锐截止中频采样滤波器的设计与实现  

Design and Implementation of the sharp cutting-off filter for IF sampling

作　　者：范红旗[1] 翟庆林[1] 王胜[1] 白森[2] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073 [2]中国空空导弹研究院,河南洛阳471009

出　　处：《电路与系统学报》2009年第5期31-36,共6页Journal of Circuits and Systems

摘　　要：中频采样是数字正交鉴相系统中的一项关键技术,具有锐截止特性的中频采样滤波器可以改善鉴相系统的性能。在分析锐截止特性FIR滤波器如何提升中频采样性能的基础上,针对低通滤波法鉴相系统中的滤波器设计,分析了简化滤波器设计的条件,并推导了滤波器的简化表示,从而提出了一种设计锐截止中频采样滤波器的有效方法,使得所需的运算量及存储量大幅度缩减。最后,提出了一种基于IP(Intelligent Property)核的中频采样滤波器的具体实现方案。As a key technology in the DOPD （Digital Orthographic Phase Discriminator） system, the IF Sampling filter with the sharp cutting-off transition band can improve the performance of the DOPD system. For the design of the low pass filter in the DOPD system with the low pass filtering method, the conditions of the simplifying the filter design are analyzed and the simplified expressions of filter are deduced, then a simplified sharp cutting-off filter design method is proposed which can remarkably reduce the multiply accumulate operations, as well as the consume of memory. Finally, a scheme with IP （Intelligent Property） core to implement IF Sampling filter is proposed.

关 键 词：正交鉴相 中频采样 锐截止 FIR IP核 

分 类 号：TN957.5[电子电信—信号与信息处理]