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OFDMA Architectures, Protocols, and Applications

  1. Research Article

    A Fast LMMSE Channel Estimation Method for OFDM Systems

    A fast linear minimum mean square error (LMMSE) channel estimation method has been proposed for Orthogonal Frequency Division Multiplexing (OFDM) systems. In comparison with the conventional LMMSE channel esti...

    Wen Zhou and Wong Hing Lam

    EURASIP Journal on Wireless Communications and Networking 2009 2009:752895

    Published on: 4 May 2009

  2. Research Article

    Multiresolution with Hierarchical Modulations for Long Term Evolution of UMTS

    In the Long Term Evolution (LTE) of UMTS the Interactive Mobile TV scenario is expected to be a popular service. By using multiresolution with hierarchical modulations this service is expected to be broadcaste...

    Américo Correia, Nuno Souto, Armando Soares, Rui Dinis and João Silva

    EURASIP Journal on Wireless Communications and Networking 2009 2009:240140

    Published on: 8 April 2009

  3. Research Article

    Contiguous Frequency-Time Resource Allocation and Scheduling for Wireless OFDMA Systems with QoS Support

    The orthogonal frequency division multiple access (OFDMA) scheme has been selected as a potential candidate for many emerging broadband wireless access standards. In this paper, a new joint scheduling and reso...

    I Gutiérrez, F. Bader, R. Aquilué and J. L. Pijoan

    EURASIP Journal on Wireless Communications and Networking 2009 2009:134579

    Published on: 1 April 2009

  4. Research Article

    Residue Number System Arithmetic Assisted Coded Frequency-Hopped OFDMA

    We propose an RNS arithmetic-based FH pattern design approach that is well suited and easy to implement for practical OFDMA systems. The proposed FH scheme guarantees orthogonality among intracell users while ...

    Dalin Zhu and Balasubramaniam Natarajan

    EURASIP Journal on Wireless Communications and Networking 2009 2009:263695

    Published on: 26 March 2009

  5. Research Article

    Throughput Analysis of Band-AMC Scheme in Broadband Wireless OFDMA System

    In broadband wireless Orthogonal Frequency Division Multiple Access (OFDMA) systems where a set of subcarriers are shared among multiple users, the overall system throughput can be improved by a band-AMC mode ...

    Sung K. Kim and Chung G. Kang

    EURASIP Journal on Wireless Communications and Networking 2009 2009:147231

    Published on: 8 March 2009

  6. Research Article

    Implementation of a Smart Antenna Base Station for Mobile WiMAX Based on OFDMA

    We present an implementation of a mobile-WiMAX (m-WiMAX) base station (BS) that supports smart antenna (SA) functionality. To implement the m-WiMAX SA BS, we must address a number of key issues in baseband sig...

    Seungheon Hyeon, Changhoon Lee, Chang-eui Shin and Seungwon Choi

    EURASIP Journal on Wireless Communications and Networking 2009 2009:950674

    Published on: 4 March 2009

  7. Research Article

    Multiuser Resource Allocation Maximizing the Perceived Quality

    Multiuser resource allocation for time/frequency slotted wireless communication systems is addressed. A framework for application driven cross-layer optimization (CLO) between the application (APP) layer and m...

    Andreas Saul and Gunther Auer

    EURASIP Journal on Wireless Communications and Networking 2009 2009:341689

    Published on: 3 March 2009

  8. Research Article

    Advanced Receiver Design for Quadrature OFDMA Systems

    Quadrature orthogonal frequency division multiple access (Q-OFDMA) systems have been recently proposed to reduce the peak-to-average power ratio (PAPR) and complexity, and improve carrier frequency offset (CFO...

    Lin Luo, Jian(Andrew) Zhang and Zhenning Shi

    EURASIP Journal on Wireless Communications and Networking 2009 2009:953018

    Published on: 26 February 2009

  9. Research Article

    OFDMA-Based Medium Access Control for Next-Generation WLANs

    Existing medium access control (MAC) schemes for wireless local area networks (WLANs) have been shown to lack scalability in crowded networks and can suffer from widely varying delays rendering them unsuited t...

    H.M. Alnuweiri, Y. Pourmohammadi Fallah, P. Nasiopoulos and S. Khan

    EURASIP Journal on Wireless Communications and Networking 2009 2009:512865

    Published on: 23 February 2009

  10. Research Article

    An Opportunistic Error Correction Layer for OFDM Systems

    We propose a novel cross layer scheme to reduce the power consumption of ADCs in OFDM systems. The ADCs in a receiver can consume up to 50% of the total baseband energy. Our scheme is based on resolution-adapt...

    Xiaoying Shao, Roel Schiphorst and Cornelis H Slump

    EURASIP Journal on Wireless Communications and Networking 2009 2009:750735

    Published on: 18 February 2009

  11. Research Article

    Separate Turbo Code and Single Turbo Code Adaptive OFDM Transmissions

    This paper discusses the application of adaptive modulation and adaptive rate turbo coding to orthogonal frequency-division multiplexing (OFDM), to increase throughput on the time and frequency selective chann...

    Lei Ye and Alister Burr

    EURASIP Journal on Wireless Communications and Networking 2009 2009:609386

    Published on: 18 February 2009

  12. Research Article

    DFT-Based Channel Estimation with Symmetric Extension for OFDMA Systems

    A novel partial frequency response channel estimator is proposed for OFDMA systems. First, the partial frequency response is obtained by least square (LS) method. The conventional discrete Fourier transform (D...

    Yi Wang, Lihua Li, Ping Zhang and Zemin Liu

    EURASIP Journal on Wireless Communications and Networking 2009 2009:647130

    Published on: 18 January 2009

  13. Research Article

    Near-Optimum Detection with Low Complexity for Uplink Virtual MIMO Systems

    In mobile worldwide interoperability for microwave access (WiMAX) or 3rd Generation partnership project long-term evolution (3GPP-LTE), uplink virtual multiple input multiple output (MIMO) technology is adopte...

    Sanhae Kim, Oh-Soon Shin and Yoan Shin

    EURASIP Journal on Wireless Communications and Networking 2009 2009:307407

    Published on: 15 January 2009

  14. Research Article

    Service Differentiation in OFDM-Based IEEE 802.16 Networks

    IEEE 802.16 network is widely viewed as a strong candidate solution for broadband wireless access systems. Various flexible mechanisms related to QoS provisioning have been specified for uplink traffic at the ...

    Yi Zhou, Kai Chen, Jianhua He, Haibin Guan, Yan Zhang and Alei Liang

    EURASIP Journal on Wireless Communications and Networking 2009 2009:635304

    Published on: 12 January 2009

  15. Research Article

    Admission Control Threshold in Cellular Relay Networks with Power Adjustment

    In the cellular network with relays, the mobile station can benefit from both coverage extension and capacity enhancement. However, the operation complexity increases as the number of relays grows up. Furtherm...

    Ki-Dong Lee and Byung K. Yi

    EURASIP Journal on Wireless Communications and Networking 2009 2009:275121

    Published on: 6 January 2009