LIU Xin, SUN Da-jun, TENG Ting-ting, et al. A floating-point fractional time-delay filter based on SOCP[J]. 2014, 33(12): 101-103. DOI: 10.13873/J.1000-9787(2014)12-0101-03.
一种基于二阶锥规划的浮点分数时延滤波器
摘要
宽带图像声纳通常采用分数时延滤波器来提高时延精度。传统的分数时延滤波器基本采用Farrow定点结构
但其动态范围窄并且需要占用较多的硬件资源。为克服上述不足
提出了一种采用二阶锥规划(SOCP)算法进行分数时延滤波器系数设计
并以分布式算法为基础的浮点分布式时延滤波器。该滤波器具有计算精度高、动态范围大等优点
适于在FPCA上进行规模化应用。
Abstract
Fractional time-delay filter is the common implementation to promote time-delay precision of broadband sonar.Traditional fixed-point Farrow structure filter has narrow frequency band and requires more hardware resources.A kind of floating-point distributed time-delay filter based on SOCP is raised to overcome these shortages.It has advantages of high precision
wide dynamic range and more suitable for FPGA applications.