Abstract
Hierarchical Modulation (HM) is a means to enhance the spectral efficiency of a system by superposing, in terms of modulation, an additional stream for a given user with good radio conditions on a basic stream of a user with worse radio conditions. This, in turn, increases the throughput of the former user and hence the overall performance of the whole system. We consider, in this work, such a performance at the flow level, for a realistic dynamic setting where users come to the system and leave it after a finite duration corresponding, for instance, to the completion of a file transfer. We specifically model and quantify, both analytically and via simulations, the gain thus achieved and propose two extensions to the basic HM algorithm: a first one in which a user with bad radio conditions is also superposed on one with better radio conditions and a second one in which a user of one type is further superposed on a user of the same type as well.
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References
Tse, D., & Viswanath, P. (2005). Fundamentals of wireless communication. Cambridge: Cambridge University Press.
IEEE 802.16-2005 (2006). Part 16: Air interface for fixed and mobile broadband wireless access systems. IEEE Standard for local and metropolitan area networks.
Cover, T. (1972). Broadcast channels. IEEE Transactions on Information Theory, IT-18, 2–14.
Hossain, Md. J., Alouini, M.-S., & Bhargava, V. K. (2007). Multi-user opportunistic scheduling using power controlled hierarchical constellations. IEEE Transactions on Wireless Communications, 6, 1581–1586.
ETSI Standard (2001). EN 300 744 V1.5.1, Digital video broadcasting (DVB); framing structure, channel coding and modulation for digital terrestrial television.
Bopping, S., & Shea, J. M. (2006). Superposition coding in the downlink of CDMA cellular systems. IEEE Wireless Communications and Networking Conference, 4(3–6), 1978–1983.
Liu, B., Li, H., & Liu, H. (2008). DPC-based hierarchical broadcasting: design and implementation. IEEE Transactions on Vehicular Technology, 57(6), 3895–3900.
Najeh, S., & Besbes, H. (2010). A simple superposition coding scheme for optimizing resource allocation in downlink OFDMA systems. Berlin: Springer.
Ng, T. C.-Y., & Yu, W. (2007). Joint optimization of relay strategies and resource allocations in cooperative cellular networks. IEEE Journal on Selected Areas in Communications, 25(2), 328–339.
Li, Y. G., & Stuber, G. L. (Eds.) (2005). Orthogonal frequency division multiplexing for wireless communications. Berlin: Springer.
Bonald, T., & Proutiere, A. (2003). Wireless downlink data channels: user performance and cell dimensioning. In MobiCom’2003, San Diego, September 2003.
Vitthaladevuni, P. K., & Alouini, M.-S. (2001). BER computation of 4/M-QAM hierarchical constellations. IEEE Transactions on Broadcasting, 47(3), 228–239.
Pietrzyk, S., & Janssen, G. J. M. (2004). Subcarrier and power allocation for QoS-aware OFDMA systems using embedded modulation. In ICC’2004, Paris, June 2004.
Hossain, Md. J., Alouini, M.-S., & Bhargava, V. K. (2008). Two-user opportunistic scheduling using hierarchical modulations in wireless networks with heterogenous average link gains. In ICC’2008, Beijing, May 2008.
Shen, Z., Andrews, J. G., & Evans, B. L. (2005). Adaptative resource allocation in multiuser OFDM system with proportional rate constraints. IEEE Transactions Wireless Communications, 4(6), 2726–2737.
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Jdidi, A., Chahed, T., Elayoubi, S.E. et al. Modeling the flow-level performance of hierarchical modulation in OFDMA-based networks. Telecommun Syst 50, 169–180 (2012). https://doi.org/10.1007/s11235-010-9398-8
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DOI: https://doi.org/10.1007/s11235-010-9398-8