| 基于OFDM的认知无线电功率分配方法研究 |
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| 引用本文： | 徐聪,宋志群,王荆宁. 基于OFDM的认知无线电功率分配方法研究[J]. 无线电工程, 2011, 41(1): 8-10 |
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| 作者姓名： | 徐聪 宋志群 王荆宁 |
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| 作者单位： | 中国电子科技集团公司第五十四研究所,河北,石家庄,050081 |
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| 摘 要： | 针对认知无线电(Cognitive Radio,CR)需要提高频谱利用率,而正交频分复用(Orthogonal FrequencyDivision Multiplexing,OFDM)技术系统中针对子载波的功率分配算法计算复杂度高的缺点,对认知无线电中的频谱资源和功率分配方法进行了研究。提出了一种将整个信道分为多个子载波块进行功率分配的算法,该算法结合频谱检测和信道估计的结果,选取可用的通信频段并采用注水算法为每一个子载波段分配功率,并通过自适应调制实现吞吐量最大化。仿真结果表明,该算法可以有效提高频谱利用效率。
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| 关 键 词： | 认知无线电 正交频分复用 功率分配 注水算法 |
Research on Power Allocation Method in Cognitive Radio Based on OFDM |
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| XU Cong,SONG Zhi-qun,WANG Jing-ning. Research on Power Allocation Method in Cognitive Radio Based on OFDM[J]. Radio Engineering of China, 2011, 41(1): 8-10 |
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| Authors: | XU Cong SONG Zhi-qun WANG Jing-ning |
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| Affiliation: | XU Cong,SONG Zhi-qun,WANG Jing-ning(The 54th Research Institute of CETC,Shijiazhuang Hebei 050081,China) |
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| Abstract: | Cognitive Radio requires improving spectrum utilization,and for the complexity of subcarrier power allocation algorithm in OFDM system,spectrum resources allocation method and power allocation method in Cognitive Radio are researched.A power allocation method which plots the entire channel into multiple subcarrier segments is proposed.Based on the result of spectrum detection and channel estimation,selecting the spectrum segments which can be used and using the water-filling algorithm to allocate power,it g... |
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| Keywords: | cognitive radio OFDM power allocation water-filling algorithm |
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