Journal Article10.1109/LSP.2014.2359872
Synchronization Sequence Generated by Modified Park Algorithm for NC-OFDM Transmission
Chao Zhang,Keke Pang +1 more
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TL;DR: This new synchronization concept not only complies with the traditional Park algorithm, but also has the considerable smaller sidelobes in the correlation function evaluated for the time synchronization, so that a higher synchronization detection probability is obtained.
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Abstract: The traditional schemes for the synchronization in the OFDM transmission, such as the Schmidl&Cox, Minn and Park algorithms, utilize the only every second or fourth subcarriers of the preamble symbol. This regular subcarrier occupation pattern does not meet the requirement of Non-Continuous OFDM (NC-OFDM) with the arbitrary spectrum holes free from the interference with the primary users. In this letter, a special synchronization sequence with non-continuous spectrum is constructed and can be evaluated at the receiver with a modified version of the Park algorithm. Our new synchronization concept not only complies with the traditional Park algorithm, but also has the considerable smaller sidelobes in the correlation function evaluated for the time synchronization, so that a higher synchronization detection probability is obtained.
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Citations
Broadband Hybrid Satellite-Terrestrial Communication Systems Based on Cognitive Radio toward 5G
TL;DR: This article proposes a space segment design based on a spectrum-sensing-based cooperative framework, in consideration of the presence of MUs, and presents an overview of future broadband hybrid S-T communications systems, followed by an introduction to a typical application scenario of futuristic CR-broadband hybridS-T communication systems toward 5G.
341
Adaptive finite-time outer synchronization between two complex dynamical networks with noise perturbation
Maoxing Liu,Jie Wu,Yongzheng Sun +2 more
TL;DR: Finite-time outer synchronization between two complex dynamical networks with noise perturbation is considered and a novel adaptive finite-time controller is designed based on the finite- time stability theory of stochastic differential equations.
28
A Robust Timing Synchronization Method for OFDM Systems over Multipath Fading Channels
Han Yang,Lintao Li,Jiaxuan Li +2 more
- 09 Aug 2020
TL;DR: In this work, a robust timing synchronization method based on fast timing search window and double threshold for decision is proposed that can effectively reduce the false alarm probability and the double threshold decision can reduce the acquisition lost probability.
7
A novel joint timing/frequency synchronization scheme based on Radon-Wigner transform of LFM signals in CO-OFDM systems
TL;DR: Simulation results show that the proposed method can give a more accurate TO estimation than the existing methods, especially at poor OSNR conditions; for the FO estimation, both the fractional and the integer FO can be estimated through the proposed training symbol with no extra overhead.
4
•Dissertation
Timing and Frequency Synchronization and Channel Estimation in OFDM-based Systems
Hamed Abdzadeh Ziabari
- 06 Dec 2017
TL;DR: This thesis investigates new methods for preamble-aided coarse timing estimation and joint timing and frequency synchronization and channel estimation in OFDM-based systems and presents a new scheme for joint estimation of CFO and doubly selective channel in orthogonal frequency division multiplexing systems.
3
References
Robust frequency and timing synchronization for OFDM
T.M. Schmidl,Donald C. Cox +1 more
TL;DR: A rapid synchronization method is presented for an orthogonal frequency-division multiplexing (OFDM) system using either a continuous transmission or a burst operation over a frequency-selective channel.
On timing offset estimation for OFDM systems
TL;DR: Two timing offset estimation methods for orthogonal frequency division multiplexing (OFDM) systems as modifications to Schmidl and Cox's method are presented and both have significantly smaller estimator variance in both channel conditions.
A novel timing estimation method for OFDM systems
TL;DR: The estimator proposed here is designed to avoid the ambiguity which occurs in Schmidl's (1997) timing offset estimation method and has a significantly smaller MSE than the other estimators.
414
A novel timing estimation method for OFDM systems
Byungjoon Park,Hyunsoo Cheon,Changeon Kang,Daesik Hong +3 more
- 17 Nov 2002
TL;DR: The simulation results show that the proposed estimator is unbiased and has significantly smaller MSE than the current estimator, which is designed to avoid the ambiguity in timing offset estimation.
277
Broadband VHF communications VIA non-continuous OFDM
Chao Zhang,Han Han +1 more
- 04 Dec 2009
TL;DR: Simulation results show that more than twice gain can be obtained in the capacity compared with the traditional B-VHF system, and the paper predicts a drastically increasing of the capacity of NC-B-V HF if involves the structure of the cognitive radio.
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