Carter S E, Malocha D C
Dept. of Electr. and Comput. Eng., Central Florida Univ., Orlando, FL.
IEEE Trans Ultrason Ferroelectr Freq Control. 1997;44(2):386-98. doi: 10.1109/58.585123.
A critical parameter in any finite impulse response (FIR) design is the impulse response length, which must be optimized for the given design specifications in order to reduce the size of the filter. To this end, many design algorithms have been introduced, such as Remez exchange, linear programming, and least mean squares. A new algorithm has been derived that is simple, efficient, and accurate for the design of arbitrary filter specifications and requires fewer computations than many other FIR approaches. This paper provides the definition of the basic functions used for the design process. An overview of the design process is given and the design technique used to design filters with tailored passband and stopband responses to yield a near-optimum time length is presented. This design can be very useful when compensating for the effects of a second transducer or other second order effects in surface acoustic wave (SAW) devices. The effects of monotonically increasing sidelobes on the impulse response length are discussed and illustrated. The addition of arbitrary phase response to the filter design process is discussed. The results of the current FIR approach are discussed and compared with other design techniques.
在任何有限脉冲响应（FIR）设计中，一个关键参数是脉冲响应长度，为了减小滤波器的尺寸，必须针对给定的设计规格对其进行优化。为此，已经引入了许多设计算法，如雷米兹交换法、线性规划法和最小均方误差法。已经推导出一种新算法，它对于任意滤波器规格的设计简单、高效且准确，并且与许多其他FIR方法相比所需的计算量更少。本文给出了设计过程中使用的基本函数的定义。给出了设计过程的概述，并介绍了用于设计具有定制通带和阻带响应以产生接近最优时间长度的滤波器的设计技术。在补偿表面声波（SAW）器件中第二个换能器的影响或其他二阶效应时，这种设计可能非常有用。讨论并说明了单调增加的旁瓣对脉冲响应长度的影响。讨论了在滤波器设计过程中添加任意相位响应的问题。讨论了当前FIR方法的结果，并与其他设计技术进行了比较。
