFT de type n basés sur du C60 se sont montrés non fiables, principalement du fait de la faible solubilité du C60 dans les solvants organiques. Les OTFT de type basés sur du Tips-pentacene ont montré par contre une grande fiabilité. Le travail global constitue une large revue des problèmes et difficultés rencontrés dans la fabrication de transistors fabriqués entièrement par impression jet d’encre. Des solutions ont été trouvées et de nouvelles idées sont proposées
Present work deals with the new trend to get highly flexible electronics by using fully Organic Thin-Film Transistor (OTFT) as the basic element of this electronics. Fully organic n-type as well as p-type OTFT processed by inkjet printing are studied. Printing parameters of each ink, jettability, wetting, printability, and patterns optimization, leading to the deposition of conductive contacts, gate insulator and semiconducting active layer are studied. Process of n-type OTFT based on C60 is shown as unreliable, mainly due to the poor solubility of C60 in organic solvent. In the contrary, p-type OTFTs based on Tips-pentacene are much more reliable. The work is a large overview of the issues and the difficulties that have been to jump and to solve in the way to fabricate fully printed organic transistors. Some solutions have been given and new ideas have been proposed
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Burnside, John. "Reintroduction and conservation of the Great Bustard Otis tarda." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604569.

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Conservation reintroduction aims to establish an organism into an area from where it has disappeared or was extirpated. Monitoring is essential to identify the factors that underpin successful establishment and persistence of a self-sustaining population. The Great Bustard (Otis tarda) is globally threatened and became extinct as a breeding species in the United Kingdom (UK) in 1832. Trial releases began in 2004 to reintroduce the Great Bustard to the UK based on the release of captive-reared chicks transported from a source population in Russia. The aim of this research was to investigate the factors influencing the establishment of a founder population of Great Bustards in the UK. In Chapter 1, I set the context of the reintroduction science and management in the world today and explore the issues surrounding it. Chapter 2 sets the baseline by which to measure the Great Bustard reintroduction project using the first five years of releases (2004 – 2008). Estimating vital rates and modelling population growth, I show that low recruitment to the founder population is a limitation for establishment. Chapters 3 and 4 investigate post-release survival and dispersal, both important variables in population establishment. By modelling individual post-release survival I show that earlier date of release can improve survival and could be used to improve recruitment. Conversely, post-release dispersal had mixed implication for the management of the reintroduced population. Surviving Great Bustards incorporated the release site into their annual range and as their breeding site. However, the birds had traversed large areas reducing our ability to monitor and control the environment of individuals. In Chapter 5, the research focus moves from the reintroduction project to an examination of the impact of disturbance and conspecific attraction (presence of conspecifics positively influences the movement of individuals) in habitat selection in a small extant population of Great Bustards. I show that the spatial distribution of display sites is influenced by anthropogenic disturbance; however, the number of males attending the display sites is influenced by the abundance of female conspecifics. The management implications of this result are that the attraction to conspecifics is an important factor in habitat selection. Finally, in Chapter 6, I discuss project limitations, potential interventions and identify future areas of research.
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Líčeník, Lukáš. "Motivace a stimulace zaměstnanců ve firmě OTIS a. s." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2012. http://www.nusl.cz/ntk/nusl-223466.

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The subject of my diploma thesis is motivation and stimulation of employees in the Otis Company. This thesis is divided into two parts and includes theoretical and practical elaboration of the issue. The first part provides a theoretical basis related to motivation, stimulating and remuneration of employees. In the practical part I analysed the current situation of the chosen company. Based on detected results I identified key problem areas and I made a proposal for improving of existing incentive system.
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Belgardt, Christian. "Herstellung mikrostrukturierter OTS-Monolagen auf Siliziumoxidoberflächen." Master's thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-86379.

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Die Oberflächeneigenschaften eines Festkörpers können mit Hilfe dünner, durch Selbstorganisation gebildeter Molekülschichten aus Alkoxysilan-Molekülen gezielt verändert werden. Mikrostrukturierte selbstangeordnete Monolagen (SAM) können für die Anwendung in Bauelementen aus organischen Halbleitern von großem Interesse sein. Mikrokontaktdruck und Photolithographie sind zwei etablierte Verfahren, die jedoch Vorlagen und Masken zur Strukturierung benötigen. Dadurch entstehen bei häufig wechselnden Strukturen nicht zu vernachlässigende Rüstzeiten und Kosten. In der vorliegenden Arbeit wird die Erzeugung lateral strukturierter Schichten von Octadecyltrichlorsilan (OTS) auf Siliziumoxidoberflächen am konkreten Beispiel zweier alternativer, sowohl maskenloser als auch kontaktloser Methoden demonstriert: (i) Tintenstrahlverfahren als rein additive Strukturierung, und (ii) laserinduzierte, photothermische Desorption als subtraktive Strukturierung einer OTS-SAM . Für das Tintenstrahldruckverfahren wird an einem Kontaktwinkelmessgerät eine Methode zur Beobachtung und Auswertung der Tropfenverdampfung implementiert und ein Modell für kleine Tropfen entwickelt. Für die subtraktive Strukturierung werden an einem selbst entwickelten Versuchsaufbau die leistungs- und geschwindigkeitsabhängige Strukturbreite untersucht. Die Ergebnisse der beiden Technologieansätze werden verglichen
With help of thin layers of alkoxysilane molecules formed by self-assembly, the surface properties of solids can be controlled. Microstructured self-assembled monolayers (SAMs) are interesting for applications in components based on organic semiconductors. Two established technologies for the structuring of molecular monolayers are microcontact printing and photolithography, for which templates and masks need to be structured. In this way, setting times and costs are high if variable patterns have to be structured. In this work, the fabrication of laterally structured monolayers from octadecyltrichlorosilane (OTS) is demonstrated for two examples of alternative, both template-free and maskless technologies: (i) inkjet as a purely additive method, and (ii) photothermal laser desorption as a subtractive structuring of an OTS-SAM. For the inkjet technology, a method for the observation and analysis of the evaporation of a droplet is implemented at a goniometer and a mathematical model for small inkjet droplets is extrapolated, For the subtractive laser structuring, the achievable patterning resolution is investigated as a function of laser intensity and scanning speed. The results of both technological approaches are compared
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Schmidt, Rüdiger. "Perylene bisimide and acene derivatives as organic semiconductors in OTFTs." kostenfrei, 2008. http://nbn-resolving.de/urn/resolver.pl?urn=nbn:de:bvb:20-opus-29314.

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Hizon, John Richard. "Reconfigurable CMOS OTAs for filters in a multi-standard receiver." Thesis, Imperial College London, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540631.

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Za'aba, Nor. "Electrical, environmental and optical stress effects on PS-DNTT OTFTs." Thesis, Bangor University, 2018. https://research.bangor.ac.uk/portal/en/theses/electrical-environmental-and-optical-stress-effects-on-psdntt-otfts(d44daf1d-ab86-4c14-92ae-c0f21ba8f0de).html.

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Exposure to moisture and elevated temperatures in organic thin film transistor (OTFT) usually results in significant degradation in the electrical performance. In this thesis the effects of temperature, T, and relative humidity, RH, on PS-DNTT OTFTs are investigated. Device characteristics were measured after 30-min exposure to RH that was gradually increased from 20% to 80% with T fixed at 20 oC and also for T increasing from 20 oC to 90 oC with RH held at 10%. The turn-on and threshold voltages show a negative shift with minimal change in mobility upon exposure to higher RH and T. A very minimal change was observed in the deeper states in the density of states (DoS) that was extracted from transfer characteristics in the linear regime using the Grünewald approach. These results suggest that OTFT instability is due to the flatband voltage shift caused by hole trapping/detrapping in the polystyrene gate dielectric or at the polystyrene/DNTT interface. Understanding the origin of electrical instability in OTFTs over long periods of time is also essential to realize high performance circuits. In this thesis, the effects of bias stress on PS-DNTT OTFTs is investigated over a range of temperature and relative humidity. It was found that the threshold voltage, VT, always shifted in the direction of the applied gate voltage. It was also observed that the threshold voltage shift, ΔVT, reduced as the drain voltage increased. The time-dependences of ΔVT in both linear and saturation regimes are well described by the stretched exponential function. Contrary to most previous reports, the threshold voltage at long times, VT(∞), asymptotes to a value well below the applied gate voltage. The VT change is minimal with increasing humidity under saturation bias and temperature. In all cases, the DoS exhibits similar behavior with weak features appearing at the deeper states. This is unlikely to be related to DNTT as there is no change in the gate-voltage dependence of mobility, but rather due to a changing flat-band voltage when electron/hole occupancy of interface states changes as the device turns on. Effect of illumination on the electrical performance as well the underlying physics of these effects are important for the development of several applications such as the backplane for display technology and photosensors. In this thesis the effect of illumination on PS-DNTT OTFTs has been investigated with light of different wavelengths and intensities. The greatest effect was observed at 460 nm with significant changes occuring in the subthreshold slope. Interestingly the profile of the deeper states in the DoS spectrum did apparently change. It was also found that changes in threshold voltage, turn-on voltage, subthreshold slope and responsivity all appear to saturate at higher light intensity due to a trap limited effect. Since there is no significant change observed in mobility, the DoS changes can be explained by (i) trapping of photogenerated electrons, (ii) an unstable shift in the light-induced flat-band ΔVFB, caused by detrapping or neutralization of electrons as the transistor is turned on so that ΔVT(∞) < ΔVON(∞), (iii) accumulation of electrons in DNTT near to source contact or (iv) the effect of the electron quasi Fermi level, QFL. The effect of bias stress and illumination on PS-DNTT has also been investigated with different wavelengths, time and intensity. It was observed that the transfer characteristic shows a parallel shift toward more positive voltages under positive bias stress (PBS) regardless of the wavelength. However under negative bias stress (NBS) at λ ≥ 520 mm, the transfer characteristic shifts negatively due to the dominant effect of hole trapping at the PS-DNTT interface.
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Books on the topic "OTFS"

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Otis!: The Otis Redding story. New York: St. Martin's Press, 2001.

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Long, Loren. Otis. New York: Philomel Books, 2009.

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Otis. New York: Philomel Books, 2009.

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Bynum, Janie. Otis. San Diego: Harcourt, 2000.

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Bynum, Janie. Otis. San Diego: Harcourt, 2000.

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Miles, Ellen. Otis. New York: Scholastic Inc., 2011.

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Pohl, Stephan von. Otis Laubert. Klenová: Galerie Klatovy, 2020.

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Beverly, Cleary. Otis Spofford. 3rd ed. New York: Morrow Junior Books, 1999.

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Beverly, Cleary. Otis Spofford. New York: HarperCollins, 2008.

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George, Ulrich, Bantam Skylark, and Copyright Paperback Collection (Library of Congress), eds. Olympic Otis. New York: Bantam Skylark, 1993.

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Book chapters on the topic "OTFS"

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Das, Suvra Sekhar, and Ramjee Prasad. "OTFS Signal Model." In Orthogonal Time Frequency Space Modulation, 89–102. New York: River Publishers, 2022. http://dx.doi.org/10.1201/9781003339021-3.

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Das, Suvra Sekhar, and Ramjee Prasad. "Channel Estimation in OTFS." In Orthogonal Time Frequency Space Modulation, 139–68. New York: River Publishers, 2022. http://dx.doi.org/10.1201/9781003339021-6.

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Das, Suvra Sekhar, and Ramjee Prasad. "Circulant Pulse Shaped OTFS." In Orthogonal Time Frequency Space Modulation, 129–38. New York: River Publishers, 2022. http://dx.doi.org/10.1201/9781003339021-5.

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Das, Suvra Sekhar, and Ramjee Prasad. "Receivers Structures for OTFS." In Orthogonal Time Frequency Space Modulation, 103–27. New York: River Publishers, 2022. http://dx.doi.org/10.1201/9781003339021-4.

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Das, Suvra Sekhar, and Ramjee Prasad. "Nonorthogonal Multiple Access with OTFS." In Orthogonal Time Frequency Space Modulation, 169–90. New York: River Publishers, 2022. http://dx.doi.org/10.1201/9781003339021-7.

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Li, Shuangyang, Weijie Yuan, Jinhong Yuan, and Giuseppe Caire. "ISAC Design Using OTFS Waveforms." In Integrated Sensing and Communications, 269–95. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2501-8_10.

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Jia, Yinhua, Sen Wang, Jing Jin, and Hang Long. "Adaptive Orthogonal Basis Scheme for OTFS." In Communications and Networking, 57–68. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-34790-0_5.

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Lu, Yiming, Lin Zhou, Lin Wang, Sanya Liu, and Chen Chen. "Nonbinary LDPC Coded OTFS System Over Mobile Multipath Channels." In Advances in Wireless Communications and Applications, 45–52. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2255-8_5.

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Ling, Zhilei, Yuxin Wu, Guanyu Zhang, and Songlin Sun. "Integrated Sensing and Communications with OTFS: Application in V2I Communications." In Lecture Notes in Electrical Engineering, 528–37. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-9968-0_64.

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Akila, I. S., S. Uma, and P. S. Poojitha. "Performance Analysis of OTFS Scheme for TDL and CDL 3GPP Channel Models." In Expert Clouds and Applications, 737–47. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2500-9_54.

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Conference papers on the topic "OTFS"

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Poon, Ting-Chung, and Kannan Raj. "Three-dimensional optical transfer functions of an optical heterodyne scanning microscope." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.tuc4.

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Optical scanning systems are broadly used in a variety of imaging schemes in microscopy. However, the image processing operations achievable with a scanning optical system are limited to those corresponding to a real and positive point spread function.1 An optical heterodyne laser scanning system has been introduced to overcome the constraints.2 Here, we investigate the defocusing imaging effect on the optical transfer function (OTF) of the optical heterodyne scanning system and discuss the synthesis of OTFs from defocused 2-D OTFs. Through analytical and simulation results, we show the synthesis of 3-D OTFs using two spatially separated scanning Gaussian laser beams as one example, and two superimposed Gaussian beams apodized by complementary Fresnel zone plates as another example. Low frequency de-emphasis of the obtainable 3-D OFTs is achieved.
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Chen, Wei-Chang, Chang-Hung Lu, and Char-Dir Chung. "Spectrally Precoded OTFS Modulation." In 2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall). IEEE, 2022. http://dx.doi.org/10.1109/vtc2022-fall57202.2022.10012733.

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Kokhanovsky, Alexander A., and Eleanora P. Zege. "Media effects on image transfer." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/cleo_europe.1994.cwf1.

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The optical transfer function (OTF) is the basic characteristic responsible for image transfer through scattering media (aerosol atmosphere, clouds, fogs).1 The mutual coherence function (MCF) of the light field is of great importance for the coherent communication systems. The MCF and the OTF of a scattering medium depends on its microstructure and thickness. To study the effect of the microstructure on the image transfer characteristics the Mie calculations are used to obtain single scattering characteristics and then the Monte Carlo simulations provide OTFs. It is a reliable but cumbersome and time-consuming technique.
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Li, Buyi, and Weijie Yuan. "OTFS Communications-assisted Environment Sensing." In 2023 IEEE 3rd International Symposium on Joint Communications & Sensing (JC&S). IEEE, 2023. http://dx.doi.org/10.1109/jcs57290.2023.10107514.

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Rangamgari, Vivek, Shashank Tiwari, Suvra Sekhar Das, and Subhas Chandra Mondal. "OTFS: Interleaved OFDM with Block CP." In 2020 National Conference on Communications (NCC). IEEE, 2020. http://dx.doi.org/10.1109/ncc48643.2020.9056003.

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Singh, Prem, Himanshu B. Mishra, and Rohit Budhiraja. "Low-Complexity Linear MIMO-OTFS Receivers." In 2021 IEEE International Conference on Communications Workshops (ICC Workshops). IEEE, 2021. http://dx.doi.org/10.1109/iccworkshops50388.2021.9473839.

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Zhang, Chunqiong, Dan Feng, Mengmeng Liu, and Baoming Bai. "Spatial Modulation Based MIMO-OTFS Transmissions." In 2021 IEEE/CIC International Conference on Communications in China (ICCC Workshops). IEEE, 2021. http://dx.doi.org/10.1109/icccworkshops52231.2021.9538858.

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Feng, Xiao, Hamada Esmaiel, Junfeng Wang, Jie Qi, Mingzhang Zhou, Zeyad A. H. Qasem, Haixin Sun, and Yaping Gu. "Underwater Acoustic Communications Based on OTFS." In 2020 15th IEEE International Conference on Signal Processing (ICSP). IEEE, 2020. http://dx.doi.org/10.1109/icsp48669.2020.9320923.

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Gong, Zhihan, Shengheng Liu, and Yongming Huang. "Doppler Diversity Reception for OTFS Modulation." In 2022 IEEE 95th Vehicular Technology Conference (VTC2022-Spring). IEEE, 2022. http://dx.doi.org/10.1109/vtc2022-spring54318.2022.9860675.

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Li, Bei, Tian Xiao, Kai Zhou, Lexi Xu, Guanghai Liu, Bo Wang, Jie Gao, Jian Guan, and Zixiang Di. "Research on OTFS Systems for 6G." In 2022 IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom). IEEE, 2022. http://dx.doi.org/10.1109/trustcom56396.2022.00213.

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Reports on the topic "OTFS"

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Gloudemans, J. Once-through integral system (OTIS): Final report. Office of Scientific and Technical Information (OSTI), September 1986. http://dx.doi.org/10.2172/7010115.

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Kafka, Alan L., and Joseph I. Blaney. Infrasonic Emissions from the Otis AFB Hush House. Fort Belvoir, VA: Defense Technical Information Center, September 1990. http://dx.doi.org/10.21236/ada230615.

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Grandi, P., D. Caviglia, F. Zhang, and D. Li. Evaluation of Existing GMPLS Encoding against G.709v3 Optical Transport Networks (OTNs). Edited by S. Belotti and D. Ceccarelli. RFC Editor, January 2014. http://dx.doi.org/10.17487/rfc7096.

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Pederson, Joel L., and Carol M. Dehler. Geologic map of the Otis 7.5-minute quadrangle, Eddy County, New Mexico. New Mexico Bureau of Geology and Mineral Resources, 2003. http://dx.doi.org/10.58799/of-gm-76.

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Wilson, D. OTS cash disbursement process for HANDI 2000 business management system. Office of Scientific and Technical Information (OSTI), August 1998. http://dx.doi.org/10.2172/10154422.

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Ali, Z., A. Bonfanti, M. Hartley, and F. Zhang. RSVP-TE Extension for Additional Signal Types in G.709 Optical Transport Networks (OTNs). RFC Editor, August 2016. http://dx.doi.org/10.17487/rfc7963.

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Mizrahi, Itzhak, and Bryan A. White. Uncovering rumen microbiome components shaping feed efficiency in dairy cows. United States Department of Agriculture, January 2015. http://dx.doi.org/10.32747/2015.7600020.bard.

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Ruminants provide human society with high quality food from non-human-edible resources, but their emissions negatively impact the environment via greenhouse gas production. The rumen and its resident microorganisms dictate both processes. The overall goal of this project was to determine whether a causal relationship exists between the rumen microbiome and the host animal's physiology, and if so, to isolate and examine the specific determinants that enable this causality. To this end, we divided the project into three specific parts: (1) determining the feed efficiency of 200 milking cows, (2) determining whether the feed- efficiency phenotype can be transferred by transplantation and (3) isolating and examining microbial consortia that can affect the feed-efficiency phenotype by their transplantation into germ-free ruminants. We finally included 1000 dairy cow metadata in our study that revealed a global core microbiome present in the rumen whose composition and abundance predicted many of the cows’ production phenotypes, including methane emission. Certain members of the core microbiome are heritable and have strong associations to cardinal rumen metabolites and fermentation products that govern the efficiency of milk production. These heritable core microbes therefore present primary targets for rumen manipulation towards sustainable and environmentally friendly agriculture. We then went beyond examining the metagenomic content, and asked whether microbes behave differently with relation to the host efficiency state. We sampled twelve animals with two extreme efficiency phenotypes, high efficiency and low efficiency where the first represents animals that maximize energy utilization from their feed whilst the later represents animals with very low utilization of the energy from their feed. Our analysis revealed differences in two host efficiency states in terms of the microbial expression profiles both with regards to protein identities and quantities. Another aim of the proposal was the cultivation of undescribed rumen microorganisms is one of the most important tasks in rumen microbiology. Our findings from phylogenetic analysis of cultured OTUs on the lower branches of the phylogenetic tree suggest that multifactorial traits govern cultivability. Interestingly, most of the cultured OTUs belonged to the rare rumen biosphere. These cultured OTUs could not be detected in the rumen microbiome, even when we surveyed it across 38 rumen microbiome samples. These findings add another unique dimension to the complexity of the rumen microbiome and suggest that a large number of different organisms can be cultured in a single cultivation effort. In the context of the grant, the establishment of ruminant germ-free facility was possible and preliminary experiments were successful, which open up the way for direct applications of the new concepts discovered here, prior to the larger scale implementation at the agricultural level.
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Carter, R. L. Jr. Treated Effluent Disposal Facility (TEDF) Operator Training Station (OTS) System Configuration Management Plan. Office of Scientific and Technical Information (OSTI), June 1994. http://dx.doi.org/10.2172/10103712.

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Martin, Paul J., Scott R. Smith, Pamela G. Posey, Gretchen M. Dawson, and Shelley H. Riedlinger. Use of the Oregon State University Tidal Inversion Software (OTIS) to Generate Improved Tidal Prediction in the East-Asian Seas. Fort Belvoir, VA: Defense Technical Information Center, April 2009. http://dx.doi.org/10.21236/ada499002.

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Carter, R. L. Jr. Computer software design description for the Treated Effluent Disposal Facility (TEDF), Project L-045H, Operator Training Station (OTS). Office of Scientific and Technical Information (OSTI), November 1994. http://dx.doi.org/10.2172/10194597.

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