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Jitter Smoothing Algorithm

IP.com Disclosure Number: IPCOM000058230D
Original Publication Date: 1988-Sep-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Chang, LL Ku, EH Ott, WB [+details]

Abstract

This article describes a technique for use in a data communication network environment to smooth out jitter so that a receiving circuit can decode the incoming data correctly. In a data communication network environment, such as local area network (LAN) or wide area network, data usually is transmitted through modem and cable to reach the receiving end. Data reaching the receiving end has jitter. The jitter is the shifting of the edge of a signal from the nominal position due to the characteristics of the modem and the transmission over a length of cable. Various factors like temperature, signal strength, intersymbol interference, noise, etc., contribute to the jitter. In some personal computer (PC) network LAN systems +-150 ns of jitter for 2 MHz data rate is experienced.