| 多天线广播系统中利用信道时间相关特性的用户选择算法 |
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| 引用本文： | 王静,蒋占军,王炎,尤肖虎.多天线广播系统中利用信道时间相关特性的用户选择算法[J].东南大学学报,2008,24(1):1-5. |
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| 作者姓名： | 王静 蒋占军 王炎 尤肖虎 |
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| 作者单位： | 东南大学移动通信国家重点实验室 南京210096 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家自然科学基金 |
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| 摘 要： | 考虑无线信道的时间相关性,提出了2种多天线广播系统中降低复杂度的用户选择方案.根据信道相干时间和多普勒频率的关系,将发送信息序列划分为数据段.在每个数据段的开始时刻,利用贪婪用户选择算法做选择.在基于时间相关的用户选择算法SUSTC中,其余时隙仍然保持该段开始时刻的选择结果.而在改进的基于时间相关的用户选择算法ISUSTC中,在其余时刻,保留信道条件较好的一些用户仍被选中,然后在备选用户集合中更新其他用户.仿真结果表明,与贪婪用户选择方法相比,所提出的算法降低了用户选择复杂度而只需损失少许系统和容量.
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| 关 键 词： | 用户选择 多天线广播系统 信道时间相关性 |
| 修稿时间： | 2007年10月8日 |
Employing temporal channel correlation in user selection for MIMO broadcast systems |
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| Wang Jing,Jiang Zhanjun,Wang Yan,You Xiaohu.Employing temporal channel correlation in user selection for MIMO broadcast systems[J].Journal of Southeast University(English Edition),2008,24(1):1-5. |
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| Authors: | Wang Jing Jiang Zhanjun Wang Yan You Xiaohu |
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| Abstract: | Taking the time varying nature of wireless channels into account,two user selection schemes with lower complexity are developed for multiple-input multiple-output broadcast(MIMO BC)systems.According to the relationship between coherence time and Doppler frequency,an information frame is divided into several segments.At the beginning of each segment,the user selection is carried out with the greedy selection algorithm.In the simplified user selection algorithms employing the temporal correlation(SUSTC),the selection results are applied for all the remaining slots in each segment.But in the improved simplified user selection algorithms employing the temporal correlation(ISUSTC),at the remaining slots, users are kept with favorable channel conditions selected at the previous slot,and other users are updated from the candidate pool to communicate simultaneously.Simulations show that compared with the greedy user selection method,the proposed algorithms can reduce the selection complexity with a little sum capacity loss. |
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| Keywords: | user selection multiple-input multiple-output broadcast temporal channel correlation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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