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多用户OFDM系统子载波比特分配算法

DOI: 10.13190/jbupt.200804.112.022, PP. 112-116

Keywords: 多用户正交频分复用,子载波、比特分配,最小化-最大者

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Abstract:

针对多用户正交频分复用技术(OFDM)系统功率优化问题,提出一种高效的子载波、比特分配算法。该算法基于最小化-最大者(Min-Max)的原则逐个分配子载波使用户功率递减,采用注水原理分配比特使用户功率最小化,最后使用贪婪算法将分配比特取整,以实现系统功率最小化的目标。理论分析和仿真结果表明,提出的算法有效降低系统发射功率,同时降低了运算的复杂度。

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