Adaptive Unbalanced Spectrum Usage and Power Allocation for Cognitive OFDM-Based Relay Networks

被引：0
|
作者：
Gao, Long [1 ]
Lv, Tiejun [1 ]
Liu, Weidong [1 ]
Wang, Wei [1 ]
Liu, Biao [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Sch Informat & Commun Engn, Beijing 100876, Peoples R China
来源：
2009 5TH INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS, NETWORKING AND MOBILE COMPUTING, VOLS 1-8 | 2009年
关键词：
DIVERSITY; RADIO;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A cognitive OFDM-based relay network is considered in this paper. Communication between any node pair occurs on a spectrum pool of OFDM subcarriers where the subcarriers are not used by primary users. Therefore, the available spectrum for different transmitter-receiver pairs is distinct due to their location difference and so on. To satisfy different traffic demand and improve system performance, an adaptive unbalanced spectrum usage scheme is proposed. Moreover, to obtain the system maximum throughput, the optimal power allocation problem is formulated under the total power constraint based on the presented spectrum usage scheme. Simulation results show the proposed scheme is very effective.
引用
收藏
页码：1657 / 1660
页数：4
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