Subcarrier Allocation for multi-user OFDM system
Subcarrier Allocation for multi-user OFDM system
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DOI：
10.1109/apcc.2005.1554229
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发表时间：
2005-12
期刊：
影响因子：
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通讯作者：
Y. Otani;S. Ohno;K. Teo;Takao Hinamoto
中科院分区：
文献类型：
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作者：
Y. Otani;S. Ohno;K. Teo;Takao Hinamoto
正交频分多址（OFDMA）允许多个用户使用与单用户OFDM相同的带宽进行数据传输，并且是用于未来蜂窝系统的有希望的候选者。当前的一个关键问题是速率自适应资源分配问题。在本文中，我们提出了两个低复杂度的子载波分配方案的基础上的信道频率响应的大小。所提出的方法确保了公平的资源分配的副载波的数量与负担得起的比特率。蒙特-卡罗模拟表明，我们提出的方法实现了更高的整体比特率为所有用户相比，以前推导的子载波分配方案
Orthogonal frequency division multiple access (OFDMA) allows multiple users to make use of the same bandwidth as the single-user OFDM for data transmission and is a promising candidate to be used for future cellular systems. A key issue at hand is the rate-adaptive resource allocation problem. In this paper, we propose two subcarrier allocation schemes with low complexities based on the magnitude of the channel frequency responses. The proposed methods ensure a fair resource allocation in terms of the number of subcarriers with affordable bit-rates. Monte-Carlo simulations show that our proposed methods achieve a higher overall bit-rate for all users compared to previously derived subcarrier allocation schemes