System and method for reducing cumulative noise in a distributed

Details System and method for reducing cumulative noise in a distributed System and method for reducing cumulative noise in a distributed

1996-07-18

2000-10-03

Rao, Andy

Telecommunications

Carrier wave repeater or relay system

Two separate way transmission

455422, 455 14, H04N 7155

Patent

active

06128470&

ABSTRACT:
A communications system and method are provided for reducing noise in a distributed antenna network. The system includes a plurality of remote antenna units with each remote antenna unit including a receiver for receiving input signals, a signal strength processor for determining whether a valid signal is present at its respective remote antenna unit and an output controller for switching off the network connection when no valid signal is present. As a result, the cumulative noise generated by uplink stages connected to the remote antenna units is reduced by switching off the network connection of remote antennas that are do not have to be connected. The communications system and method may further include an output controller for controlling the output for its respective remote antenna unit based on the comparison by the signal strength processor. The output controller may control the network connection of the remote antennas by switching off their connection to the network when the signal strength processor determines that the signal strength level is below a noise threshold level. The output controller may control the output of the remote antenna units by switching off their connection to the network when the signal strength processor determines that the signal strength level is below a noise threshold level and by switching on the connection to the network when the input signal strength level is greater than or equal to the noise threshold level.

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