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应用科学学报 ›› 2009, Vol. 27 ›› Issue (5): 459-462.

• 通信工程 • 上一篇    下一篇

简化B类噪声模型的参数估计

张曙霞;蒋宇中   

  1. 海军工程大学电子工程学院，武汉430033
  • 收稿日期:2009-03-20 修回日期:2009-07-05 出版日期:2009-09-25 发布日期:2009-09-25
  • 通信作者: 蒋宇中，博士，教授，研究方向：甚低频通信相关技术研究、低频大气噪声建模等，E-mail: jiangyuzhong@tsinghua.org.cn

Parameter Estimation for Simplified Class B Noise Model

  1. College of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China
  • Received:2009-03-20 Revised:2009-07-05 Online:2009-09-25 Published:2009-09-25

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摘要：

 通信接收机的前置窄带滤波器波改变了非高斯脉冲噪声的幅度统计特性，B类噪声模型可以很好地描述窄带非高斯噪声幅度概率分布. 该文提出一种基于特征函数谱的B类噪声模型参数估计算法，其特点是采用最小均方梯度法求非线性代价函数的解. 计算机仿真验证结果表明：该算法具有快速收敛和复杂度低的优点，并给出了算法的详细推导过程.

关键词: 非高斯噪声, B类噪声, 参数估计

Abstract:

The amplitude probability distribution (APD) of impulse noise can be changed when input single of communication receiver is filtered using a narrow-band filter. It is verified that the Middleton’s Class B model can be made to fit the APD of narrow bandwidth non-Gaussian noise. In this paper, the efficient estimation of the Class B model parameters based on characteristic function with least square gradient method is derived. The considered estimator has fast convergence and low computational complexity, with performance approaching theoretical up-limit for large data samples. Derivation of the estimator for the noise model parameters, and simulation results using this estimator with three unknown parameters are presented.

Key words: non-Gaussian noise, class B noise, parameters estimation

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