OFDMA中断概率区域的有效逼近

2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications Pub Date : 2006-07-02 DOI:10.1109/SPAWC.2006.346431

J. Brehmer, C. Guthy, W. Utschick

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引用次数: 10

摘要

块衰落多用户OFDMA下行链路可以用其中断概率区域来表征。为了在无线资源分配中的应用，需要对中断区域进行高效的近似计算。该停运区域用其帕累托有效边界充分表征。因此，一组分布良好的有限帕累托有效样本提供了期望的有效近似。采用适当相等约束法计算有效点。此外，提出了一种选择等式约束的算法，该算法提供了良好的样本分布，保证了非凸PEC优化的快速收敛

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An Efficient Approximation of the OFDMA Outage Probability Region

A block-fading multi-user OFDMA downlink can be characterized by its outage probability region. For application in wireless resource allocation, a computationally efficient approximation of the outage region is required. The outage region is fully characterized by its Pareto efficient boundary. As a result, a finite set of well-distributed Pareto efficient samples provides the desired efficient approximation. The method of proper equality constraints (PEC) is employed to compute efficient points. In addition, an algorithm for choosing the equality constraints is presented, which provides a good distribution of samples and ensures fast convergence of the nonconvex PEC optimization

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

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