Power Allocation in OFDM-Based Cognitive Relay Networks

摘要：

This paper investigates power allocation in OFDMbased cognitive relay networks. Relay-assisted cognitive radio network (RCRN) combines diversity gain with spectral sharing technique and improves the spectrum utilization efficiency. A secondary user (SU) shares radio resources of a primary user (PU) under the condition that interferences from SU to PU is below a specific threshold. We formulate a power allocation optimization problem that maximizes the spectral efficiency of RCRN under total transmit-peak and total transmit-average interference power constrains. Numerical results show that RCRN provides significant performance improvement over single hop CRN (SCRN).

关键词： RCRN waterfilling spectral efficiency peak and average interference and power allocation.

作者: M. Shamim Kaiser Kazi M. Ahmed Raza Ali Shah

作者单位: Asian Institute of Technology, Thailand School of gineering and Technology, Asian Institute of Technology, Pathumthani, Thailand Information and Communications Technologies from AIT, Thailand

会议类型: 国际会议

会议名称: 2010 IEEE International Conference Conferenhce on Wireless Communications,Networking and Information Security(2010 IEEE 无线通信、网络技术与信息安全国际会议 WCNIS)

会议地点: 北京

会议语种:英文

页码: 1-5

在线出版日期: 2010-06-25（万方平台首次上网日期，不代表论文的发表时间）