Joint power allocation and subcarrier pairing in OFDM-based cooperative relaying system

被引：0

作者：

DAI Cui-qin

机构：

来源：

The Journal of China Universities of Posts and Telecommunications | 2012年 / 01期

基金：

中国国家自然科学基金; 国科技部“十一五”科技计划项目;

关键词：

OFDM; DF relaying; power allocation; SP; MR-SP&PA;

D O I：

暂无

中图分类号：

TN919.3 [数据传输技术]; TN925 [无线电中继通信、微波通信];

学科分类号：

080402 ; 080904 ; 0810 ; 081001 ;

摘要：

This paper proposes rate-maximized (MR) joint subcarrier pairing (SP) and power allocation (PA) (MR-SP&PA),a novel scheme for maximizing the weighted sum rate of the orthogonal-frequency-division multiplexing (OFDM) relaying system with a decode-and-forward (DF) relay.MR-SP&PA is based on the joint optimization of both SP and power allocation with total power constraint,and formulated as a mixed integer programming problem in the paper.The programming problem is then transformed to a convex optimization problem by using continuous relaxation,and solved in the Lagrangian dual domain.Simulation results show that MR-SP&PA can maximize the weighted sum rate under total power constraint and outperform equal power allocation (EPA) and proportion power allocation (PCG).

引用

页码：24 / 30

页数：7