| 混合式频谱共享系统功率分配研究 |
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| 引用本文： | 张晶,朱洪波.混合式频谱共享系统功率分配研究[J].电子与信息学报,2010,32(11):2776-2780. |
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| 作者姓名： | 张晶 朱洪波 |
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| 作者单位： | 南京邮电大学无线通信重点实验室,南京,210003 |
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| 基金项目： | 国家973计划项目，国家863 计划项目，国家重大专项项目，江苏省研究生创新计划项目，东南大学毫米波实验室开放项目 |
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| 摘 要： | 该文结合机会式频谱共享(Overlay)与共存式频谱共享(Underlay)提出一种混合式频谱共享模型。基于提出的模型，考虑次用户理想感知和非理想感知两种情况，采用离散状态马尔科夫过程对信道活动进行建模，进而在平均容量最大化准则下分析了混合式频谱共享系统的功率分配问题，导出了次用户的最优功率分配策略及系统可获得的最大容量。理论和仿真结果表明，基于最优功率分配策略的混合式频谱共享系统可以获得比Overlay或Underlay系统更高的容量。
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| 关 键 词： | 无线通信 频谱共享 系统模型 信道活动模型 平均容量 功率分配 |
| 收稿时间： | 2009-12-01 |
On Power Allocation of Hybrid Spectrum Sharing |
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| Zhang Jing,Zhu Hong-bo.On Power Allocation of Hybrid Spectrum Sharing[J].Journal of Electronics & Information Technology,2010,32(11):2776-2780. |
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| Authors: | Zhang Jing Zhu Hong-bo |
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| Affiliation: | Key Lab of Wireless Communication in Jiangsu Province, Nanjing University of Posts and Telecommunications, Nanjing 210003, China |
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| Abstract: | This paper proposes a hybrid spectrum sharing model which combines Overlay with Underlay. Based on the proposed model, considering of perfect and imperfect spectrum sensing, it models the channel activity with discrete-state Markov process. Furthermore, under the criterion of maximizing the system average (ergodic) capacity, it analyzes the power allocation of the hybrid spectrum sharing and deduces the optimal power allocation scheme as well as the maximum achievable capacity of the system. Analysis and simulation results indicate the hybrid spectrum sharing is provided with higher capacity than single Overlay or Underlay system. |
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| Keywords: | Wireless communication Spectrum sharing System model Channel activity model Average capacity Power allocation |
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