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基于认知无线电的NC-OFDM系统HPA非线性的研究

Research on High Power Amplifier Nonlinearity for Non-continuous OFDM System Based on Cognitive Radio
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摘要 研究了高功率放大器(HPA)非线性对非连续OFDM(NC-OFDM)信号的影响,给出了基于认知无线电的NC-OFDM系统模型,并仿真分析了主用户(PU)频带干扰温度与NC-OFDM系统HPA参数、频带占用率、子信道间隔、保护载波数量等系统参数的关系,结果表明,HPA的IBO参数和PU频带占用率是决定PU频带干扰的主要因素,而且单纯依靠增加保护载波和子信道间隔对PU频带干扰温度的改善是有限的。所得结论可为NC-OFDM系统中预失真、旁瓣抑制及功率分配等算法的研究提供参考。 This paper studies the influence of high power amplifier（HPA） nonlinearity on non -continuous OFDM（NC- OFDM） signal, and analyzes the relationship between primary user（PU） interference temperature and NC -OFDM system parameters including HPA, PU band occupancy, cognitive radio user （CU） subcarrier space and the number of guard subcarriers. The results show that the IBO of HPA and PU band occupancy decide the PU interference temperature, but the improvement is limited only by increasing guard subcarriers and subearrier space. The conclusion can guide further research on pre - distortion, side -lobe suppression and power allocation.
作者 朱春华 杨守义 穆晓敏 齐林
机构地区 郑州大学信息工程学院 河南工业大学信息科学与工程学院
出处 《电讯技术》 北大核心 2010年第1期37-41,共5页 Telecommunication Engineering
基金 教育部科学技术研究重点项目(208083) 河南省重点攻关项目(082102210013)~~
关键词 认知无线电 高功率放大器 非连续OFDM 非线性 cognitive radio （CR） high power amplifier（HPA） NC - OFDM nonlinearity
分类号 TN914 [电子电信—通信与信息系统]
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参考文献10

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