Abstract
Coexistence and interoperability between 20 MHz and 40 MHz device and modes of operations are stressed in standard IEEE 802.11n system. It is mandate to report the both sub-channels states to Medium Access Control (MAC) at receiver, since for 40 MHz device, it should serve not only 20 MHz but also 40 MHz signals receiving. Both energy detection and carrier sense are employed to detect channel state. In the case of 20/40 M mode, the power difference between the two sub-channels is also detected in order to report the channel state accurately. The simulation results demonstrate that the performance of the proposed methods are much better than the methods which just employ energy detection. Besides, the simulation results show that the proposed methods ensure that the channel sensing is not a roadblock of IEEE 802.11n system design.
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References
IEEE Std 802.11nTM-2009: Available:http://standards.ieee.org/getieee802/downl-oad/802.11n-2009.pdf.
Y. Zhu, Q. Zhang, Z. Niu, et al. On optimal physical carrier sensing: theoretical analysis and protocol design. 26th IEEE International Conference on Computer Communications, May 2007, 2351–2355.
X. Yang and N. H. Vaidya. On physical carrier sensing in wireless Ad hoc networks. 24th Annual Joint Conference of the IEEE Computer and Communications Societies, March 2005, 2525–2535.
J. A. Fuemmeler, N. H. Vaidya, and V. V. Veeravalli. Selecting transmit powers and carrier sense thresholds for CSMA protocols (Technical Report, Oct. 2004). www.crhc.illinois.edu/wireless/papers/PowerCarrierSense04.pdf.
Eldad Perahia and Robert Stacey. Next Generation Wireless LANs. New York, Cambridge University Press, 2008, 15–16.
Thomas Paul and Tokunbo Ogunfunmi. Wireless LAN comes of age: Understanding IEEE802.11n amendment. IEEE Circuits and Systems Magazine, 8(2008)1, 28–54.
S. S. Haykin. Different forms of the Hilbert transform as applied to digital filters and sequence. Proceedings of the Institution of Electrical Engineers, 121(1974)7, 561–567.
Luca Scalia, Joerg Widmer, and Imad Aad. On the side effects of packet detection sensitivity in IEEE 802.11 interference management. 2010 IEEE International Symposium on a World of Wireless Mobile and Multimedia Networks (WoWMoM), June 2010, 1–7.
TGn Channel Models, IEEE std. 802.11-03/940r4. May, 2004. Available: http://www.ieee802org/11/DocFiles/03/11-0300940-04-000n-tgn-channel-models.doc.
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Communication author: Yao Xiaocheng, born in 1982, male, Ph.D. candidate.
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Yao, X., Jian, H., Fang, Z. et al. An improved channel detection method for IEEE 802.11N MIMO system. J. Electron.(China) 28, 658–663 (2011). https://doi.org/10.1007/s11767-012-0788-9
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DOI: https://doi.org/10.1007/s11767-012-0788-9