计算机科学 ›› 2015, Vol. 42 ›› Issue (4): 56-59.doi: 10.11896/j.issn.1002-137X.2015.04.009
王振朝,马明磊,李 延
WANG Zhen-chao, MA Ming-lei and LI Yan
摘要： 研究了基于单载波频分多址(SC-FDMA)的宽带认知无线电网络中非授权用户(NU)的最优功率分配(OPA)问题。首先给出了基于SC-FDMA的宽带认知无线电网络中非授权用户对授权用户的干扰功率模型。在此基础上,分别在下述两种约束条件下利用凸优化理论推导出了两种使非授权用户的和速率最大的最优功率分配(OPA)算法。约束条件一为:任一非授权用户的任一子载波对授权用户的干扰功率受限(IPCs)；约束条件二为:所有非授权用户的所有子载波对授权用户的干扰功率受限(IPC)。仿真结果表明,与等功率分配(EPA)和传统最优功率分配(C-OPA)算法相比,所提出的算法显著提高了非授权用户的可达和速率。
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