COMPATIBILITY ISSUES BETWEEN BLUETOOTH AND HIGH POWER SYSTEMS IN THE ISM BANDS

摘要

Much discussion has taken place over the last several years about the tremendous growth potential for low power microwave chip devices for low power, unlicensed communications within the 2450 MHz band. Techniques for wireless communication consist of frequency hopping spread spectrum (FHSS) and direct sequence spread spectrum (DSSS). The generic name Bluetooth has recently been utilized to encompass all these types of devices even though it strictly applies only to FHSS. While the economic potential for such technology is undisputed, there is reason to believe that the wireless industry is not aware of the problems that are looming on the horizon in the form of interference from consumer and commercial microwave ovens and industrial microwave equipment installations. These types of non-communications equipment are operating legally in the industrial, scientific, and medical (ISM) bands and present spectra that are quite variable, and in many cases have quite high amplitudes. This article outlines the background and problems that exist and enjoins the two industries to work together to resolve the compatibility issues.