X波段雷达中基于高阶色散关系的滤波器设计  

Filter Design Based on Higher-order Dispersion Relation in X-band Marine Radar

作　　者：沈继红[1] 李英 王淑娟[1] 戴运桃[1] 王晓莺[1] 

机构地区：[1]哈尔滨工程大学理学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《中国航海》2012年第4期4-7,共4页Navigation of China

基　　金：国家自然科学基金(51109041);国防项目(153110500002)

摘　　要：由于在X波段雷达海浪参数反演过程中,利用已有的带通滤波器反演得到的波高、波周期等参数会出现偏大的问题,提出了一种将高阶色散关系边界与基本色散关系相结合的新滤波器。首先推导证明出高阶色散关系的单调性和有界性,得到其边界方程;其次,结合基本色散关系得到新的滤波器;最后进行仿真实验,并与原带通滤波器的结果进行对比。实验结果表明,新的滤波器不仅能够准确的提取海浪信息,滤除掉噪声信息,而且得到的波高、周期及波向等参数结果优于原带通滤波器。In the parameter inversion process of wave signals from an X-band radar,the ordinary band-pass filter gives overestimate of the wave height and wave period.A new band-pass filter that combines fundamental dispersion relation with higher order boundary relation is proposed.The monotonicity and boundedness of the higher order dispersion relation is proved,and the boundary equation derived.A new filter which combines the equation with the fundamental dispersion relation is designed.The comparison between two kinds of filters is conducted through simulation experiments.The results show that the new filter is able to extract the wave information more accurately from noisy signal and give better estimates of significant wave height,wave period and wave direction.

关 键 词：船舶、舰船工程 X波段雷达 带通滤波 高阶色散关系 有效波高 波周期 

分 类 号：U665.22[交通运输工程—船舶及航道工程] TN957.5[交通运输工程—船舶与海洋工程]