频率选择瑞利衰落信道下OFDM-CDM系统的比例公平功率分配

2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI:10.1109/SPAWC.2006.346467

F. Brah, J. Louveaux, L. Vandendorpe

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引用次数: 3

摘要

正交频分复用码分复用(OFDM- cdm)是OFDM技术与CDMA技术相结合的一种方案。CDM组件可以在频率选择性衰落信道中实现额外的分集。针对基于ofdm - cdm的系统，提出了一种基于提议公平策略的最优功率分配方法。在移动单元上使用零强迫波束形成器，基站在公平约束下优化其功率分配以使和速率最大化。提出了两种优化技术。给出了典型下行链路情况下的仿真结果，并与无公平请求优化后的系统进行了公平性指标比较

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Proportional Fair Power Allocation for OFDM-CDM Systems in Frequency-Selective Rayleigh Fading Channels

Orthogonal frequency division multiplexing with code division multiplexing (OFDM-CDM) is one of the combined schemes of OFDM and CDMA techniques. The CDM component enables additional diversity in frequency selective fading channels. This paper proposes an optimal power allocation via proposal-fair strategy for the OFDM-CDM-based systems. A zero-forcing beamformer is used at the mobile unit and the basestation optimizes its power allocation to maximize the sum-rate subject to fairness constraints. Two optimization techniques are proposed. Simulation results are provided for typical downlink situation and a fairness index is compared to that of system optimized without fairness request

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2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications

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