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The Waterfilling Based Subcarrier and Power Allocation for OFDM Cognitive Radio Networks

机译：基于水填充的OFDM认知无线电网络的子载波和功率分配

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In this paper, the subcarrier and power allocation problem for the orthogonal frequency division multiplexing (OFDM) cognitive radio network which coexists with the primary network is studied. Specifically, in consideration of both transmit power constraints of secondary users and interference power constraint at each primary receiver. A cognitive waterfilling (CWF) power allocation algorithm which based upon the classical waterfilling mechanism is proposed for the single SU and multi-PU scenario. As for the multi-SU and multi-PU case, we present an efficient joint subcarrier and power allocation algorithm called MS-CWF algorithm with low complexity. Simulation results show the effectiveness of the proposed CWF and MS-CWF algorithms.
机译：本文研究了与主网络共存的正交频分复用（OFDM）认知无线电网络的子载波和功率分配问题。具体地，考虑到辅助用户的发射功率约束和每个主接收器处的干扰功率约束。基于经典水填充机构的认知水填充（CWF）功率分配算法是针对单一SU和多PU场景的基于经典的水填充机构。至于多苏和多PU案例，我们介绍了一种具有低复杂性MS-CWF算法的有效的关节子载波和功率分配算法。仿真结果表明了所提出的CWF和MS-CWF算法的有效性。

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