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


Vol. 35,  No. 6, pp. 495-505, Jun.  2010


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  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.

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  Cite this article

[IEEE Style]

C. H. Park, H. I. Yoo, Y. J. Kim, D. S. Kwon, Y. S. Cho, "A Signal Detection Technique for OFDMA-based Wireless Mesh Networks with Different Time Delays," The Journal of Korean Institute of Communications and Information Sciences, vol. 35, no. 6, pp. 495-505, 2010. DOI: .

[ACM Style]

Chang Hwan Park, Hyun Il Yoo, Yeong Jun Kim, Dong Seung Kwon, and Yong Soo Cho. 2010. A Signal Detection Technique for OFDMA-based Wireless Mesh Networks with Different Time Delays. The Journal of Korean Institute of Communications and Information Sciences, 35, 6, (2010), 495-505. DOI: .

[KICS Style]

Chang Hwan Park, Hyun Il Yoo, Yeong Jun Kim, Dong Seung Kwon, Yong Soo Cho, "A Signal Detection Technique for OFDMA-based Wireless Mesh Networks with Different Time Delays," The Journal of Korean Institute of Communications and Information Sciences, vol. 35, no. 6, pp. 495-505, 6. 2010.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880