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A polarity comparison timing synchronization estimation for MB-OFDM-based UWB systems

Xue Wang, Zhihong Qian, Yijun Wang
2012 EURASIP Journal on Wireless Communications and Networking  
The proposed estimator could carry out timing synchronization for MB-OFDM-based UWB systems and make the uniqueness of timing index for sure.  ...  We attempt to locate the start sample of frame sequences by calculating difference of the two cross-correlation functions, between received symbols, the successive received symbols, and predefined preamble  ...  Acknowledgements This study was supported by the National Natural Science Foundation of China (No. 61071073) and the Doctoral Fund of Ministry of Education of China (No. 20090061110043).  ... 
doi:10.1186/1687-1499-2012-169 fatcat:ye5lgvdhjzc2tl27dqal7jyu2u

Pilot-Aided Frame Synchronization in Optical OFDM Systems

Funmilayo B. Offiong, Sinan Sinanović, Wasiu O. Popoola
2020 Applied Sciences  
Thus, the synchronization algorithm leverages the mirror symmetric property of the pilot symbol within a frame to detect the start of the pilot signal at the receiver.  ...  The pilot symbol is allocated to odd indexed subcarriers only.  ...  The PA frame synchronization presented in this work is a correlation-based method that utilizes preamble called the pilot symbol.  ... 
doi:10.3390/app10114034 fatcat:xbfpt6yafvdnxhkbcrfcqfghym

Preamble-based Symbol Timing Estimation for Wireless OFDM Systems

Manik Gadhiok, Joseph R. Cavallaro
2007 Asilomar Conference on Signals, Systems and Computers. Conference Record  
The proposed method is based on the average magnitude difference function (AMDF).  ...  We also propose a preamble sequence based on Golomb sequence and compare its timing estimation performance with the IEEE 802.11a short-sequence.  ...  A timing estimation method proposed by Schmidl and Cox [2] estimates symbol timing offset using received signal correlation based on knowledge of the transmitted preamble signal.  ... 
doi:10.1109/acssc.2007.4487542 fatcat:ee2crgu3j5ayzjthcrgkoaxhhu

A Novel Synchronization Algorithm for MIMO-OFDM based Wireless Communication

Dhanush Bharadwaj J P, Prof. Venkteshappa, Prof. Vinod Kumar B. L.
2015 International Journal of Engineering Research and  
Unlike the conventional synchronization approaches, more number of preamble symbols are used to achieve accurate frame boundary.  ...  An algorithm has designed and modeled in MATLAB to calculate the frame boundary of MIMO-OFDM frames which has 16x20 antennas.  ...  value.  16 peak values are obtained based on each of the 16 locally stored preamble symbols.  ... 
doi:10.17577/ijertv4is050966 fatcat:haos3tgj45ah5o5ojehgzsizri

Design and implementation in USRP of a preamble-based synchronizer for OFDM systems [article]

Authors: José Herrera-Bustamante
2020 arXiv   pre-print
Such an implementation was performed in three stages: frame detection, comparing the autocorrelation output and the average power of the received signal; time synchronism, where the cross-correlation based  ...  We analyzed several synchronization algorithms based on the correlation of the preamble symbols through the implementation in Software-Defined Radio (SDR) using the Universal Software Radio Peripheral  ...  In all the schemes, the Cascaded Integrator-Comb (CIC) works as a moving average filter. In this paper, the implemented algorithms are based on the correlation of the preamble symbols.  ... 
arXiv:2008.12404v1 fatcat:ydj2id4bnraydps45gmp4xerfi

Synchronization Method Based on a New Constant Envelop Preamble for OFDM Systems

G. Ren, Y. Chang, H. Zhang, H. Zhang
2005 IEEE transactions on broadcasting  
The synchronization method using the available constant envelop preamble is analyzed, and a new preamble weighted by pseudo-noise sequence is proposed, with which a novel timing and frequency offset estimation  ...  By the proposed method, the accuracy of the timing offset estimator is significantly improved, and the estimate range of the frequency offset estimator is greatly enlarged with no loss in accuracy.  ...  ACKNOWLEDGMENT The authors would like to thank all the reviewers whose comments led to the great improvements of the paper.  ... 
doi:10.1109/tbc.2004.842520 fatcat:u7use3gmvndapdwsm3r2vmg2k4

Robust Symbol Timing Synchronization for OFDM Systems Using PN Sequence

A. M. Khan
2014 International Journal of Information and Electronics Engineering  
The proposed design preamble is based on the correlation property of Pseudo Noise (PN) codes.  ...  This paper presents the symbol timing synchronization for OFDM receivers using PN sequence of values 1 or -1.  ...  Mohd Azman Bin Zakariya received bachelor of electrical engineering from Universiti Teknologi Malaysia, and master of science in communications and signal processing, from University of Newcastle Upon  ... 
doi:10.7763/ijiee.2014.v4.439 fatcat:24bssokksjflzh3dx5kng4cmxy

New fast time synchronization method for MIMO-OFDM systems

Ali Beydoun, Hamze Alaeddine, Haidar elmokdad
2018 2018 11th IFIP Wireless and Mobile Networking Conference (WMNC)  
It is based on sending a synchronization preamble at the beginning of each OFDM frame that has the same length as an OFDM symbol.  ...  the number of sub-carriers for one OFDM symbol.  ... 
doi:10.23919/wmnc.2018.8480935 dblp:conf/mwcn/BeydounAE18 fatcat:inmja26wfnadpdjvzvjdmsig6a

Robust Timing Synchronization for Multicarrier Systems Based on RST Invariance

J. C. Manco-Vasquez, V. P. G. Jimenez, M. Julia Fernandez-Getino Garcia
2013 IEEE Communications Letters  
In this paper, a blind robust timing synchronization method, based on invariance properties and cyclostationarity, for multicarrier systems such as Orthogonal Frequency Division Multiplexing (OFDM) is  ...  It even surpasses the performance of most of non-blind (pilotaided) methods, while at the same time, it gets the advantages of energy and bandwidth saving of blind proposals.  ...  ACKNOWLEDGMENT The authors would like to thank the anonymous reviewers for their helpful comments that have improved the quality of the paper.  ... 
doi:10.1109/lcomm.2013.043013.122822 fatcat:7fd5w52ux5d5tjid6owj323dp4

Preamble-Based Symbol Timing Algorithms in OFDM Systems

Kemal Yağlı, Sultan Aldırmaz Çolak
2022 The European Journal of Research and Development  
In the receiver, the symbol starting point is estimated by a correlation-based timing metric that uses the periodic properties of the preamble.  ...  The performance of the timing synchronization algorithms has been compared with the proposed method in terms of mean squared error (MSE).  ...  In the following subsections, correlation-based timing algorithms, which are frequently used in the literature, are introduced. 2.1.Schmidl's Method The symbol timing estimation is provided by the preamble  ... 
doi:10.56038/ejrnd.v2i2.91 fatcat:vif5ncuzqvbatfla5br3ccfrbq

Frequency Synchronization in OFDM System

C. Geetha Priya, A. M. Vasumathi
2013 Journal of Signal and Information Processing  
An accurate frequency synchronization method using the zadoff-chu (ZC) constant envelop preamble is analyzed, and a new preamble weighted by pseudo-noise sequence is used for orthogonal frequency division  ...  Using this method, frequency offset estimator range is greatly enlarged with no loss in accuracy. The range of the frequency estimation is ±30 of subcarrier spacing using ZC sequence as preamble.  ...  Fredrik Tufvesson et al. compared and analyzed the preambles for OFDM systems based on repeated OFDM data symbols or repeated short pseudo noise sequences.  ... 
doi:10.4236/jsip.2013.43b024 fatcat:jhtk4quoqfhnxbgkrjj54ceqvi

Overview on synchronization in OFDM systems

Chandresh D. Parekha, Jayesh M. Patel
2016 2016 International Conference on Advances in Computing, Communication, & Automation (ICACCA) (Spring)  
This paper provides an overview on the causes and the effects of these synchronization errors.  ...  It focuses on various symbol timing and carrier frequency acquisition schemes including coarse and fine synchronization techniques, using cyclic prefix or training symbols.  ...  It is also way to optimize the preamble using method of false detection under low SNR that is based on MMSE normalized metric method proposed by Minn [24] .  ... 
doi:10.1109/icacca.2016.7578862 fatcat:vkr6cpp2b5frdmctb53lm7hjkm

Symbol Timing Detection for OFDM Signals with Time Varying Gain

Jihye Lee, Taehyun Jeon
2013 International Journal of Control and Automation  
The packet based OFDM (Orthogonal Frequency Division Multiplexing) systems require the fast timing synchronization using a preamble located at the beginning of the received data frame.  ...  To detect the symbol timing of the received signal, periodicity of the preamble can be utilized.  ...  Some of the traditional methods for timing detection include auto-correlation and cross-correlation based method.  ... 
doi:10.14257/ijca.2013.6.5.35 fatcat:myq5qepehjhrje26vqlptiyyju

Synchronization and Preamble Concept for Frame Detection in OFDM

Rakhi Thakur, Kavita Khare
2013 International Journal of Modeling and Optimization  
One of the major problems, encountered in the OFDM systems is their synchronization.  ...  The synchronizations tasks sometimes require an extensive processing and highly effective systems and methods for synchronizing OFDM receiver parameters to an OFDM transmitter are provided.  ...  The synchronization tasks that we would like to focus on now are frame and frequency synchronization based on preambles. There are many techniques for OFDM based wireless communications.  ... 
doi:10.7763/ijmo.2013.v3.237 fatcat:znaz6exklzbrnbbymu5jdauaq4

A Low-Complexity Synchronizer for OFDM-Based UWB System

Hsuan-Yu Liu, Chen-Yi Lee
2006 IEEE transactions on circuits and systems - 2, Analog and digital signal processing  
Based on the data-partition algorithms, both single auto-correlator and moving-average-free matched filter are developed with 528 Msample/s throughput for the 480 Mb/s UWB design.  ...  In this paper, a low-complexity synchronizer combining data-partition-based correlation algorithms and dynamic-threshold design is proposed for orthogonal frequency division multiplexing based UWB system  ...  Preamble structure of OFDM-based UWB system. based OFDM system [2]- needs to store the received samples in the registers according to different FWD timing .  ... 
doi:10.1109/tcsii.2006.882804 fatcat:y5wczcougje27hmkxberi5rd2u
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