Performance evaluation of OFDMA techniques in multicellular networks

Orthogonal Frequency Division Multiple Access (OFDMA) techniques are investigated in this paper. Five sub-channel allocation algorithms are analysed and their performance in a multicellular environment is evaluated with simulations. Four schemes of lower complexity, suitable for the early deployment of wireless systems, are compared with a more computationally demanding scheme with respect to their blocking probability, loading factor, and offered bit rate. The channel condition of each carrier is calculated and its knowledge is used for power controlled adaptive modulation, as an essential feature of the OFDMA technique. The results show that a wireless system in its early deployment phase (up to 15%-30% blocking probability) can employ simple OFDMA techniques capable of achieving high throughput.

[1]  Gábor Fodor.  Performance Analysis of a Reuse Partitioning Technique for OFDM Based Evolved UTRA , 2006, 200614th IEEE International Workshop on Quality of Service.

[2]  Theodore S. Rappaport,et al.  Wireless communications - principles and practice , 1996 .

[3]  Georgia E. Athanasiadou.  Incorporating the Fresnel Zone Theory in Ray Tracing for Propagation Modelling of Fixed Wireless Access Channels , 2007, 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications.

[4]  Didem Kivanc-Tureli,et al.  Computationally efficient bandwidth allocation and power control for OFDMA , 2003, IEEE Trans. Wirel. Commun..

[5]  Dimitra Zarbouti,et al.  Subcarrier allocation algorithms for multicellular OFDMA networks without Channel State Information , 2008, 2008 3rd International Symposium on Wireless Pervasive Computing.

[6]  George V. Tsoulos,et al.  On the application of adaptive antennas to microcellular environments: radio channel characteristics and system performance , 2002, IEEE Trans. Veh. Technol..

[7]  Gerard J. M. Janssen,et al.  Radio resource allocation for cellular networks based on OFDMA with QoS guarantees , 2004, IEEE Global Telecommunications Conference, 2004. GLOBECOM '04..

[8]  Dacheng Yang,et al.  A Novel Frequency Reuse Scheme for Multi-Cell OFDMA Systems , 2007, 2007 IEEE 66th Vehicular Technology Conference.

[9]  Ieee Microwave Theory,et al.  Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems — Amendment for Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands , 2003 .