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| 基于频谱感知信息的认知无线电网络功率密度约束问题 | |
| 引用本文： | 何世彪,苏志广,敖仙丹,等.基于频谱感知信息的认知无线电网络功率密度约束问题[J].重庆邮电大学学报(自然科学版),2008,20(2):127-131. |
| 作者姓名： | 何世彪 苏志广 敖仙丹 等 |
| 作者单位： | 1. 重庆交通大学,计算机与信息学院,重庆,400074;重庆通信学院,重庆,400035 2. 重庆通信学院,重庆,400035 3. 空军通信训练基地,保定,071051 |
| 摘 要： | 通过机会式地共享已分配的授权频谱，认知无线电技术可以极大地提高频谱的利用率，解决目前频谱资源日益匮乏的难题。当认知无线电网络与传统的通信网络共存时，首先要保证不会对传统的通信系统产生有害的干扰。为此，就需要考虑认知无线电网络中节点的配置密度，使得其对传统用户（主用户）的干扰低于干扰温度的容限。针对此问题考虑了多个认知用户组网时的最大可达到的功率密度问题,在认知用户与主用户间的距离参数未知条件下，将此距离用认知用户检测到的本地信噪比等价表示，获得了认知用户在不同检测概率条件下的可允许的最大功率密度约束条件，并给出了仿真结果。 |
| 关 键 词： | 频谱感知 认知无线电 功率控制 干扰温度 |
| 文章编号： | 1673-825X(2008)02-0127-05 |
| 收稿时间： | 2007/12/13 0:00:00 |
| 修稿时间： | 2007年12月13 |
Constraints of allowable power density for cognitive radio network based on spectrum sensing information |
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| HE Shi-biao,SU Zhi-guang,AO Xian-dan,WU Quan-sheng.Constraints of allowable power density for cognitive radio network based on spectrum sensing information[J].Journal of Chongqing University of Posts and Telecommunications,2008,20(2):127-131. | |
| Authors: | HE Shi-biao SU Zhi-guang AO Xian-dan WU Quan-sheng |
| Institution: | Computer and Information School, Chongqing Jiaotong University, Chongqing 400074, P.R.China |
| Abstract: | Cognitive radio technology can improve the spectrum utilization greatly by sharing spectrum allocated to primary users opportunistically. When cognitive radio coexists with primary system, it mustn't cause excessive interference to legacy users. Hence, power density for cognitive radio users must be considered to guarantee that the interference to primary users is less than the interference temperature limitations. The scenario of multiple cognitive radio interference to primary users are considered, and the constraints that allow multiple cognitive radios to transmit at reasonable power levels with different missing probability while maintaining a guarantee of service to legacy users on the same band are gained. Meanwhile, the simulation results are shown. |
| Keywords: | spectrum sensing cognitive radio power control interference temperature |
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