| 一种适用于高阶QAM系统Bussgang类盲均衡新方法 |
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| 引用本文： | 阮秀凯, 蒋啸, 李昌. 一种适用于高阶QAM系统Bussgang类盲均衡新方法[J]. 电子与信息学报, 2012, 34(8): 2018-2022. doi: 10.3724/SP.J.1146.2011.01403 |
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| 作者姓名： | 阮秀凯* 蒋啸 李昌 |
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| 作者单位： | 1. 温州大学物理与电子信息工程学院温州325035
2. 南京邮电大学自动化学院南京210046 |
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| 基金项目： | 国家自然科学基金青年项目(61001067)资助课题 |
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| 摘 要： | 该文提出一种适用于高阶QAM系统的新Bussgang类多模盲均衡算法。将新的代价函数与星座匹配误差函数结合，给出一种瞬时双模切换混合算法，然后设计了一种基于判决圆的模式切换准则，从而达到进一步有效降低新算法稳态误差的效果。最后，仿真结果以高阶256QAM信号为例，验证了该算法对于高阶QAM信号的盲均衡能力和良好效果。
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| 关 键 词： | 无线通信 盲均衡 正交幅度调制 Bussgang 瞬时双模切换 |
| 收稿时间： | 2011-12-29 |
| 修稿时间： | 2012-03-14 |
A Novel Method of Bussgang-type Blind Equalization in High-order QAM Systems |
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| Ruan Xiu-Kai, Jiang Xiao, Li Chang. A Novel Method of Bussgang-type Blind Equalization in High-order QAM Systems[J]. Journal of Electronics & Information Technology, 2012, 34(8): 2018-2022. doi: 10.3724/SP.J.1146.2011.01403 |
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| Authors: | Ruan Xiu-kai Jiang Xiao Li Chang |
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| Affiliation: | Ruan Xiu-kai① Jiang Xiao② Li Chang① ①(College of Physics and Electronic Information Engineering,Wenzhou University,Wenzhou 325035,China) ②(College of Automation,Nanjing University of Posts and Telecommunications,Nanjing 210046,China) |
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| Abstract: | A novel multi-modulus method of Bussgang-type blind equalization algorithm in higher-order Quadrature Amplitude Modulation(QAM) systems is proposed.To reduce the steady-state error effectively,an instantaneous switch-mode hybrid algorithm whose associative cost function is formulated by the novel cost function and the Constellation Matched Error(CME) is proposed,and a criterion of circular mode switching decision is designed.Finally,256-QAM signal is used to simulate,all of these results verify the proposed blind equalization algorithm can achieve good performance in high-order QAM systems. |
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| Keywords: | Wireless communication Blind equalization Quadrature Amplitude Modulation(QAM) Bussgang Instantaneous switch |
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