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International Journal of Antennas and Propagation
Volume 2013, Article ID 231794, 7 pages
http://dx.doi.org/10.1155/2013/231794
Research Article

High Energy Efficient Heterogeneous Networks: Cooperative and Cognitive Techniques

1Department of Management Science and Engineering, School of Economics and Management, Tsinghua University, ShuangQing Road 30, Beijing 100084, China
2Key Laboratory of Universal Wireless Communications of Ministry of Education, Wireless Signal Processing & Network Lab, Beijing University of Posts and Telecommunications, XiTuCheng Road 10, Beijing 100876, China

Received 7 November 2013; Revised 23 November 2013; Accepted 29 November 2013

Academic Editor: Xiang Zhang

Copyright © 2013 Heng Wang 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.

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