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在基于正交频分复用的多载波两跳中继系统中有两个关键的问题亟需解决:子载波间的功率分配和子载波配对.子载波功率分配和配对之间存在复杂的耦合关系,通过现有的方法对子载波功率分配和配对进行联合优化比较困难.在深入研究这种耦合关系的基础上,针对解码转发,利用凸优化思想,提出一种功率受限下的子载波配对和功率分配联合最优算法.仿真结果表明,本算法可以有效提升中继系统的系统容量.
There are two key problems in orthogonal frequency division multiplexing based multi-carrier two-hop relay systems that need to be addressed: power allocation and subcarrier pairing between subcarriers. There is a complex coupling relationship between subcarrier power allocation and pairing , It is difficult to jointly optimize subcarrier power allocation and pairing through the existing methods.On the basis of further research on this coupling relation, aiming at decoding and forwarding, using the idea of convex optimization, a subcarrier pairing with limited power is proposed And power allocation joint optimal algorithm.The simulation results show that this algorithm can effectively improve the system capacity of the relay system.