摘要
卫星导航信号通道线性失真可以简化建模为FIR复滤波器,对2阶复滤波器的研究有助于分析通道特性并寻求补偿方法。文章分析了几种2阶FIR滤波器结构的特性,评估了对资源的消耗,并以TD-Alt BOC卫星导航信号为例分析了从基带信号生成、2阶滤波器滤波、带限滤波过程的信号恶化。2阶复滤波器本身的分析和设计对导航信号生成、质量评估、通道失真补偿有重要意义,而复滤波器在作用于TD-Alt BOC信号时不同于一般导航信号的特点也被展示出来。
Satellite navigation signal channel linear distortion can be simplify modeled as a complex FIR filter, so the research of 2 order complex FIR filter is important to analyze the channel characteristics and seek the solutions. This paper analyses the characteristics of several kinds of 2 order complex FIR filter, taking TD-AltBOC signal as an example to analyze the signal worsening produced by baseband signal , 2 order filter and band limited filter. The analysis and design is important for signal generation, quality evaluation and compensation, and the difference between TD-AltBOC and other navigation signal also is displayed.
出处
《空间电子技术》
2015年第6期61-66,共6页
Space Electronic Technology
