Pseudo-median Filter with Enhancing Impulse Suppression

摘要：

Pseudo-median filter is a computationally efficient alternative to median filter that applicable to data processing in low-level hardware platform of wireless sensor network nodes. In order to make the pseudo-median filter be able to remove impulses as does median filter and maintain the advantages of performance, a kind of improved pseudo-median filter algorithm with impulsive noise detecting and suppressing is proposed in this paper. By contrasting the increment of the maximum of the minima and the increment of the minimum of the maxima relative to the level of current filtering signal within the filtering window, the impulse can be detected and the output of signal polluted by the impulse is substituted by approximation. The simulation results and calculation complexity analysis show the improved algorithm obviously enhances the ability of impulseattenuation and is a higher efficient alternative to median filter for the application in wireless sensor network.

关键词： Pseudo-median filter Median filter Impulse detecting and suppressing Increment comparing Wireless sensor network

作者: Shaoqiang Liu Lei Chen Xiaoping Fan Zhihua Qu Xi Yang

作者单位: School of Information Science and EngineeringCentral South UniversityChangsha,Hunan,China,410075 School of Information Beijing Wuzi University Beijing,China,101149

会议类型: 国际会议

会议名称: 2010 IEEE信息与自动化国际会议(ICIA 2010)

会议地点: 哈尔滨

会议语种:英文

页码: 1-5

在线出版日期: 2010-06-20（万方平台首次上网日期，不代表论文的发表时间）