Showing 1-25 of 8,597 resultsfor "Index Terms":Partial Sequences
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The Research on the Analysis of Image Sequence Model
2009 International Conference on Computer and Communications Security
Year: 2009 | Conference Paper |
Multiple Sequence Assembly from Reads Alignable to a Common Reference Genome
We describe a set of computational problems motivated by certain analysis tasks in genome resequencing. These are assembly problems for which multiple distinct sequences must be assembled, but where the relative positions of reads to be assembled are already known. This information is obtained from a common reference genome and is characteristic of resequencing experiments. The simplest variant of...Show More
Comparative analysis of peak-to-average power ratio (PAPR) reduction techniques for OFDM system
2013 4th International Conference on Computer and Communication Technology (ICCCT)
Year: 2013 | Conference Paper |
Cited by: Papers (3)
Orthogonal Frequency Division Multiplexing (OFDM) is a spectrally efficient multicarrier modulation technique for high-speed data transmission over multipath fading channels. However, it has some limitations such as the Peak-to-average power ratio (PAPR), which restricts its use. It reduces the efficiency of the system. The aim of this paper is to analyze and compare various PAPR reduction techniq...Show More
Hybrid scheme for PAPR reduction technique in WiMAX OFDMA
The 17th Asia Pacific Conference on Communications
Year: 2011 | Conference Paper |
Fourth generation (4G) wireless technology are expected to be based on worldwide interoperability for microwave access (WiMAX) systems. However, high peak to average power ratio (PAPR), a main drawback in mobile WiMAX using orthogonal frequency division multiplexing (OFDM), are solved in some solutions for many years. Especially, such wireless systems with large number of sub-carriers lead to unde...Show More
Semi-weighting PTS PAPR reduction method in OFDM systems by Modified Cuckoo Search algorithm
2017 International Conference on Wireless Communications, Signal Processing and Networking (WiSPNET)
Year: 2017 | Conference Paper |
In current scenario, to improve the performance of Orthogonal Frequency Division Multiplexing (OFDM) signals, numerous techniques are implemented. In that, Partial Transmit Sequence (PTS) shows a superior reduction and improvement compared to other approaches. This study focus on enhancing the enactment of PTS method with the advantage of Modified Cuckoo Search (M-CS) algorithm and Semi Weighted-P...Show More
Chaos-Based Partial Transmit Sequence Technique for Physical Layer Security in OFDM-PON
Xiaonan Hu;Xuelin Yang;Zanwei Shen;Hao He;Weisheng Hu;Chenglin Bai
IEEE Photonics Technology Letters
Cited by: Papers (84)
We propose and demonstrate a physical layer security scheme via chaotic partial transmit sequence (PTS) technique in orthogonal frequency-division multiplexing passive optical network (OFDM-PON). A 4-D hyper chaos is employed to generate the chaotic partition information, the chaotic phase weighing factors in PTS as well as the chaotic training sequence for OFDM symbol synchronization, which provi...Show More
Observations of echo phenomena acquired from partial discharge measurements in voids
2016 IEEE International Conference on High Voltage Engineering and Application (ICHVE)
Year: 2016 | Conference Paper |
Cited by: Papers (2)
In this paper, a new observation relating to partial discharge is presented, called partial discharge echo. Partial discharge echo refers to the occurrence of partial discharges in the part of the chopped sequence where no voltage is applied, following exposure of the specimen to a sinusoidal voltage above the partial discharge inception level. The phenomena relates to several aspects of the chopp...Show More
A Partial Least Squares Based Procedure for Upstream Sequence Classification in Prokaryotes
The upstream region of coding genes is important for several reasons, for instance locating transcription factor, binding sites, and start site initiation in genomic DNA. Motivated by a recently conducted study, where multivariate approach was successfully applied to coding sequence modeling, we have introduced a partial least squares (PLS) based procedure for the classification of true upstream p...Show More
Corona pulse sequence analysis at DC voltage
2016 17th International Scientific Conference on Electric Power Engineering (EPE)
Year: 2016 | Conference Paper |
Cited by: Papers (2)
The high voltage diagnostics must follow the actual state of the industry devices and the problems related to diagnostics methods. One of the diagnostic methods necessary to be solved at this time is the partial discharge detection, diagnostics and analyses in HVDC systems. There is no standardized method for detection of partial discharges in HVDC systems supplied with DC voltage. The presented s...Show More
On the Shift Value Set of Cyclic Shifted Sequences for PAPR Reduction in OFDM Systems
IEEE Transactions on Broadcasting
Cited by: Papers (32)
Orthogonal frequency division multiplexing (OFDM) signals have high peak-to-average power ratio (PAPR), which causes distortion when OFDM signal passes through a nonlinear high power amplifier. A partial transmit sequence (PTS) scheme is one of the typical PAPR reduction methods. A cyclic shifted sequences (CSSs) scheme is evolved from the PTS scheme to improve the PAPR reduction performance, wher...Show More
Partial Discharge Pattern Recognition Based on Kolmogorov-Smirnov Cluster Analysis of Discharge Pulse Sequences
2022 9th International Conference on Condition Monitoring and Diagnosis (CMD)
Year: 2022 | Conference Paper |
Cited by: Papers (2)
Partial discharge (PD) detection is an important way to evaluate the insulation state of power equipment. The phase-resolved partial discharge (PRPD) pattern has too many fingerprint features and the spectrum will be blurred with noise under field conditions. This article starts from the perspective that can directly describe the microscopic nature of the random characteristics of PD and selects t...Show More
PAPR reduction of OFDM system using PTS method with different modulation techniques
2014 International Conference on Electronics and Communication Systems (ICECS)
Year: 2014 | Conference Paper |
Cited by: Papers (5)
Orthogonal Frequency Division Multiplexing (OFDM) is multicarrier transmission technique. It is also a strong contender for fourth generation cellular and land mobile radio systems. One of the major drawbacks with this system is high Peak-To-Average power ratio (PAPR) at the output of OFDM modulator. So the system requires High power amplifier with large dynamic range. Many PAPR reduction schemes ...Show More
Performance Analysis of Peak-to-Average Power Ratio (PAPR) Reduction Techniques in an OFDM System
2012 Third International Conference on Computer and Communication Technology
Year: 2012 | Conference Paper |
Cited by: Papers (4)
Orthogonal Frequency Division Multiplexing (OFDM) has been currently under intense research for wireless transmission due to its robustness against multipath fading. However, it has some limitations such as the Peak-to-average power ratio (PAPR), which restricts its use. It reduces the efficiency of the system. The aim of this paper is to analyze the various PAPR reduction techniques.Show More
Performance improvement of OFDM using hybrid PAPR reduction technique
N. Annamalai Gokkul;A. Ashok Kumar;S. Hemant Kumar;M. Ramakrishnan
2013 Fourth International Conference on Computing, Communications and Networking Technologies (ICCCNT)
Year: 2013 | Conference Paper |
Cited by: Papers (2)
One of the major concerns of Orthogonal Frequency Division Multiplexing (OFDM) systems are its high Peak to Average Power Ratio (PAPR) values. These high PAPR values result in serious degradation in performance when a non-linear power amplifier is employed. The Conventional Partial Transmit Sequence (C-PTS) technique is one of the highly efficient methods for PAPR reduction in OFDM systems. Unfort...Show More
In this paper, we introduce a new partial transmit sequence (PTS) orthogonal frequency division multiplexing (OFDM) scheme with low computational complexity. In the proposed scheme, 2/sup n/-point inverse fast Fourier transform (IFFT) is divided into two parts. An input symbol sequence is partially transformed using the first l stages of IFFT into an intermediate signal sequence and the intermedia...Show More
Localisation of single and multiple partial discharge sources based on sequence of arrival and levels of peak amplitude of acoustic emissions
Arnab Baug;Niladri Ray Choudhury;Riddhi Ghosh;Sovan Dalai;Biswendu Chatterjee
Partial Discharge (PD) is one of the most critical electrical phenomena affecting the life of electrical equipment. Repetitive PD can lead to gradual deterioration of the insulation, which may further lead to complete failure of the electrical insulation. Hence, detection and localization of PD inside electrical equipment is necessary for early detection of impending failure. Keeping this in mind,...Show More
Partial transmit sequence based PAPR reduction with GA and PSO optimization techniques
2017 International Conference on Innovations in Information, Embedded and Communication Systems (ICIIECS)
Year: 2017 | Conference Paper |
Cited by: Papers (4)
OFDM is a multi-carrier modulation technique. The major advantage of OFDM includes high data rate transmission, spectral efficiency, and good BER performance. But the major limitation of OFDM is its High Peak-to-Average Power Ratio (PAPR). High PAPR results in increased hardware complexity and also decrease in efficiency of RF amplifiers. One of the most efficient techniques to reduce PAPR is Part...Show More
OFDM PAPR Reduction by Partial Transmit Sequences and Simplified Clipping with Bounded Distortion
2008 18th International Conference Radioelektronika
Year: 2008 | Conference Paper |
This paper is focused in the domain of peak to average power ratio (PAPR) reduction of orthogonal frequency division multiplex (OFDM) signals. Combination of partial transmit sequences (PTS) and simplified clipping and filtering with bounded distortion (SCAFBD) is proposed. The first mentioned method is distortionless, but needs to transmit a side information in every OFDM symbol. The second metho...Show More
An Improved Partial Transmit Sequence Scheme for PAPR Reduction in FBMC/OQAM Systems
2021 International Wireless Communications and Mobile Computing (IWCMC)
Year: 2021 | Conference Paper |
Cited by: Papers (2)
The 5th generation mobile networks (5G) and their key technologies need to provide higher spectrum efficiency utilization and smooth integration of broadband and narrowband systems. Filter bank multi-carrier transmission with Offset Orthogonal Amplitude Modulation (FBMC-OQAM) has great advantages to achieve this goal by combating multipath effects and offering high-speed data rate in wireless chan...Show More
Power Saving Analysis of Peak to Average Power Ratio Reduction Technique in OFDM System using Hybrid Improved Partial Transmit Sequence dan Clipping Filtering Technique
2018 International Electronics Symposium on Engineering Technology and Applications (IES-ETA)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
Orthogonal Frequency Division Multiplexing (OFDM) is a rapid data transmission technique in wireless communication system. OFDM techniques can overcome multipath fading effect and Intersymbol Interference (ISI) phenomenon. However, the main problem in OFDM is high value of Peak to Average Power Ratio (PAPR) in transmission signal that causes inefficient power amplifiers, so it takes more power con...Show More
A survey on OFDM PAPR reduction techniques for 60 GHz wireless CMOS radio
2007 Australasian Telecommunication Networks and Applications Conference
Year: 2007 | Conference Paper |
Cited by: Patents (1)
Multi-giga-bit-per-second 60 GHz transceivers are being developed and implemented on CMOS. OFDM is being considered as the modulation scheme. High peak-to-average power ratio (PAPR) is a major problem for OFDM. This paper reviews and discusses the advantages and limitations of several important PAPR reduction techniques such as coding, partial transmit sequence, clipping, selective mapping, tone r...Show More
Proposal of PAPR reduction method for OFDM signal by optimized PTS combined with interleaving method
2015 IEEE China Summit and International Conference on Signal and Information Processing (ChinaSIP)
Year: 2015 | Conference Paper |
Peak-to-average power ratio (PAPR) reduction of OFDM signal has been a subject of intense research in the last decade. In this paper, we propose an undistorted PAPR reduction method for OFDM systems, which combines the Interleaving Method and a modified Partial Transmit Sequence (PTS) method with the new phase rotation. The computational complexity of Interleaving Method is lower, compared with PT...Show More
Modified Pulse Sequence Analysis for PD measurement at DC
Josef Pihera;Jaroslav Hornak;Lukáš Kupka;Eva Mïllerová;Rainer Haller
2018 IEEE 2nd International Conference on Dielectrics (ICD)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
The Partial Discharge Behavior at DC conditions is currently investigated worldwide to find out anappropriate method and/ or principle for quality testing of HVDC components. Due to the lack of knowledge concerns a lot of basic investigations is performed. These kind of investigations should be continued also for other arrangements like surface discharge and cavity discharge test sets.The paper de...Show More
Hardware Accelerator for Prediction of Exons
2006 International Conference of the IEEE Engineering in Medicine and Biology Society
Year: 2006 | Conference Paper |
Gene annotation is by nature a computationally intensive problem, as it needs to process huge data size of DNA sequences. This forces the need to look for alternate ways of implementing algorithms to predict exons. The paper presents an accelerator for indexing DNA sequences. The accelerator effectively exploits the 3-periodicity property exhibited by protein coding regions and indicates their pre...Show More
Statistical Alignment with a Sequence Evolution Model Allowing Rate Heterogeneity along the Sequence
We present a stochastic sequence evolution model to obtain alignments and estimate mutation rates between two homologous sequences. The model allows two possible evolutionary behaviors along a DNA sequence in order to determine conserved regions and take its heterogeneity into account. In our model, the sequence is divided into slow and fast evolution regions. The boundaries between these sections...Show More
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