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Non-Coherent Collision Detection

IP.com Disclosure Number: IPCOM000059616D
Original Publication Date: 1986-Jan-01
Included in the Prior Art Database: 2005-Mar-08

Publishing Venue

IBM

Related People

Authors:
Fallwell, BN Kaltenbach, MA Ott, WB [+details]

Abstract

This article describes a circuit arrangement for non-coherent frequency shift keying (FSK) collision detection. The use of coherent and non-coherent detection of radio frequency (RF) signals is well known in the industry. There are a number of advantages to coherent detection that limits the use of non-coherent detection today. One of those advantages is its tolerance to noise. Just as lightning has little effect on a frequency modulated (FM) radio, noise has little effect on coherently detected RF signals. Once a receiver has locked onto the carrier, noise (or a distant transmitter) has very little effect. This is known as the capture effect and is beneficial in recovering data from a network.