SYSTEM, A DEVICE AND A METHOD FOR ADJUSTING OUTPUT POWER IN A DISTRIBUTED AMPLIFIER SYSTEM
A system comprises a first device and a second device. The first device comprises a receiver, a spectrum analyzer, a controller, an amplifier, a filter and a transmitter. The first device receives from at least one antenna a plurality of signals from different sources. The spectrum analyzer is coupled to the receiver and determines whether a downlink signal power from each of the sources to the system exceeds a predetermined threshold. The controller is coupled to the spectrum analyzer and generates a first indication indicating lowering gains of an amplifier on signals from at least one source with downlink signal power larger than the predetermined threshold. The amplifier is coupled to the controller and lowers gains of the amplifier according to the indication from the controller. The transmitter transmits the plurality of signals after adjustment to at least one second device distributed within a site.
1 . A system comprising:
a first device comprising
a receiver configured to receive, from at least one antenna, a plurality of signals from different sources;
a spectrum analyzer communicatively coupled to the receiver and configured to determine whether a downlink signal power from each of the sources to the system exceeds a predetermined threshold;
a controller communicatively coupled to the spectrum analyzer and configured to generate a first indication indicating lowering gains of an amplifier on signals from at least one source with downlink signal power larger than the predetermined threshold;
the amplifier communicatively coupled to the controller and configured to lower gains of the amplifier according to the indication from the controller;
a transmitter configured to transmit the plurality of signals after adjustment to at least one of the second device distributed within a site; and
the at least one second devices configured to transmit the plurality of received signals after adjustment within the site.
2 . The system of claim 1 ,
wherein the controller is also configured generate a second indication indicating increasing gains on signals from at least one source with downlink signal power smaller than or equal to the predetermined threshold.
3 . The system of claim 1 ,
wherein the first indication further comprises lowering output power of the signals from at least one source with downlink signal power larger than the predetermined threshold such that noises of the plurality of signals after adjustment are below a predetermined noise floor.
4 . The system of claim 1 , further comprising a filter communicatively coupled to the controller, wherein the filter includes a radio frequency (RF) filter configured to lower output power of the signals from the at least one source with downlink signal power larger than the predetermined threshold.
5 . A system of claim 1 , further comprising a filter communicatively coupled to the controller, wherein the filter includes a synthesizer configured to lower output power of the signals from the at least one source with downlink signal power larger than the predetermined threshold.
6 . A system of claim 1 , further comprising a filter communicatively coupled to the controller, wherein the filter further comprises a digital signal processing (DSP) unit configured to lower output power of the signals from the at least one source with downlink signal power larger than the predetermined threshold.
7 . The system of claim 1 ,
wherein the first device comprises a head end, and the second device comprises a coverage node.
8 . A first device comprising
a receiver configured to receive, from at least one antenna, a plurality of signals from different sources;
a spectrum analyzer communicatively coupled to the receiver and configured to determine whether a downlink signal power from each of the sources to the system exceeds a predetermined threshold;
a controller communicatively coupled to the spectrum analyzer and configured to generate an indication indicating lowering gains on signals from at least one source with a downlink signal power larger than a predetermined threshold;
an amplifier communicatively coupled to the controller and configured to lower gains of the amplifier according to the indication from the controller; and
a transmitter configured to transmit the plurality of signals after adjustment to at least one second device distributed within a site.
9 . A method comprising:
receiving, from at least one antenna, a plurality of signals from different sources;
determining whether a downlink signal power from each of the sources to the system exceeds a predetermined threshold;
lowering gains on signals from at least one source with a downlink signal power larger than the predetermined threshold;
transmitting the plurality of signals after adjustment to a plurality of second devices distributed within a site.
10 . A system comprising:
A plurality of first devices distributed in a site each comprising
a first transmitter configured to transmit at least one signal to a second device; and
the second device comprising
a receiver configured to receive a plurality of signals from the plurality of first devices;
a spectrum analyzer configured to determine whether a downlink signal power from a source to the system exceeds a predetermined threshold; and
a controller communicatively coupled to the spectrum analyzer and configured to generate an indication indicating lowering gains on signals from the first device to the second device when a downlink signal power from the source to the system exceeds a predetermined threshold;
an amplifier communicatively coupled to the controller and configured to lower gains of the amplifier according to the indication from the controller;
a transmitter configured to transmit the plurality of signals after adjustment to the source.
11 . The system of claim 10 ,
wherein the controller is also configured to increase gains on signals when a downlink signal power from the destination to the system is smaller or equal to a predetermined threshold.
12 . The system of claim 10 ,
wherein the first device comprises a head end, the second device comprises coverage nodes, and the source comprises a telecommunication tower or access point.