罗兰C接收机的数字带通滤波器的设计  

Digital Bandpass Filter Design of Loran-c Receiver

作　　者：刘丙伟[1] 汪学刚[1] 

机构地区：[1]电子科技大学,四川成都611731

出　　处：《全球定位系统》2011年第6期50-53,共4页Gnss World of China

摘　　要：根据罗兰C信号的特点,设计直接FIR滤波器,在直接FIR滤波器的基础上介绍插值滤波器设计方法,根据罗兰C信号的频谱特性设计出满足要求的插值滤波器,通过比较发现:在相同的参数下,插值滤波器比直接FIR滤波器节省了很大的阶数,体现在运算量和资源占用量,在工程应用上有很大的优势,而且所要求的频带越窄,采样率越大,节省资源的百分比就越大。A design of direct FIR filter according to the character of loran C signal is presetend.On the basis of FIR filter,the way of designing interpolated FIR filter is introduced,and frequency chart in the following part is showen.With the comparing of these two filters,we can find that interpolated FIR filter save many taps in the form of computational workloads and resource occupancy,and it has a large disadvantage in project application.Moreover,the more narrow of the band we need and the more of the sampling frequency,the more resource it saves.

关 键 词：罗兰C信号 直接FIR滤波器 插值滤波器 计算量 

分 类 号：TN966[电子电信—信号与信息处理]