Capacity in fading environment based on soft sensing information under spectrum sharing constraints

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• 作者：Indu Bala ; Manjit Singh Bhamrah ; Ghanshyam Singh
• 关键词：Cognitive radio ; Fading ; Spectrum sensing ; Spectrum sharing ; Power adaptation ; Ergodic channel capacity
• 刊名：Wireless Networks
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：23
• 期：2
• 页码：519-531
• 全文大小：
• 刊物类别：Computer Science
• 刊物主题：Communications Engineering, Networks; Computer Communication Networks; Electrical Engineering; IT in Business;
• 出版者：Springer US
• ISSN：1572-8196
• 卷排序：23

文摘

In this paper, the ergodic channel capacity for a secondary user is investigated using soft sensing information about primary user activity in a shared channel under joint peak transmit power and average received interference power constraints for Nakagami-m fading channel. The results of the proposed power adaptation scheme illustrate the effect of communication environment parameters and soft sensing information about primary user activity on the channel capacity of secondary user. In particular, the effect of cross link channel state information to maximize the channel capacity for the power adaptation scheme is emphasized by considering the Lagrangian optimization problem for joint peak transmit power and average interference power constraints. Moreover, the performance of the primary user is also investigated considering the interference of the secondary user to the primary in spectrum sharing environment in terms of transmission rate and average channel capacity.