摘要
在现有的以理想信道感知为条件的机会频谱共享容量分析基础上,重点讨论非理想感知对机会频谱共享中次用户信道容量的影响。关注两条不同传输途径的信道,一条是从次用户发送端到次用户接收端的无线信道,另一条是次用户发送端到主用户接收端的无线信道。以主用户接收端功率受限作为约束条件,得到了关于非理想信道信号噪声比条件下机会频谱共享的次用户信道容量的关系表达式。首先分析次用户发送端到主用户接收端信道和次用户发送端到次用户接收端信道为非对称时次用户的信道容量,其次分别探讨不同衰落信道模型下两条信道上感知(包括信道估计和预测)误差为对称和非对称结果时,次用户信道容量的变化。
In this paper,we propose a channel capacity theory of a secondary user in cognitive networks with imperfect channel sensing information,which is a integrity and complement of the current channel capacity theory. Two channels are concerned. One is the channel between the secondary transmitter and the secondary receiver. The other is the channel between the secondary transmitter and the primary receiver. First,we quantify the channel capacity under dissymmetrical channel conditions. Second, we give expressions of channel capacity by introducing channel sensing errors. Finally, we evaluate the channel capacities under dissymmetrical and symmetrical results of channel sensing errors, respectively. And compare the results under different fading distributions.
出处
《南京邮电大学学报（自然科学版）》
2009年第4期14-19,共6页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
基金
国家重点基础研究发展计划(973计划)(2007CB310600)
国家自然科学基金重点项目(60432040)
国家自然科学基金(60572024)
教育部博士点基金(20050293003)
中国博士后基金(0080441067)
江苏省博士后基金(0802017B)
国家高技术研究发展计划(863计划)重点项目(2009AA011300)资助项目
关键词
信道容量
信道感知
频谱共享
频谱感知
channel capacity
channel sensing
spectrum-sharing
spectrum sensing
