Filters








175 Hits in 6.3 sec

A Hybrid PAPR Reduction Scheme for Optical Wireless OFDM Communication Systems

2018 KSII Transactions on Internet and Information Systems  
The performance of hybrid scheme has been evaluated and compared with the original OFDM based VLC system, conventional PTS and clipping methods.  ...  This paper proposes a new hybrid scheme to decrease the high peak to average power ratio (PAPR) of optical orthogonal frequency division multiplexing (OFDM) signals in visible light communication (VLC)  ...  A semi-blind error resilient SLM scheme is proposed in [16] to allow error detection and correction in the side information index by utilizing the spread spectrum codes for embedding the side information  ... 
doi:10.3837/tiis.2018.03.009 fatcat:q5ncx3j6i5corej7ccwpodmfqi

Behavior and Techniques for Improving Performance of OFDM Systems for Wireless communications
IJARCCE - Computer and Communication Engineering

Alcardo Alex Barakabitze, Md. Abbas Ali
2015 IJARCCE  
Finally, the paper provides a number of wireless communication standards and many of the applications where OFDM systems are used.  ...  This paper gives a total insight of various Peak -to Average Power Reduction (PAPR) techniques and principles of OFDM systems used in wireless communications.  ...  The OFDM based wireless communication system design includes the design of OFDM transmitter, and OFDM receiver.  ... 
doi:10.17148/ijarcce.2015.4152 fatcat:jhz6j5w5gjamrosklf4aj4ccda

Discrete Cosine Transform Matrix Based SLM Algorithm for OFDM with Diminished PAPR for M-PSK over Different Subcarriers

Prabal Gupta, Rajiv Kumar Singh, H. Pal Thethi, Balpreet Singh, Santosh Kumar Nanda
2019 Journal of Computer Networks and Communications  
In the proposed work, scheming of phase sequences are very informal due to the use of a DCT matrix which has a definite structure and can be generated at the receiver side with the help of side information  ...  of the phases and communicated from the transmitter to the receiver.  ...  In this method, the authors have embedded phases which reduce the PAPR of information blocks of coded OFDM.  ... 
doi:10.1155/2019/2893207 fatcat:cvrhyodqqbgdjhi3lhmfgircnu

Zero-Padding Techniques in OFDM Systems

Yasir Amer Al-Jawhar, Khairun Nidzam Ramli, Montadar Abas Taher, Nor Shahida Mohd Shah, Lukman Audah, Mustafa Sami Ahmed
2018 International Journal on Electrical Engineering and Informatics  
His research interests mainly focus on signal processing in communication, OFDM, PAPR reduction in Multicarrier system, 5G waveform design, and wireless network.  ...  Although the OFDM system has been gaining importance in recent years, the high peak to average power ratio is considered the main limitation of the system.  ...  Zero-Padding Techniques in OFDM Systems On the other hand, there are three common kinds of the subblock partitioning schemes have been adopted; pseudo-random scheme (PR-PTS), adjacent scheme (AD-PTS),  ... 
doi:10.15676/ijeei.2018.10.4.6 fatcat:m7lmcxzvkre2petr26qrk3tsty

An Overview of Peak-to-Average Power Ratio Reduction Techniques for OFDM Signals

Zhuo Wang, Enchang Sun, Yanhua Zhang
2016 International Journal of Mobile Network Communications & Telematics  
One of the issues is the high PAPR (peak-toaverage power ratio), which results in nonlinearity in power amplifiers, and causes out of band radiation and in band distortion.  ...  However, some challenging issues are still unresolved in OFDM systems.  ...  ACKNOWLEDGMENTS This work was financially supported by the National Natural Science Foundation of China under Grant 61372089 and 61571021, the Science and Technology Development Project of Beijing Municipal  ... 
doi:10.5121/ijmnct.2016.6301 fatcat:h33yr4hsdvdiraojdvxyj7iyjm

A Distributed Polarizing Transmission System for Frequency Selective Fading Channels

Tinuola Olayinka Coker
2013 IOSR Journal of Computer Engineering  
while transmitting information symbols in a source-relay-destination MIMO-OFDM relay communication system.  ...  While a key component relay design is to optimize the precoding of source and relay in benefits of multiple antennas and multiple OFDM symbols, how to design the MIMO-OFDM relay system to achieve high  ...  design the polar system for the transmission of the signal vector x, in which we switch to the polar system in four consecutive time slots, i.e., downpolarizing and up-polarizing communications in turn  ... 
doi:10.9790/0661-08585105 fatcat:hx2tjqibira3jirf6lqsz2bha4

The PAPR Problem in OFDM Transmission: New Directions for a Long-Lasting Problem

Gerhard Wunder, Robert F.H. Fischer, Holger Boche, Simon Litsyn, Jong-Seon No
2013 IEEE Signal Processing Magazine  
However, industry and academia are confronted with new challenges regarding energy efficient system design.  ...  Peak power control for multicarrier communications has been a long-lasting problem in signal processing and communications.  ...  Another main problem so far is that side information is treated separately and not within the same communication model. A better model is complete partitioning of the set of transmit sequences.  ... 
doi:10.1109/msp.2012.2218138 fatcat:npuit6keifhzzgc6q43eqaco2y

Neutrosophic data formation using Gaussian filter based costas coding for wireless communication systems

A.S. Ajith, T. Latha
2019 Zenodo  
Outstanding advantages of OFDM helps high data rate communication systems such as Digital Video Broadcasting (DVB) and mobile worldwide interoperability for microwave access (mobile Wi-MAX).  ...  But, OFDM system grieves from grave issue of high PAPR.  ...  Yet the direction of the chirp, which is embedded in the sign of k, will not affect the analysis.  ... 
doi:10.5281/zenodo.3077232 fatcat:tvethqigzrcw7mkfrmspbzp2yy

Improving the Performance of OFDM and Reduce PAPR Using Trigonometric Transform
english

Kolkure V.S., Manure V.M, Vidhate A.D
2014 International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering  
Trigonometric transforms are used in this scheme for improving the performance of the OFDM systems and reducing the Peakto-Average Power Ratio (PAPR) of OFDM signal.  ...  In the proposed scheme the transmit data sequence of the OFDM signal after Inverse Fast Fourier Transform (IFFT) is grouped into in-phase and in-quadrature components, then each component is transformed  ...  Compared with the means of SLM-OFDM and PTS-OFDM, OFDM system modified by DCT/DST maintain the system orthogonal properties, which will not result in additional noise and need not transmit side information  ... 
doi:10.15662/ijareeie.2014.0312007 fatcat:4yixk7yfvjdjrpxie2rzyfhpoy

Contents

2016 Procedia Computer Science  
of Communication Systems Applications of Fixator-norator Pair in Companion Model Based Designs R.  ...  Architecture and ICT Image and Video Processing Optical Systems and Networks Analysis of WDM System with Dispersion Compensation Schemes P.  ... 
doi:10.1016/s1877-0509(16)31840-3 fatcat:ric233vambduriwrh5vkcimjk4

A New Blind SLM Scheme With Low Decoding Complexity for OFDM Systems

Hyun-Seung Joo, Seok-Joong Heo, Hyun-Bae Jeon, Jong-Seon No, Dong-Joon Shin
2012 IEEE transactions on broadcasting  
Finally, it is shown that for QPSK and 16-QAM, the detection failure probability and the BER of the proposed BSLM scheme are almost the same as those of the conventional BSLM scheme through numerical analysis  ...  In this paper, a new blind selected mapping (BSLM) scheme is proposed for orthogonal frequency division multiplexing systems.  ...  In order to analyse the BER performance of communication systems with coding schemes such as trellis codes and space-time codes, the PEP analysis is widely performed.  ... 
doi:10.1109/tbc.2012.2216472 fatcat:abyb53v7nfgadltnzvfwejncse

Neutrosophic data formation using Gaussian filter based costas coding for wireless communication systems

A.S. Ajith, T. Latha
2019 Cognitive Systems Research  
But, OFDM system grieves from grave issue of high PAPR. In OFDM system data output is superposition of multiple sub-carriers and leads to big data.  ...  Outstanding advantages of OFDM helps high data rate communication systems such as Digital Video Broadcasting (DVB) and mobile worldwide interoperability for microwave access (mobile Wi-MAX).  ...  Yet the direction of the chirp, which is embedded in the sign of k, will not affect the analysis.  ... 
doi:10.1016/j.cogsys.2018.09.030 fatcat:veko4trfznc2zcqlmw7a2rx6pm

PAPR Performance Analysis of low Complexity SLM for Various Phase Sequences in MIMO-OFDM System

2019 International journal of recent technology and engineering  
Selective Mapping (SLM) significantly reduces the PAPR in OFDM systems at the cost of computational complexity (CC). The CC of SLM can be reduced by proper design of SLM.  ...  The PAPR of an SLM-OFDM depends on the number of subcarriers in OFDM, the number of candidate blocks in SLM and selected phase sequence and this paper investigate various phase sequences and analyses their  ...  [14] stated that for same side information length, SLM is better than PTS. C. L. Wang et al.  ... 
doi:10.35940/ijrte.b2908.078219 fatcat:acfod3j7gvarxjfbjoieqdzbii

Peak-To–Average Power Ratio Reduction of Ofdm Siganls

Ms. Nilofer SK
2012 IOSR Journal of Electronics and Communication Engineering  
In this project partial transmit (PTS) scheme along with the threshold technique has been simulated using Matlab and the simulation results shows that the technique performs better.  ...  Frequencies of occurrence of congestion in the network were derived from the teletraffic data using the Nigerian Communications Commission (NCC) benchmark.  ...  The authors would like to thank the review committee members. We also thank Mr. Shivakumarappa. B. S. for all kind of co-operations extended in bringing out this paper.  ... 
doi:10.9790/2834-0320105 fatcat:h2zvjidzgfgf7bhywbxfwqwl4u

Radio Resource Management in Joint Radar and Communication: A Comprehensive Survey [article]

Nguyen Cong Luong, Xiao Lu, Dinh Thai Hoang, Dusit Niyato, Dong In Kim
2021 arXiv   pre-print
In particular, sharing the spectrum imposes the interference caused by the systems, and sharing the hardware platform and energy resource complicates the design of the JRC transmitter and compromises the  ...  First, we give fundamental concepts of JRC, important performance metrics used in JRC systems, and applications of the JRC systems.  ...  CRC systems From the perspective of the availability of system information, the designs of CRC systems can be classified into three types: non-cooperative, cooperative and co-designed.  ... 
arXiv:2007.13146v3 fatcat:aq5ti5uruvgczpfcrtulcfehf4
« Previous Showing results 1 — 15 out of 175 results