公开(公告)号：US4192008A

公开(公告)日：1980-03-04

申请号：US935873

申请日：1978-08-23

Applicant: Gordon J. Mandeville

Inventor： Gordon J. Mandeville

IPC: H03H17/02 ,  G06F15/34 ,  H03H7/10

CPC classification number: H03H17/0201

Abstract: The wave digital filter derived from a symmetric lattice reference filter includes two one-port networks each of which consists of storage elements interconnected by arithmetic units. Each arithmetic unit comprises a digital multiplier and three digital adders. Higher order filters thus require a substantial amount of arithmetic hardware. In accordance with the present invention, the amount of arithmetic hardware in the wave digital filter derived from a symmetric lattice filter is substantially reduced by multiplexing an arithmetic unit in each one-port network. In particular, a single arithmetic unit in each one-port is successively configured as each individual arithmetic unit of the non-multiplexed one-port. Intermediate output signals are stored in temporarily vacant storage elements. In one described embodiment of the present invention, the two multiplexed one-port networks of the wave digital filter are further multiplexed to require only one arithmetic unit.

Abstract translation: 从对称网格参考滤波器导出的波数字滤波器包括两个单端口网络，每个网络由存储元件组成，这些存储元件由算术单元互连。 每个算术单元包括数字乘法器和三个数字加法器。 因此，高阶滤波器需要大量的算术硬件。 根据本发明，通过对每个单端口网络中的算术单元进行多路复用，从对称网格滤波器导出的波数字滤波器中的算术硬件量大大降低。 特别地，每个单端口中的单个算术单元被连续配置为非多路复用单端口的每个单独运算单元。 中间输出信号存储在临时空的存储元件中。 在本发明的一个描述的实施例中，波数字滤波器的两个多路复用单端口网络被进一步多路复用以仅需要一个算术单元。