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A Signal Detection Technique for OFDMA-based Wireless Mesh Networks with Different Time Delays  

Park, Chang-Hwan (School of Electrical & Electronic Engineering, Chung-Ang University)
Yoo, Hyun-Il (School of Electrical & Electronic Engineering, Chung-Ang University)
Kim, Yeong-Jun (School of Electrical & Electronic Engineering, Chung-Ang University)
Kwon, Dong-Seung (Wireless System Research Department, Korea Electronics Technology Institute)
Cho, Yong-Soo (School of Electrical & Electronic Engineering, Chung-Ang University)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.6C, 2010 , pp. 495-505 More about this Journal
Abstract
In this paper, the effect of Near-Far Problem (NFP) among distributed nodes in OFDMA-based Wireless Mesh Networks (WMNs) is analyzed by investigating statistical characteristics of Time Difference of Arrival (TDoA) and Desired-to-Undesired power Ratio (DUR). In order to overcome the effects of Inter-Symbol Interference (ISI), Inter-Carrier Interference (ICI), and Inter Link Interference (ILI), caused by TDoA in WMNs, we derive effective SINR for each subcarrier, and then, propose the optimal starting point of FFT window which can minimize BER for each subcarrier. In addition, we propose a subcarrier-based Zero Forcing - 2 Dimensional Ordered Successive Interference Cancellation (ZF-2DOSIC) technique for signal detection in WMNs with TDoA. It is verified by simulation that the effective SINR and uncoded BER performances of the proposed signal detection technique for OFDMA-based WMNs are significantly improved, compared with those of conventional technique.
Keywords
OFDMA; Wireless Mesh Networks; TDoA; ICI; ISI;
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1 Y. Gu and T. Le-Ngoc, "Adaptive combined DFE/MLSE techniques for ISI channels," IEEE Trans. Commun., Vol.44, pp.847-857, July 1996.   DOI   ScienceOn
2 T. Karp, S. Trautmann, and N. J. Fliege, "Zero-Forcing Frequency-Domain Equalization for Generalized DMT Transceivers with Insufficient Guard Interval", EURASIP Journal on Applied Signal Processing, pp.1446-1459, Aug. 2004.
3 I. F. Akyildiz, X. Wang, "A survey on wireless mesh networks," IEEE Commun. Mag., Vol.43, No.9, pp.S23-S30, Sept. 2005.
4 S. J. Lee et. al., "Understanding Interference and Carrier Sensing in Wireless Mesh Networks," IEEE Commun. Mag., Vol.47, pp.102-109, July 2009.
5 $ccot{O}$. Oyman, J. N. Laneman, and S. Sandhu, "Multihop relaying for broadband wireless mesh networks: from theory to practice," IEEE Commun. Mag., Vol.45, No.11, pp. 116-122, Nov. 2007.
6 H. Anouar, C. Bonnet, F. Kaltenberger, and R. Knopp, "OpenAirMesh-an experimental platform for cooperative mesh networks," in Proc. 1st COST2100 Workshop on MIMO and Cooperative Communications, Trondheim, Norway, Jun. 2008.
7 E. Sourour and M. Nakagawa, "Mutual Decentralized Synchronization for Intervehicle Communications," IEEE Trans. Veh. Technol., Vol.48, pp.2015-2027, Nov. 1999.   DOI   ScienceOn
8 O. Simeone, U. Spagnolini, Y. Bar-Ness, and S.H. Strogatz, "Distributed Synchronization in Wireless Networks," IEEE Signal Processing Mag., Vol.25, No.5, pp.81-97, Sept. 2008.   DOI
9 S. Trautmann and N. J. Fliege, "Perfect equalization for DMT systems without guard interval," IEEE J. Select. Areas Commun., Vol.20, pp.987-996, May 2002.   DOI   ScienceOn
10 P. J. W. Melsa, R. C. Younce, and C. E. Rohrs, "Impulse response shortening for discrete multitone transceivers," IEEE Trans. Commun., Vol.44, No.12, pp.1662-1672, Dec. 1996.   DOI   ScienceOn
11 L. JunHwan et. al., "Turbo Equalized Double Window Cancellation and Combining Robust to Large Delay Spread Channel," IEICE Trans. Commun., Vol.92, No.2, pp.517-526, Feb. 2009.
12 K. Van Acker, G. Leus, M. Moonen, O. van de Wiel, and T. Pollet, "Per tone equalization for DMT-based systems," IEEE Trans. Commun., Vol.49, No.1, pp.109-119, Jan. 2001.   DOI   ScienceOn
13 J. M. Cioffi and A. C. Bingham, "A data-driven multitone echo canceller," IEEE Trans. Commun., Vol.42. pp.2853-2869, Oct. 1994.   DOI   ScienceOn
14 D. Kim and G.L. Stuber, "Residual ISI cancellation for OFDM with applications to HDTV broadcasting," IEEE J. Sel. Areas Commun., Vol.16, No.8, pp.1590-1599, Oct. 1998.   DOI   ScienceOn
15 S. Suyama, H. Suzuki, and K. Fukawa, "An OFDM receiver employing turbo equalization for multipath environments with delay spread greater than the guard interval," in Proc. IEEE Veh. Technol., Vol.1, pp.632-636, Apr. 2003.
16 Y. Sagae, S. Suyama, H. Suzuki, and K. Fukawa, "An OFDM turbo equalizer for scattered pilot signals in multipath environments with delay difference greater than guard interval," in Proc. IEEE Veh. Technol., Vol.1, pp.425-429, May 2004.
17 S.B. Yun et. al., "Hybrid Division Duplex System for Next Generation Cellular Services," IEEE Trans. Veh. Technol., Vol.56, pp.3040-3059, Sept. 2007.   DOI
18 J.R. Barry, E.A. Lee, and D.G. Messerschmitt, Digital Communication, 3rd ed., Kluwer Academic Publishers, 2004.
19 S. W. Kim and K. P. Kim, "Loglikelihood- ratio-based detection ordering in V-BLAST," IEEE Trans. Commun., Vol.54, pp.302-307, Feb. 2006.   DOI