title   
  

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

Keskinöz, Mehmet and Gürbüz, Özgür and Maşazade, Engin (2010) Cross-layer enhanced time scheduling for multi-band OFDM UWB networks. Wireless Networks, 16 (3). pp. 863-873. ISSN 1022-0038 (Print) 1572-8196 (Online)

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Official URL: http://dx.doi.org/10.1007/s11276-009-0173-2

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.

Item Type:Article
Uncontrolled Keywords:Opportunistic scheduling - Link adaptation - Multi-band OFDM - Ultra-wide band - Instantenous bit error estimation
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
ID Code:11534
Deposited By:Özgür Gürbüz
Deposited On:11 Jun 2009 10:16
Last Modified:25 May 2011 14:18

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