| 唐礼,赵楠,殷洪玺.一种基于干扰对齐的用户选择与功率优化算法[J].,2016,56(2):170-175 |
| 一种基于干扰对齐的用户选择与功率优化算法 |
| An algorithm for user selection and power optimization based on interference alignment |
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| DOI：10.7511/dllgxb201602009 |
| 中文关键词: 干扰对齐 用户选择 干扰温度 功率优化分配 |
| 英文关键词: interference alignment(IA) user selection interference temperature power optimization allocation |
| 基金项目:国家自然科学基金资助项目(61201224)；中国博士后科学基金特别资助项目(2013T60282). |
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| 中文摘要: |
| 在实际的认知无线电网络中，用户随机分布，各个用户间距离不相等，非授权用户较多，授权用户未被利用频谱资源有限，针对上述情况提出了一种基于干扰对齐的用户选择与功率优化算法．根据各个用户的位置关系，选出离授权用户较远的一组非授权用户进行通信，离授权用户较近的一组用户在该时隙静止，当非授权用户满足授权用户的干扰温度约束条件时，该算法通过对通信的非授权用户进行功率优化分配，提升系统的总容量．仿真分析表明，该算法能够在保证授权用户性能的同时，选出离授权用户较远的一组非授权用户进行通信，优化频谱效率． |
| 英文摘要: |
| In practical cognitive radio (CR) networks, users are always randomly located in an area, and the distance between each user is not equal. There are many secondary users(SU) in a certain area, but the spectrum resources of primary user (PU) are limited. For that situation, a user selection and power optimization algorithm in CR network based on interference alignment (IA) is proposed. According to the position of each user, the proposed algorithm chooses the farther SUs to communicate while the closer SUs to be idle in this time slot. When SUs satisfy the interference temperature constraints of PU, the algorithm improves the spectrum-efficiency through the power optimization allocation among the communicating SUs. Simulation results show that the proposed algorithm can effectively choose the farther SUs to communicate and optimize spectrum-efficiency under the insurance of the PU′s performance. |
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