CAJ | 학술논문

针对正交频分多址接入-解码转发(OFDMA-DF)中继系统,提出了以最大化系统加权和速率为目标的子载波分配、功率分配、传输方式选择和中继选择联合优化问题. 基于凸优化理论,提出了一种最优资源分配算法,其复杂度仅与子载波数成线性关系. 理论分析和仿真结果表明,结合用户权重的调整,该算法既可实现资源分配的公平性,又可有效利用中继节点的能力,提高系统容量.
침대정교빈분다지접입-해마전발(OFDMA-DF)중계계통,제출료이최대화계통가권화속솔위목표적자재파분배、공솔분배、전수방식선택화중계선택연합우화문제. 기우철우화이론,제출료일충최우자원분배산법,기복잡도부여자재파수성선성관계. 이론분석화방진결과표명,결합용호권중적조정,해산법기가실현자원분배적공평성,우가유효이용중계절점적능력,제고계통용량.
The problems of the joint subcarrier allocation, power allocation, transmission mode selection and relay selection optimization which maximizes the weighted sum rate are addressed in orthogonal frequency division multiple access-based decode-and-forward(OFDMA-DF) relaying systems. Based on convex optimization theory, an optimal resource allocation algorithm is proposed. The complexity of this algorithm is only linear in the number of subcarriers. Simulation demonstrates that the scheme can achieve not only fair resource allocation but also effective relay utilization that enhances the system capacity through adjusting weighting factors for each user.