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International Journal of Antennas and Propagation
Volume 2013, Article ID 896906, 8 pages
http://dx.doi.org/10.1155/2013/896906
Research Article

A Novel Transformation Electromagnetic Theory-Based Coverage Optimization Method for Wireless Network

1State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, China
2School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing, China

Received 8 July 2013; Accepted 29 September 2013

Academic Editor: Ai Bo

Copyright © 2013 Yuanxuan Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Improving the reliability of the radio coverage in shadow area is always an important issue for the wireless communications. The emergence of the transformation electromagnetic (TE) technique provides a new method to control the propagation direction of the radio signal. This paper proposes a coverage optimization method based on the TE technique; a cloak which covers the surface of obstacle is designed to improve the coverage performance in shadow area. The material parameters of cloak are calculated by the transformation electromagnetic method. To solve the calculation problem for the rectangular obstacle, the Fourier series is used to approximately describe the rectangular boundaries. The effectiveness of the proposed cloak for the coverage optimization is validated by the theoretical analysis and simulation results. The simulation results show that the coverage performance can be improved significantly.