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1. 浙江树人大学信息科技学院,浙江 杭州 310015
2. 杭州中威电子股份有限公司,浙江 杭州 310012
3. 常州大学信息科学与工程学院,江苏 常州 213164
[ "张瑞(1984−),女,浙江树人大学信息科技学院讲师,主要研究方向为信号处理、嵌入式系统应用。" ]
[ "史故臣(1983−),男,杭州中威电子股份有限公司研发总监、研发部门副总经理,主要研究方向为有线、无线通信系统以及高清视频图像处理。" ]
[ "刘半藤(1984−),男,博士,浙江树人大学信息科技学院副教授,主要研究方向为无损检测技术、异源数据融合技术。" ]
[ "陈友荣(1982−),男,博士,浙江树人大学信息科技学院副教授,常州大学信息科学与工程学院硕士生导师,主要研究方向为无线传感网、物联网。" ]
网络出版日期:2018-09,
纸质出版日期:2018-09-20
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张瑞, 史故臣, 刘半藤, 等. 基于韦伯分布函数的低复杂度变步长符号算法[J]. 电信科学, 2018,34(9):87-96.
Rui ZHANG, Guchen SHI, Banteng LIU, et al. Low-complexity variable step-size sign algorithm based on Weibull distribution function[J]. Telecommunications science, 2018, 34(9): 87-96.
张瑞, 史故臣, 刘半藤, 等. 基于韦伯分布函数的低复杂度变步长符号算法[J]. 电信科学, 2018,34(9):87-96. DOI: 10.11959/j.issn.1000-0801.2018223.
Rui ZHANG, Guchen SHI, Banteng LIU, et al. Low-complexity variable step-size sign algorithm based on Weibull distribution function[J]. Telecommunications science, 2018, 34(9): 87-96. DOI: 10.11959/j.issn.1000-0801.2018223.
针对OFDM系统中传统信道估计算法在冲击噪声环境中性能急剧下降的问题,提出了一种基于韦伯分布函数的顽健型变步长符号算法进行信道估计。在深入研究冲击噪声特性及韦伯分布函数性质的基础上,提出了采用估计误差绝对值的韦伯分布函数控制步长的低复杂度变步长符号算法。该算法在利用传统符号算法顽健性的基础上,采用估计误差的韦伯分布函数动态地改变迭代符号算法的步长,从而能够以较低的复杂度提高变步长符号算法在冲击噪声环境中的收敛速度。算法复杂度分析及仿真结果表明,在冲击噪声环境下所提算法相较于传统自适应滤波信道估计算法能够以更低的复杂度、更快的收敛速度达到相同的信道估计均方误差。
The performance of the traditional second-order statistics based channel estimation methods degrade seriously in the presence of impulsive noises.In order to deal with this problem
a Weibull distribution function based variable step-size sign algorithm for channel estimation under impulsive noises was proposed.The proposed method was robust against impulsive noises and it could improve the convergence speed of the sign algorithm with the Weibull distribution function based variable step-size method.Computational complexity analysis and simulation results demonstrate that the proposed algorithm can achieve the same steady-state estimation error with faster convergence speed and lower computational complexity.
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