Relay and Power Allocation Schemes for OFDM-Based Cognitive Radio Systems

被引：57

作者：

Bharadia, Dinesh ^{[1
,2
]}

Bansal, Gaurav ^{[2
,3
]}

Kaligineedi, Praveen ^{[2
]}

Bhargava, Vijay K. ^{[2
]}

机构：

[1] Stanford Univ, Stanford, CA 94305 USA

[2] Univ British Columbia, Vancouver, BC V5Z 1M9, Canada

[3] Toyota InfoTechnol Ctr Co Ltd, Mountain View, CA USA

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2011年 / 10卷 / 09期

基金：

加拿大自然科学与工程研究理事会;

关键词：

OFDM; spectrum management; cognitive radio; power allocation; relay allocation; convex optimization;

D O I：

10.1109/TWC.2011.072011.101665

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：

In this letter, we investigate the relay and power allocation problem for OFDM-based cognitive radio (CR) systems with single antennae. We propose a method where the capacity of CR user employing relays is maximized while total transmission power is kept within a budget and the interference introduced to the primary user (PU) band is kept within a prescribed threshold. The optimization problem is a mixed-integer problem, which is NP-hard. Hence in this letter, we have proposed three sub-optimal schemes. The presented numerical results show that the performance of proposed suboptimal schemes is close to the optimal solution.

引用

页码：2812 / 2817

页数：6

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