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Cross-layer enhanced time scheduling for multi-band OFDM UWB networks

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Abstract

Multi-band Orthogonal Frequency Division multiplexing based Ultra Wide-band (MB-OFDM UWB) technology is one of the strong alternatives for high data rate wireless personal area networks (WPANs) with low power consumption. The capacity of such systems is degraded by multi-path fading, shadowing, multi-user interference and noise. To improve system capacity under these adverse effects, in this paper, we devise cross-layer time scheduling methods, Proportional Time Scheduling with Modiano Algorithm (PTS-MA) and Proportional Time Scheduling with Channel State Information (PTS-CSI), in which scheduling and link adaptation are performed using instantaneous bit error probability (IBEP) estimates obtained through Modiano’s algorithm and our novel estimation technique, respectively. We evaluate the performance of the PTS schemes by using numerical experiments. Simulation results suggest PTS-CSI scheduler as the most promising candidate for practical MB-OFDM UWB WPANs with high capacity and fair throughput distribution.

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Notes

  1. Here, we assume that Imm-Ack packets are transmitted without errors, since such small control packets can be well protected by strong error correction.

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Acknowledgments

This work is supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under grant No. 105E082.

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Authors and Affiliations

  1. Faculty of Engineering & Natural Sciences, Sabanci University, Istanbul, 34956, Turkey

    Mehmet Keskinoz, Ozgur Gurbuz & Engin Masazade

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  1. Mehmet Keskinoz
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  2. Ozgur Gurbuz
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  3. Engin Masazade
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Correspondence to Mehmet Keskinoz.

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Keskinoz, M., Gurbuz, O. & Masazade, E. Cross-layer enhanced time scheduling for multi-band OFDM UWB networks. Wireless Netw 16, 863–873 (2010). https://doi.org/10.1007/s11276-009-0173-2

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