Information Fields Navigation with Piece-Wise Polynomial Approximation for High-Performance OFDM in WSNs
Joint Authors
Shen, Pei-Yi
Zhang, Ying
Zhang, Liang
Wei, Wei
Source
Mathematical Problems in Engineering
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-03-23
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Since Wireless sensor networks (WSNs) are dramatically being arranged in mission-critical applications,it changes into necessary that we consider application requirements in Internet of Things.
We try to use WSNs to assist information query and navigation within a practical parking spaces environment.
Integrated with high-performance OFDM by piece-wise polynomial approximation, we present a new method that is based on a diffusion equation and a position equation to accomplish the navigation process conveniently and efficiently.
From the point of view of theoretical analysis, our jobs hold the lower constraint condition and several inappropriate navigation can be amended.
Information diffusion and potential field are introduced to reach the goal of accurate navigation and gradient descent method is applied in the algorithm.
Formula derivations and simulations manifest that the method facilitates the solution of typical sensor network configuration information navigation.
Concurrently, we also treat channel estimation and ICI mitigation for very high mobility OFDM systems, and the communication is between a BS and mobile target at a terrible scenario.
The scheme proposed here combines the piece-wise polynomial expansion to approximate timevariations of multipath channels.
Two near symbols are applied to estimate the first-and second-order parameters.
So as to improve the estimation accuracy and mitigate the ICI caused by pilot-aided estimation, the multipath channel parameters were reestimated in timedomain employing the decided OFDM symbol.
Simulation results show that this method would improve system performance in a complex environment.
American Psychological Association (APA)
Wei, Wei& Shen, Pei-Yi& Zhang, Ying& Zhang, Liang. 2013. Information Fields Navigation with Piece-Wise Polynomial Approximation for High-Performance OFDM in WSNs. Mathematical Problems in Engineering،Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-1032440
Modern Language Association (MLA)
Wei, Wei…[et al.]. Information Fields Navigation with Piece-Wise Polynomial Approximation for High-Performance OFDM in WSNs. Mathematical Problems in Engineering No. 2013 (2013), pp.1-9.
https://search.emarefa.net/detail/BIM-1032440
American Medical Association (AMA)
Wei, Wei& Shen, Pei-Yi& Zhang, Ying& Zhang, Liang. Information Fields Navigation with Piece-Wise Polynomial Approximation for High-Performance OFDM in WSNs. Mathematical Problems in Engineering. 2013. Vol. 2013, no. 2013, pp.1-9.
https://search.emarefa.net/detail/BIM-1032440
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1032440