EURASIP Journal on Wireless Communications and Networking
Volume 2006 (2006), Article ID 40380, 13 pages
doi:10.1155/WCN/2006/40380
Interference Mitigation for Coexistence of Heterogeneous Ultra-Wideband Systems
1Beijing University of Posts and Telecommunications, China
2Microsoft Research Asia, Beijing, China
3Hong Kong University of Science and Technology, Hong Kong
Received 29 August 2005; Revised 9 January 2006; Accepted 3 April 2006
Copyright © 2006 Yongjing Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Two ultra-wideband (UWB) specifications, that is, direct-sequence (DS) UWB and multiband-orthogonal frequency division multiplexing (MB-OFDM) UWB, have been proposed as the candidates of the IEEE 802.15.3a, competing for the standard of high-speed wireless personal area networks (WPAN). Due to the withdrawal of the standardization process, the two heterogeneous UWB technologies will coexist in the future commercial market. In this paper, we investigate the mutual interference of such coexistence scenarios by physical layer Monte Carlo simulations. The results reveal that the coexistence severely degrades the performance of both UWB systems. Moreover, such interference is asymmetric due to the heterogeneity of the two systems. Therefore, we propose the goodput-oriented utility-based transmit power control (GUTPC) algorithm for interference mitigation. The feasible condition and the convergence property of GUTPC are investigated, and the choice of the coefficients is discussed for fairness and efficiency. Numerical results demonstrate that GUTPC improves the goodput of the coexisting systems effectively and fairly with saved power.