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BINARY AMPLITUDE, DISCRETE TIME, DIGITAL GAUSSIAN PREMODULATION FILTER

IP.com Disclosure Number: IPCOM000006262D
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2001-Dec-19
Document File: 3 page(s) / 164K

Publishing Venue

Motorola

Related People

Authors:
James M. Keba

Abstract

The counter is clocked at N (N=32 for examples in this document) times the bit rate. The counter value com- bined with an M (M=2 for bT=OS, M=3 for bT=O.25) ADVANTAGES OF A BINARY AMPLITUDE, DISCRETE TIME APPROACH There are several problems which arise in the use of an analog gaussian premodulation filter. This type of filter causes the zero crossing locations of the output waveform to be a function of the binary input pattern. This type of filter causes the peak output obtained for certain binary inputs to not reach their theoretical maximum. Analog filters will exhibit a non uniform delay, and their perfor- mance will vary over time, temperature, and external component value. Several external resistors and capaci- tors are necessary to realize an analog fdter.