Academic literature on the topic 'High symbol rate transmissions'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'High symbol rate transmissions.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "High symbol rate transmissions":
1
Abboud, Maryam K., and Bayan M. Sabbar. "Performance evaluation of high mobility OFDM channel estimation techniques." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 3 (June 1, 2020): 2562. http://dx.doi.org/10.11591/ijece.v10i3.pp2562-2568.
Abstract:
In wireless communication, Orthogonal Frequency Division Multiplexing (OFDM) has been adopted due to its robustness to multipath fading and high data rate transmissions. At the other hand, the performance of OFDM systems severely degraded due to multi-path fading and Doppler frequency shifts in mobile systems, which causes inter-carrier-interference (ICI). Thus, Estimation of channel parameters is required at the receiver using a pre designed estimator where pilot tones are inserted in each OFDM symbol. In this paper, a random pilot data are generated and inserted in each OFDM symbol at equally spaced locations. The performance test of Least Square (LS) and Linear Minimum Mean Square (LMMSE) estimation methods are proposed with Discrete Fourier Transform (DFT) based on both LS and LMMSE, where different ITU channel models are considered in order to compare their performance for data transmission in high mobile systems with different Doppler frequencies exceeds 200 Hz and minimal number of pilots.
2
Sharma, Mahendra, and Santhosh Kumar Singh. "Orthogonality Measurent of OFDM Signal." Indonesian Journal of Electrical Engineering and Computer Science 9, no. 3 (March 1, 2018): 595. http://dx.doi.org/10.11591/ijeecs.v9.i3.pp595-598.
Abstract:
<p>In recent days, Orthogonal Frequency Division Multiplexing is the technique to transmit and receive the signal without any overlapping of the signal. OFDM is also a multiplexing technique as well as modulation technique. It is a multi-carrier transmission technique in which single high data stream is divided into a number of lower rate streams that are transmitted simultaneous over some narrow sub channel. In general, OFDM avoids Inter-Symbol Interference (ISI), Inter-Carrier Interference (ICI) and fault transmissions between source and destination node. To measure the performance of the system by using the parameters like Bit Error rate (BER), Spectrum analysis and signal strength detection. Based on the parameters the best system can be identified.</p>
3
Raybon, Gregory, Andrew Adamiecki, Peter J. Winzer, Sebastian Randel, Luis Salamanca, A. Konczykowska, Filip Jorge, et al. "High Symbol Rate Coherent Optical Transmission Systems: 80 and 107 Gbaud." Journal of Lightwave Technology 32, no. 4 (February 2014): 824–31. http://dx.doi.org/10.1109/jlt.2013.2286963.
4
Rajaram, Akashkumar, Rui Dinis, Dushnatha Nalin K. Jayakody, and Marko Beko. "Secure Information Transmission with Self Jamming SWIPT." Electronics 9, no. 4 (March 30, 2020): 587. http://dx.doi.org/10.3390/electronics9040587.
Abstract:
This article is focused on implementing simultaneous wireless information and power transmission as a physical layer security measure by using artificial noise. A series of high energy precoded symbols is simultaneously transmitted along with the information symbols over a Rayleigh frequency selective fading channel. The high energy precoded symbols act as an artificial noise for the eavesdroppers. The energy symbols are precoded on the basis of a legitimate user’s channel matrix to form a null space vector, which eliminates the interference of energy symbols at the information symbol receiver antennas, while allowing the rectenna to harvest energy from the superimposed information and energy symbols. We analyze the secrecy rate and error rate performance at the receiver under different circumstances, and we show that the performance of the legitimate user can be improved by using the iterative block decision feedback equalization method at the receiver.
5
García-Pérez, A., J. A. Andrade-Lucio, O. G. Ibarra-Manzano, E. Alvarado-Méndez, M. Trejo-Duran, and H. Gutiérrez-Martín. "Efficient Modulation Formats for High Bit-Rate Fiber Transmission." Acta Universitaria 16, no. 2 (August 1, 2006): 17–26. http://dx.doi.org/10.15174/au.2006.184.
Abstract:
The topic of this report will deal with the study of advanced modulation formats for highspeed optical communication systems. Basically, the use of alternate polarization modulation (alP) is considered in order to reduce the inter-symbol interference (ISI) caused mainly by effects such as Chromatic Dispersion (CD), Polarization Mode Dispersion (PMD) and Nonlinear effects. The comparative analysis among the different formats is carried out by means of the obtaining of its different spectrums. A detailed analysis of these and their dependency to the modulation format that generates it is presented. The article presents numerical comparative analysis using commercial software VPI Maker Transmission, where the results obtained show that the formats of alternating polarization are the best results at the bit rate of 40 Gb/s per channel.
6
Nagatani, M., H. Wakita, H. Nosaka, K. Kurishima, M. Ida, A. Sano, and Y. Miyamoto. "75 GBd InP‐HBT MUX‐DAC module for high‐symbol‐rate optical transmission." Electronics Letters 51, no. 9 (April 2015): 710–12. http://dx.doi.org/10.1049/el.2015.0686.
7
Huu Ai, Duong, Dai Tho Dang, Cong Dat Vuong, Van Loi Nguyen, and Khanh Ty Luong. "Average symbol error rate analysis of reconfigurable intelligent surfaces based free-space optical link over Weibull distribution channels." International Journal of Electrical and Computer Engineering (IJECE) 14, no. 1 (February 1, 2024): 443. http://dx.doi.org/10.11591/ijece.v14i1.pp443-450.
Abstract:
Optical wireless communication (OWC) enables wireless connectivity using ultraviolet bands, infrared or visible. With its advantages features as high bandwidth, low cost, and operation in an unregulated spectrum. Free-space optical (FSO) communication systems are near terrestrial as a communication link between transceivers, the link is line-of-sight and successfully transmitted optical signals. Nevertheless, the optical signals transmissions over the FSO channels bring challenges to the system. To overcome the challenges posed by the FSO channels, the most common technique is to use relay stations, the most recent is the reconfigurable intelligent surfaces (RISs) technique. This study introduces a Weibull distribution model for a free-space optical communication link with RISs assisted, the parameter used to evaluate the performance of the system is the average symbol error rate (ASER). The RISs effect is examined by considering the influence of the transmitter beam waist radius, shape parameter, aperture radius, scale parameter, and signal-to-noise ratio on the ASER.
8
Fan, Wei Wei, Bo Li, You Wen Zhang, and Da Jun Sun. "Research of FH-MFSK Underwater Acoustic Communication Based on Non-Binary LDPC Codes." Applied Mechanics and Materials 519-520 (February 2014): 945–52. http://dx.doi.org/10.4028/www.scientific.net/amm.519-520.945.
Abstract:
Compared with binary-modulation, Multiple-modulation can obtain higher rate of transmission in the condition of same symbol-rate. If using binary channel codes with multiple-modulation, there exists an problem of information-loss of the probability from bit to symbol conversion. Underwater acoustic channel is an multipath, time-variation, high-noise and strong doppler-effect wireless channel, which leads to high error-rate caused by signal distortion. To solve the problems above, we adopt FH-MFSK modulation to overcome the inter-symbol interference by multipath. The PN sequence is used as a frame synchronization signal and frequency energy accumulation method is used to detect the frame-synchronization. PN hopping signal is chosen to estimate the doppler frequency-shift and using non-binary LDPC codes based on symbol for channel error codes. Finally, We perform numerical simulations and the experiments on the lake to show that compared with binary LDPC codes, non-binary LDPC codes for multiple-modulation can achieve same error-rate under lower SNR.
9
Ling, Peng, Maolin Li, and Weipeng Guan. "Channel-Attention-Enhanced LSTM Neural Network Decoder and Equalizer for RSE-Based Optical Camera Communications." Electronics 11, no. 8 (April 17, 2022): 1272. http://dx.doi.org/10.3390/electronics11081272.
Abstract:
In an RGB-LED-based optical camera communication system, it is an essential goal to have better performance in the data rate and BER. However, in a higher symbol rate, due to the conventional sampling algorithm, the deterioration of transmission performance brought by the inter-symbol interference and inter-channel interference is significant. Innovatively, in this paper, the sub-image obtained by a captured frame of received video is encoded by a channel-attention-Net-based encoder to generate a descriptor without existing sampling methods. Moreover, we propose an LSTM-based equalizer to decode the descriptor and mitigate transmission performance deterioration. Utilizing the long-short-term memory of an LSTM unit, an equalizer not only can reduce bit error rates but also increase the data rate. The experimental results show that at a symbol rate of 46 kbaud/s, a record-high data rate at 44.03 kbit/s is achieved under random data transmission while still meeting the pre-forward error correction requirement.
10
Zhang, Junwen, and Jianjun Yu. "Generation and Transmission of High Symbol Rate Single Carrier Electronically Time-Division Multiplexing Signals." IEEE Photonics Journal 8, no. 2 (April 2016): 1–6. http://dx.doi.org/10.1109/jphot.2016.2530565.
Dissertations / Theses on the topic "High symbol rate transmissions":
1
Arnould, Aymeric. "Ultra-wideband and high symbol rate transmission systems for next-generation optical fiber communications." Electronic Thesis or Diss., Institut polytechnique de Paris, 2021. http://www.theses.fr/2021IPPAS006.
Abstract:
Les transmissions par fibre optique ont permis le développement de réseaux robustes et performants formant la base du système mondial de télécommunications. Alors que les fibres à faibles pertes et les amplificateurs à fibre dopée à l'erbium (EDFA) ont ouvert la voie au multiplexage en longueur d'onde (WDM), la détection cohérente permet l'utilisation de techniques de modulation et de codage avancées et le traitement du signal numérique (DSP) est utilisé pour compenser les effets physiques de propagation. Dans cette thèse, nous nous intéressons à des solutions pour la prochaine génération de systèmes WDM à détection cohérente. Des amplificateurs optiques à semi-conducteurs (SOA) sont utilisés pour fournir une amplification ultra large bande (UWB) sur plus de 100 nm, permettant un plus large débit en comparaison aux systèmes à EDFA avec une largeur de bande inférieure à 40 nm. Nous montrons que des UWB SOA spécifiques permettent une transmission WDM à haute puissance, et nous démontrons expérimentalement des transmissions UWB WDM mettant à profit la bande passante des SOA. En particulier, nous détaillons la conception de schémas d'amplifications et la caractérisation des effets nonlinéaires spécifiques aux transmissions UWB. Par ailleurs, le développement de transmetteurs à haut débit symbole est encouragé par l'industrie afin de limiter le coût des systèmes optiques WDM, en réduisant le nombre de transmetteurs par fibre. Cette thèse étudie la capacité et les limites de transmetteurs de prochaine génération avec des débits symboles jusqu'à 100 GBd. Nous examinons l'impact du phénomène de bruit de phase augmenté par l'égalisation, une dégradation potentiellement dominante à haut débit symbole. Nous démontrons des transmissions à haut débit symbole, pour des configurations en laboratoire allant jusqu'à des distances transocéaniques, ainsi que dans un essai terrain conduit sur un réseau commercial. En utilisant la mise en forme probabiliste de constellation et des codes correcteurs d'erreur performants, nous mettons en évidence la flexibilité permise par les transmetteurs à haut débit symbole pour répondre aux différents scénarios de transmission qui composent le coeur du réseau des communications InternetOptical fiber transmissions have enabled the development of the high capacity and resilient networks that form the backbone of the modern-day global telecommunication system. Whereas low-loss fibers and erbium doped fiber amplifiers (EDFA) allow wavelength division multiplexing (WDM), coherent detection enables advanced modulation and coding schemes, and digital signal processing (DSP) is used to compensate for physical propagation effects. In this thesis, we address possible solutions for the next generation coherent WDM systems. Semiconductor optical amplifiers (SOA) are used to provide ultra-wideband (UWB) seamless amplification over more than 100 nm, a promising way to scale the throughput compared to conventional systems using EDFA with bandwidth less than 40 nm. We show that custom UWB SOA can enable WDM transmission in high power regime, and we demonstrate UWB WDM experimental transmissions leveraging the SOA bandwidth. In particular, the design of specific amplification schemes is presented, and the nonlinear impairments arising from UWB spectrum transmission are characterized. Furthermore, the industry fosters the development of high symbol rate transceivers to provide cost-efficient optical WDM systems with reduced number of transceivers per fiber link. This work studies the capacity and limitations of next-generation coherent transceivers, operating at symbol-rates up to 100 GBd. We investigate the impact of equalization enhanced phase noise, which is a potentially dominant impairment at high symbol rates. We demonstrate high symbol rate transmissions, from regional distances to ultra-long-haul subsea distances in laboratory conditions, as well as in a field trial over a live commercial traffic network. Using probabilistic constellation shaping and powerful forward error correcting codes, we show the flexibility provided by high symbol rate transceivers to address the different transmission cases that constitute the core of the Internet communication network
2
Nguyen, Trung-Hiên. "Theoretical and experimental study of optical solutions for analog-to-digital conversion of high bit-rate signals." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S110/document.
Abstract:
Les formats de modulation bidimensionnels (i.e. basés sur l’amplitude et la phase de l’onde porteuse) ont gagné depuis peu le domaine des transmissions par fibre optique grâce aux progrès conjoints de l’électronique rapide et du traitement du signal, indispensables pour réaliser les récepteurs opto-électroniques utilisant la détection cohérente des signaux optiques. Pour pallier les limites actuelles en rapidité de commutation des circuits intégrés électroniques, une voie de recherche a été ouverte il y a quelques années, consistant à utiliser des technologies optiques pour faciliter la parallélisation du traitement du signal, notamment dans l’étape d’échantillonnage ultra-rapide du signal rendu possible par des horloges optiques très performantes. Le thème principal de cette thèse concerne l’étude théorique et expérimentale de la fonction de conversion analogique-numérique (ADC) de signaux optiques par un récepteur opto-électronique cohérent, associant les étapes d’échantillonnage optique linéaire, de conversion analogique-numérique et de traitement du signal. Un prototype, utilisant une solution originale pour la source d’échantillonnage, est modélisé, réalisé et caractérisé, permettant la reconstruction temporelle de signaux optiques modulés selon divers formats : NRZ, QPSK, 16-QAM. Les limitations optiques et électroniques du système sont analysées, notamment l’impact sur la reconstruction des signaux de divers paramètres : le taux d’extinction de la source optique, les paramètres de l’ADC (bande passante BW, temps d’intégration et nombre effectif de bits ENOB). Par ailleurs, de nouveaux algorithmes de traitement du signal sont proposés dans le cadre de la transmission optique cohérente à haut débit utilisant des formats de modulation bidimensionnels (amplitude et phase) : deux solutions sont proposées pour la compensation du déséquilibre de quadrature IQ dans les transmissions mono-porteuses: une méthode originale de l’estimation du maximum du rapport signal sur bruit ainsi qu’une nouvelle structure de compensation et d’égalisation conjointes; ces deux méthodes sont validées expérimentalement et numériquement avec un signal 16-QAM. Par ailleurs, une solution améliorée de récupération de porteuse (décalage de fréquence et estimation de la phase), basée sur une décomposition harmonique circulaire de la fonction de maximum de vraisemblance logarithmique, est validée numériquement pour la première fois dans le contexte des transmissions optiques (jusqu’à une modulation de 128-QAM). Enfin les outils développés dans ce travail ont finalement permis la démonstration d’une transmission sur 100 km d’un signal QPSK à 10 Gbaud fortement limité par un bruit de phase non linéaire et régénéré optiquement à l’aide d’un limiteur de puissance préservant la phase basé sur une nanocavité de cristal photoniqueBi-dimensional modulation formats based on amplitude and phase signal modulation, are now commonly used in optical communications thanks to breakthroughs in the field of electronic and digital signal processing (DSP) required in coherent optical receivers. Photonic solutions could compensate for nowadays limitations of electrical circuits bandwidth by facilitating the signal processing parallelization. Photonic is particularly interesting for signal sampling thanks to available stable optical clocks. The heart of the present work concerns analog-to-digital conversion (ADC) as a key element in coherent detection. A prototype of linear optical sampling using an original solution for the optical sampling source, is built and validated with the successful equivalent time reconstruction of NRZ, QPSK and 16-QAM signals. Some optical and electrical limitations of the system are experimentally and numerically analyzed, notably the extinction ratio of the optical source or the ADC parameters (bandwidth, integration time, effective number of bits ENOB). Moreover, some new DSPs tools are developed for optical transmission using bi-dimensional modulation formats (amplitude and phase). Two solutions are proposed for IQ quadrature imbalance compensation in single carrier optical coherent transmission: an original method of maximum signal-to-noise ratio estimation (MSEM) and a new structure for joint compensation and equalization; these methods are experimentally and numerically validated with 16-QAM signals. Moreover, an improved solution for carrier recovery (frequency offset and phase estimation) based on a circular harmonic expansion of a maximum loglikelihood function is studied for the first time in the context of optical telecommunications. This solution which can operate with any kind of bi-dimensional modulation format signal is numerically validated up to 128-QAM. All the DSP tools developed in this work are finally used in a demonstration of a 10 Gbaud QPSK 100 km transmission experiment, featuring a strong non-linear phase noise limitation and regenerated using a phase preserving and power limiting function based on a photonic crystal nanocavity
3
Lin, Pei-Lung, and 林丕龍. "A Low-Cost High-Symbol-Rate Equalizer Chip for HIPERLAN System." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/59768310318801360628.
Abstract:
碩士國立中正大學
電機工程研究所
87
A low-cost high-symbol-rate equalizer for the receiver of a high-speed local area network that meets the ETSI HIPERLAN standard is proposed in this thesis. Although the HIPERLAN is a Slowly Time-varying Multipath Fading Channel system, the ISI (Inter-symbol Interference) will be very severe when the data rate up to 20Mbps. In this thesis, we select ADFE (Adaptive Decision Feedback Equalizer) to overcome the ISI problem. We adopt the sequential architecture to reduce the ADFE hardware cost. However, a ten times operation clock frequency comparing to the parallel ADFE is applied to the whole system. Therefore the high-speed multiplier and adder are necessary for this chip. In order to solve the problem of clock skew we also embed an ADPLL (All Digital Phase-Locked Loop) to boost the operation clock frequency.
4
Birenjith, P. S. "High-rate MSR Codes, Interior-point Regenerating Codes, and Codes with Hierarchical Locality." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/4293.
Abstract:
Given the breath-taking pace at which the amount of data being generated on a daily basis is growing,
and the keen desire to extract information from this data, there is strong interest within the storage
industry, at finding means to efficiently and reliably store this data. Given that individual storage units
are prone to failure, data pertaining to a single _le is distributed across storage nodes. Such storage
of `Big Data' across a spatially distributed network of nodes, calls for codes than can efficiently handle
the issue of node repair. The need for node repair could arise on account of device failure, need for
a maintenance reboot, or simply because the node is busy serving other demands. A new branch of
coding theory has sprung up in response. Regenerating codes minimize data download during a repair
operation, while codes with locality ensure that local operations suffice for node repair. The present
thesis makes contributions to both regenerating codes as well as codes with locality.
While the reliable storage of data in disks with minimum storage overhead is a well-studied problem,
the problem of node repair is relatively new. From the viewpoint of the storage industry, the cost to
repair a failed node can be measured in two distinct ways: firstly, in terms of the number of surviving
nodes accessed, and secondly, in terms of the amount of data transmitted over the network to ensure
repair of the failed node.
In a regenerating code having parameter set (n; k; d; (_; _);B), and over a _finite _field Fq, a file
consisting of B symbols from Fq is encoded into n_ symbols, and the coded symbols are stored in n
distinct nodes, each node storing _ symbols. The parameter _ is referred to as sub-packetization level.
The entire _le can be recovered from downloading k_ symbols from any set of k nodes. Under the
exact-repair (ER) setting that is of interest here, the contents of a failed node are repaired exactly
from a total of d_ symbols downloaded from any d helper nodes, each helper node transmitting _
symbols. In the alternative setting of functional repair (FR), the contents of the replacement node can
be different from that of the failed node, however, following node repair, the new configuration is still
required to satisfy the data-recovery and node repair properties of a regenerating code. Under the FR
setting, there is a trade-off known as storage-repair-bandwidth (S-RB) trade-off between the values of
_ and d_, that optimize the size of the _le being stored. The two extreme points of the trade-off, one
corresponding to the minimum possible value of _ and the other, to the minimum possible value of d_,
are known as the minimum-storage-regenerating (MSR) and minimum-bandwidth-regenerating (MBR)
points respectively. It has been shown that the extreme points of the ER trade-off coincide with those
of the FR trade-off. However, the characterization of trade-off in the case of ER remains an open and
challenging problem.
High-rate MSR code constructions the _first problem reported in the thesis, is one of designing
exact-repair MSR codes that possess certain additional desirable properties, namely, high rate (i.e., rate
greater than half) and a small value of sub-packetization level _. In the present thesis, we construct a
family of MSR codes for d = (n 1) having a fixed rational rate R = (t 1)=t and a sub-packetization
that is polynomial in k for a fixed rate. In the construction, _ varies with k as _ = O(kt). This was the
first high-rate MSR code construction to have such small value of sub-packetization.
Canonical codes: Regenerating codes for the interior points of the S-RB trade-off the next
pair of results relate to the construction of interior-point regenerating codes. For the parameter set
(n; k; d = k), we first construct as our second result, a class of codes referred to as canonical codes,
having an auxiliary parameter w, with w in the range nk < w < k, these codes operate in the region
between the MSR point and the MBR point, and perform significantly better than operating points
obtained through space-sharing. The canonical code constructed for the case (n; k = n 1; d = n 1),
turn out to achieve an interior point of the FR trade-off, thus characterizing for the first time, an interior
point of the ER trade-off.
Generalized Canonical codes We next build on top of a canonical code having parameters (n; d; d)
and construct codes corresponding to a more general parameter set of the form (n; k < d; d) using
two different approaches. In the first approach, leading to what we refer to as non-canonical codes, an
exponential expansion in field size is needed while the parameters _ and _ remain the same as in the
case of the (n; d; d) code. In the second approach, the value of _ is increased from that of the (n; d; d)
code, but no expansion in field size is needed. The resultant codes are referred to as improved layered
codes. Both approaches lead to codes that perform much better than the space-sharing line.
Outer bounds on the storage-repair-bandwidth trade-off the next set of results presented here
take on the form of two distinct outer bounds for the S-RB trade-off. The first is referred to here as
the repair-matrix bound and the second as the improved Muhajir-Tandon bound. The repair-matrix
bound lies strictly away from the FR trade-off for every parameter (n; k; d), and thus proves that the
ER trade-off is bounded away from the FR trade-off, even when the _le size grows to infinity. This result
solved an open problem in the literature. In conjunction with the improved layered codes constructed
in the thesis and described above, these outer bounds characterize the ER trade-off for the case when
(n; k = 3; d = n 1). This is the first family of parameters for which the ER trade-off is characterized.
Furthermore, for the parameter set (n; k = 4; d = n 1), the operating point of the improved layered
code coincides with the outer bound, characterizing yet another interior point of the S-RB trade-off.
Codes with hierarchical locality the final set of results relate to the second class of codes developed
for efficient node repair, namely, codes with locality. The aim of this class of codes is to reduce the
number of nodes accessed while repairing a failed node. In a code with locality having locality parameter
r, every symbol can be repaired by accessing r other symbols, where r is typically, much smaller than the
dimension k of the code. We introduce in the thesis the notion of hierarchical locality, where the local
codes are of varying locality and possess a hierarchical structure. In the case of two-level hierarchical
locality, for instance, every symbol is protected both by an inner, short-block-length local code, as well
as a middle code of larger block length. The code symbols in the inner code are a subset of the code
symbols in the middle code. We first present the case of codes with two-level hierarchy, derive an upper
bound on the minimum distance and provide optimal code constructions for a wide parameter range.
The minimum-distance bound, and code construction are then generalized for the case of a hierarchical
structure having an arbitrary number of levels.
5
Chou, Fu-Heng, and 周孚衡. "A Study of Graphical Symbol Recognition Rate and Analysis of Error and Confusion by Using Taoyuan Metro and Taiwan High Speed Railways for Examples." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/j4b3jq.
Abstract:
碩士國立交通大學
工業工程與管理系所
105
The study is focus on graphical symbol of Taiwan Railways and Taoyuan Metro. Use “Comprehension test” of ISO for method and analyze these graphical symbols’ comprehension rate which are not derived from international symbol organization. And analyze international graphical symbol which are same meaning but different graphics. For those graphical symbol don’t reach the 67% comprehension rate, this paper will give a full study and improved advices. The study shows that there are 14 graphical symbols don’t reach the standard (ATM, Money exchange, Car-parking, Shop, Meeting room, Bicycle rent, Taipei metro, Automatic ticket machine, Travel service counter, Meeting point, Restroom for parents with infants, Temporary transfer area, Police, Ticket gate).6 graphical symbols are recommend to use ISO’s or AIGA’s instead, and other 8 graphical symbols will be given full analysis with volunteer’s feedback. This study will classify these graphical symbols into two groups, one is “design property” and the other is “unique property”. After study we figure out that two classes are not significant different, but these two classes still have 14% different at comprehension rate. This study gives three conclusions, first is ”comprehension rate of graphical symbol is moderate positive correlation with familiarity”, which is proofed by other studies. Second is “average comprehension rate of graphical symbol in Taiwan don’t reach standard”, shows that there’s still large room for improvement. The last conclusion is “Unique graphical symbol for some area is still accepted” , but need to be tested to check if the unique graphical symbol meet the standard rate.
Book chapters on the topic "High symbol rate transmissions":
1
Walrand, Jean. "Multiplexing: A." In Probability in Electrical Engineering and Computer Science, 39–58. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-49995-2_3.
Abstract:
AbstractThis chapter explores the fluctuations of random variables away from their mean value. You flip a fair coin 100 times. How likely is it that you get 60 heads? Conversely, if you get 60 heads, how likely is it that the coin is fair? Such questions are fundamental in extracting information from data.In Sect. 3.1, we start by exploring the rate available to a user when a random number of them share a link, as illustrated in Sect. 3.1. Such calculations are central to network provisioning. The main analytical tool is the Central Limit Theorem explained in Sect. 3.2 where Gaussian random variables are also introduced and confidence intervals are defined. To share a common link, devices may be attached to a switch. For instance, the desktop computers in a building are typically connected to a switch that then sends the data to a common high-speed link. We explore the delays that packets face through the buffer of a switch in Sect. 3.3. The analysis uses a Markov chain model of the buffer. To share a wireless radio channel, devices use a multiple access protocol that regulates the transmissions. We study such schemes in Sect. 3.4. We use probabilistic models of the protocols.
2
Gulati, Ashok, Ranjana Roy, and Siraj Hussain. "Performance of Agriculture in Punjab." In India Studies in Business and Economics, 77–112. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9335-2_4.
Abstract:
AbstractPunjab had been a star performer in agriculture during the heydays of the green revolution. Its agricultural GDP grew at 5.7% per annum during the period from 1971–72 to 1985–86, which was more than double the growth rate of 2.31% achieved at all-India level in the same period. It was Punjab’s spectacular performance, first observed in large wheat surpluses and then in rice, that helped India free itself from food aid under the PL 480 and its associated political strings. Punjab became a symbol of India’s grain surpluses, giving India much needed food security. But after 1985–86, the green revolution showed signs of waning and Punjab’s agricultural growth slowed to 3% per annum over the period 1985–86 to 2004–05, almost the same as achieved at the all-India level. But the real challenges to Punjab’s agriculture emerged when its growth crashed to just 1.6% per annum during 2005–06 to 2016–17, which was less than half the all-India agricultural GDP growth of 3.6% over the same period. Owing to the earlier years of high agricultural growth, Punjab had one of the lowest poverty ratios (7.7% in rural Punjab) as per Tendulkar poverty line in the country in 2011–12, which was almost one-third the level of poverty at the all-India level. Providing food security to the country and reducing its own poverty to the lowest levels within India has been Punjab’s most laudable achievements.
3
El-said, Shaimaa A., Khalid F. A. Hussein, and Mohamed M. Fouad. "Image Compression Technique for Low Bit Rate Transmission." In Intelligent Computer Vision and Image Processing, 211–29. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-3906-5.ch015.
Abstract:
A novel Adaptive Lossy Image Compression (ALIC) technique is proposed to achieve high compression ratio by reducing the number of source symbols through the application of an efficient technique. The proposed algorithm is based on processing the discrete cosine transform (DCT) of the image to extract the highest energy coefficients in addition to applying one of the novel quantization schemes proposed in the present work. This method is straightforward and simple. It does not need complicated calculation; therefore the hardware implementation is easy to attach. Experimental comparisons are carried out to compare the performance of the proposed technique with those of other standard techniques such as the JPEG. The experimental results show that the proposed compression technique achieves high compression ratio with higher peak signal to noise ratio than that of JPEG at low bit rate without the visual degradation that appears in case of JPEG.
4
Assanovich, Boris, Iryna Korlyukova, and Andrei Khombak. "Information Encoding for Flow Watermarking and Binding Keys to Biometric Data." In Coding Theory Essentials [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.110202.
Abstract:
Due to the current level of telecommunications development, fifth-generation (5G) communication systems are expected to provide higher data rates, lower latency, and improved scalability. To ensure the security and reliability of data traffic generated from wireless sources, 5G networks must be designed to support security protocols and reliable communication applications. The operations of coding and processing of information during the transmission of both binary and non-binary data in nonstandard communication channels are described. A subclass of linear binary codes is considered, which are both Varshamov-Tenengolz codes and are used for channels with insertions and deletions of symbols. The use of these codes is compared with Hidden Markov Model (HMM)-based systems for detecting intrusions in networks using flow watermarking, which provide high true positive rate in both cases. The principles of using Bose-Chadhuri-Hocquenhgem (BCH) codes, non-binary Reed-Solomon codes, and turbo codes, as well as concatenated code structures to ensure noise immunity when reproducing information in Helper-Data Systems are considered. Examples of biometric systems organization based on the use of these codes, operating on the basis of the Fuzzy Commitment Scheme (FCS) and providing FRR < 1% for authentication, are given.
5
Chen, Sheng. "Adaptive Beamforming Assisted ReceiverAdaptive Beamforming." In Handbook on Advancements in Smart Antenna Technologies for Wireless Networks, 60–81. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-988-5.ch003.
Abstract:
Adaptive beamforming is capable of separating user signals transmitted on the same carrier frequency, and thus provides a practical means of supporting multiusers in a space-division multiple-access scenario. Moreover, for the sake of further improving the achievable bandwidth efficiency, high-throughput quadrature amplitude modulation (QAM) schemes have become popular in numerous wireless network standards, notably, in the recent WiMax standard. This contribution focuses on the design of adaptive beamforming assisted detection for the employment in multiple-antenna aided multiuser systems that employ the high-order QAM signalling. Traditionally, the minimum mean square error (MMSE) design is regarded as the state-of-the-art for adaptive beamforming assisted receiver. However, the recent work (Chen et al., 2006) proposed a novel minimum symbol error rate (MSER) design for the beamforming assisted receiver, and it was demonstrated that this MSER design provides significant performance enhancement, in terms of achievable symbol error rate, over the standard MMSE design. This MSER beamforming design is developed fully in this contribution. In particular, an adaptive implementation of the MSER beamforming solution, referred to as the least symbol error rate algorithm, is investigated extensively. The proposed adaptive MSER beamforming scheme is evaluated in simulation, in comparison with the adaptive MMSE beamforming benchmark.
6
Porterfield, Amanda. "The Rise and Fall of Female Piety as a Symbol of New England." In Female Piety in Puritan New England, 116–53. Oxford University PressNew York, NY, 1991. http://dx.doi.org/10.1093/oso/9780195068214.003.0005.
Abstract:
Abstract After 1660, the Puritan ideal of female piety acquired political signifi¬cance as a symbol of the strength and virtue of New England society. This development not only reflected the long-standing idealization of female piety in Puritan sermons, but also the growing preponderance of women church members, and the increasing religious authority Puritan women exercised at home as a result of their high rate of church membership. Thus the Puritan ideal of female sanctity came to symbolize the integrity of Puritan culture in New England as women came increasingly to represent religious virtue within Puritan culture.
7
Rowe, Neil C. "Critical Issues in Content Repurposing for Small Devices." In Encyclopedia of Multimedia Technology and Networking, Second Edition, 293–98. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-014-1.ch040.
Abstract:
Content repurposing is the reorganizing of data for presentation on different display hardware (Singh, 2004). It has been particularly important recently with the growth of handheld devices such as “personal digital assistants” (PDAs), sophisticated telephones, and other small specialized devices. Unfortunately, such devices pose serious problems for multimedia delivery. With their small screens (240 by 320 for a basic Palm PDA), one cannot display much information (like most of a Web page); with their low bandwidths, one cannot display video and audio transmissions from a server (“streaming”) with much quality; and with their small storage capabilities, large media files cannot be stored for later playback. Furthermore, new devices and old ones with new characteristics have been appearing at a high rate, so software vendors are having difficulty keeping pace. So some real-time, systematic, and automated planning could be helpful in figuring how to show desired data, especially multimedia, on a broad range of devices.
8
Kanchana Devi A and Bhuvaneswari B. "Investigation and Suppression of RF Leakage Power in Front End Wireless Devices." In Advances in Parallel Computing. IOS Press, 2021. http://dx.doi.org/10.3233/apc210081.
Abstract:
In this modern Communication Wireless System, Frequency Division Duplex (FDD) is mostly used. Duplex is a device to separate Transmitter and Receiver signals. Transmitter or Power leakage causes from limited isolation performance of the duplexer. Various Techniques of Modulation using Orthogonal Frequency Division Multiplexing (OFDM) provided better solution to cancel this leakage. The OFDM provides high spectral efficiency, lower multi-path distortion and to eliminate inter symbol interference (ISI). Fast Fourier Transform implemented modulation and demodulation functions more efficiently. Using simulation result of the various parameters are analysed. In addition, Comparison of the table between Bit rate error value, Signal strength throughput, Power consumption and Mean square error values obtained in the OFDM systems.
9
Harpaz, Yossi. "Israel." In Citizenship 2.0, 97–125. Princeton University Press, 2019. http://dx.doi.org/10.23943/princeton/9780691194066.003.0005.
Abstract:
This chapter analyzes EU citizenship in Israel. Israel's high income level and low emigration rate set it apart from Serbia and Mexico and make dual citizenship less obviously useful. EU–Israeli dual citizens rarely refer to themselves as dual citizens, but instead see themselves as “Israelis with a European passport.” The chapter then demonstrates that citizenship applicants are mainly driven by two motivations that were conditioned by Jewish history. The first is the wish to hold an insurance policy against the possibility of Israel being destroyed. The second is the desire for a status symbol that signifies their elitist position in Israel as European-origin Jews. Ironically, the grandchildren of Jews who had left Europe for Israel now look to German or Hungarian passports for security.
10
Vasudevan, Kasturi, Surendra Kota, Lov Kumar, and Himanshu Bhusan Mishra. "New Results on Single User Massive MIMO." In MIMO Communications - Fundamental Theory, Propagation Channels, and Antenna Systems [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.112469.
Abstract:
Achieving high bit rates is the main goal of wireless technologies like 5G and beyond. This translates to obtaining high spectral efficiencies using large number of antennas at the transmitter and receiver (single user massive multiple input multiple output or SU-MMIMO). It is possible to have a large number of antennas in the mobile handset at mm-wave frequencies in the range 30–300 GHz due to the small antenna size. In this work, we investigate the bit-error-rate (BER) performance of SU-MMIMO in two scenarios (a) using serially concatenated turbo code (SCTC) in uncorrelated channel and (b) parallel concatenated turbo code (PCTC) in correlated channel. Computer simulation results indicate that the BER is quite insensitive to re-transmissions and wide variations in the number of transmit and receive antennas. Moreover, we have obtained a BER of 10−5 at an average signal-to-interference plus noise ratio (SINR) per bit of just 1.25 dB with 512 transmit and receive antennas (512 × 512 SU-MMIMO system) with a spectral efficiency of 256 bits/transmission or 256 bits/sec/Hz in an uncorrelated channel. Similar BER results have been obtained for SU-MMIMO using PCTC in correlated channel. A semi-analytic approach to estimating the BER of a turbo code has been derived.
Conference papers on the topic "High symbol rate transmissions":
1
Gunning, F. C. Garcia, S. K. Ibrahim, P. Frascella, P. Gunning, and A. D. Ellis. "High Symbol Rate OFDM Transmission Technologies." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/ofc.2010.othd1.
2
Maher, Robert. "Signal Processing for High Symbol Rate Transmission: Challenges and Opportunities." In Signal Processing in Photonic Communications. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/sppcom.2018.spw3g.2.
3
Hamaoka, Fukutaro. "Ultra-wideband Transmission and High-symbol Rate Signal Handling Technologies." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2020. http://dx.doi.org/10.1364/ofc.2020.w3e.1.
4
Raybon, Greg. "High Symbol Rate Transmission Systems for Data Rates from 400 Gb/s to 1Tb/s." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2015. http://dx.doi.org/10.1364/ofc.2015.m3g.1.
5
Nakamura, Masanori, Fukutaro Hamaoka, Takayuki Kobayashi, Hiroshi Yamazaki, Munehiko Nagatani, Yoshihiro Ogiso, Hitoshi Wakita, and Yutaka Miyamoto. "High Symbol-Rate Signal Optimization for Long-Haul Transmission Systems over 1-Tbps/λ Net-Data Rate." In 2021 European Conference on Optical Communication (ECOC). IEEE, 2021. http://dx.doi.org/10.1109/ecoc52684.2021.9605864.
6
Raybon, G., S. Randel, A. Adamiecki, and P. J. Winzer. "High symbol rate transmission systems for data rates above 400 Gb/s using ETDM transmitters and receivers." In 2014 European Conference on Optical Communication (ECOC). IEEE, 2014. http://dx.doi.org/10.1109/ecoc.2014.6964240.
7
Rafique, Danish. "Interplay of Pulse Shaping and Pre-Emphasis for High Symbol Rate Coherent Transmission Systems." In 2018 20th International Conference on Transparent Optical Networks (ICTON). IEEE, 2018. http://dx.doi.org/10.1109/icton.2018.8473908.
8
Weerasinghe, Amanda, Muataz Alhussein, He Li, Adrian Wonfor, and Richard Penty. "Practical high-speed Gaussian coherent state continuous variable quantum key distribution with real-time parameter monitoring and post-processed key distillation." In Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ofc.2023.m2i.3.
Abstract:
We demonstrate Gaussian modulated continuous variable quantum key distribution at 50MHz symbol rate. Unlike most demonstrations, we record received signals in real-time and distil keys, producing a record 3Mb/s key rate after 25km transmission.
9
Raybon, G., A. Adamiecki, and J. Cho. "High Symbol Rate, Single Carrier, Coherent Optical Transmission Systems for Data Rates from 400 Gb/s to 1.0-Tb/s." In Photonic Networks and Devices. Washington, D.C.: OSA, 2016. http://dx.doi.org/10.1364/networks.2016.nem4b.2.
10
Kobayashi, T., M. Nakamura, F. Hamaoka, M. Nagatani, H. Yamazaki, H. Nosaka, and Y. Miyamoto. "Long-haul WDM transmission with over-1-Tb/s channels using electrically synthesized high-symbol-rate signals." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2020. http://dx.doi.org/10.1364/ofc.2020.m4k.1.