Resource Allocation for the AF Multiple Access Relay Channel with OFDMA

被引：0
作者：
Schedler, Stephan [1 ]
Angierski, Andre [1 ]
Kuehn, Volker [1 ]
机构：
[1] Univ Rostock, Inst Commun Engn, D-18055 Rostock, Germany
来源：
2012 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC) | 2012年
关键词：
POWER ALLOCATION; OPTIMIZATION; SUBCARRIER;
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper considers the resource allocation problem for a Multiple Access Relay Channel (MARC). A transmission scheme with OFDMA and Amplify-and-Forward (AF) relaying is assumed. To maximise the sum rate a joint allocation of transmit power and subcarriers has to be done. This problem is known to be NP-hard and can only be solved by an exhaustive search which is not feasible for practical problem sizes. Different near-optimum algorithms for solving this problem are proposed. The problem of carrier and power allocation can either be done separately or jointly. For example a straight forward gradient method can be applied if the constraints of the allocation problem are relaxed. The obtained solution tends to fulfil the original constraints and it is also shown to be nearly optimum. The performance of all algorithms is evaluated by numerical simulations. Furthermore, their complexities are analysed and compared.
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页数：6
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