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OFDMA-SDMA系统下行链路的资源分配

DOI: 10.13190/jbupt.200706.116.songxh, PP. 116-120

Keywords: 波束成形,跨层设计,空分多址,空间正交性

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Abstract:

研究了采用正交频分多址-空分多址(OFDMA-SDMA)混合多址接入系统下行链路的无线资源分配问题,综合考虑了物理层上的约束条件(用户的误比特率性能以及信道的空间正交性)和媒体接入控制层的约束条件(用户对服务质量的要求和用户之间的公平性),提出了一种简单有效的信道/比特和功率分配方案。首先为每个子载波分配一组用户;然后为每个子载波上的用户组分配传输速率和功率。仿真结果表明,新算法的实现复杂度低,在保障用户服务质量的同时提高了资源的利用效率,并且兼顾了一定的公平性。

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