| 基于空间位置的混合频谱共享系统功率分配研究简 |
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| 引用本文： | 蔡艳,张晶,朱洪波.基于空间位置的混合频谱共享系统功率分配研究简[J].通信学报,2014,35(2):14-110. |
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| 作者姓名： | 蔡艳 张晶 朱洪波 |
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| 作者单位： | 1. 南京邮电大学 通信与信息工程学院 江苏省无线通信重点实验室，江苏 南京 210003；
2. 南京邮电大学 电子科学与工程学院 江苏省无线通信重点实验室，江苏 南京 210003 |
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| 基金项目： | 国家重点基础研究发展计划（“973”计划）基金资助项目(2013CB329005)；江苏“973”基金资助项目(BK2011027）；国家自然科学基金资助项目(61101104，61271237)；南京邮电大学基金资助项目(NY211055) |
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| 摘 要： | 针对次用户空间位置分布的随机性，提出空域混合Overlay/Underlay频谱共享模型以提高无线频谱利用率。根据次用户在不同空间位置对主用户的干扰，在主用户干扰容限约束下推导出次用户工作于Overlay状态和Underlay状态的空间区域；以最大化系统容量为准则建立认知系统功率优化分配模型，推导出次用户的最优功率分配方案，进而得到认知系统可获得的最大容量；理论和仿真结果表明，基于空间位置的混合频谱共享系统可以获得比Overlay系统更高的容量。
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| 关 键 词： | 无线通信 频谱共享 认知无线电 功率分配 |
Power allocation of hybrid spectrum sharing
based on the spatial location |
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| Yan CAI,Jing ZHANG,Hong-bo ZHU.Power allocation of hybrid spectrum sharing
based on the spatial location[J].Journal on Communications,2014,35(2):14-110. |
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| Authors: | Yan CAI Jing ZHANG Hong-bo ZHU |
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| Affiliation: | 1. Key Laboratory of Wireless Communications of Jiangsu Province, College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;2. Key Laboratory of Wireless Communications of Jiangsu Province, College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China |
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| Abstract: | Based on the random spatial location of the secondary user, a spatial hybrid spectrum sharing model which combines overlay with underlay was proposed to improve spectrum utilization. Considering the different location of secondary user, the interference received by primary receiver was analyzed and the work regions of the overlay and underlay were deduced under the primary user average interference constraint. The power allocation model was built under the criterion of maximizing the system average (ergodic) capacity. Furthermore, the optimal power allocation scheme was deduced as well as the maximum achievable capacity of the spatial hybrid spectrum sharing system. Analysis and simulation results indicate the hybrid spectrum sharing system has higher capacity than single overlay system. |
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| Keywords: | wireless communication spectrum sharing cognitive radio power allocation |
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