Cognitive full-duplex relay networks under the peak interference power constraint of multiple primary users

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• 作者：Xuan-Toan Doan ; Nam-Phong Nguyen ; Cheng Yin&#8230
• 关键词：Cognitive radio networks ; Full ; duplex ; Decode ; and ; forward ; Performance analysis
• 刊名：EURASIP Journal on Wireless Communications and Networking
• 出版年：2017
• 出版时间：December 2017
• 年：2017
• 卷：2017
• 期：1
• 全文大小：877KB
• 刊物主题：Signal,Image and Speech Processing; Communications Engineering, Networks; Information Systems Applications (incl.Internet);
• 出版者：Springer International Publishing
• ISSN：1687-1499
• 卷排序：2017

文摘

This paper investigates the outage performance of cognitive spectrum-sharing multi-relay networks in which the relays operate in a full-duplex (FD) mode and employ the decode-and-forward (DF) protocol. Two relay selection schemes, i.e., partial relay selection (PRS) and optimal relay selection (ORS), are considered to enhance the system performance. New exact expressions for the outage probability (OP) in both schemes are derived based on which an asymptotic analysis is carried out. The results show that the ORS strategy outperforms PRS in terms of OP, and increasing the number of FD relays can significantly improve the system performance. Moreover, novel analytical results provide additional insights for system design. In particular, from the viewpoint of FD concept, the primary network parameters (i.e., peak interference at the primary receivers, number of primary receivers, and their locations) should be carefully considered since they significantly affect the secondary network performance.