Patent ID: 6128470
Filing Date: 2000-10-03
Classification: H01Q,H04B

Abstract:
A communication system for reducing noise in a distributed antenna network, comprising:a plurality of remote antenna units, each of said remote antenna units including,a receiver for receiving input signals,a signal strength processor for detecting levels of said input signals for said remote antenna unit and comparing the levels of said input signals with first and second noise threshold levels, andan output controller for switching off a network connection for said remote antenna unit when said signal strength processor determines that the levels of said input signals are less than the first noise threshold level and switching on the network connection for said remote antenna unit when said signal strength processor determines that the levels of said input signals are greater than or equal to the second noise threshold level, wherein the second noise threshold level is greater than the first noise threshold level, and wherein a) when the levels of the input signals are between the first and second noise threshold levels and the network connection for the remote antenna unit is off, and then the levels of the input signals meet the second noise threshold level, the output controller switches on the network connection for the remote antenna unit; and b) when the levels of the input signals are between the first and second noise threshold levels and the network connection for the remote antenna unit is on, and then the levels of the input signals cross the first noise threshold level, the output controller switches off the network connection for the remote antenna unit; anda central unit for remotely adjusting the first and second noise threshold levels for each remote antenna unit.