# US 2014/0192911 A1 · System, a device and a method for adjusting signal strength in a distributed amplifier system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192911 A1 - Document ID: US20140192911A1 - Status: Published application - Kind: A1 - Application number: 14/149,830 - Filed: 2014-01-08 - Published: 2014-07-10 - Earliest claimed: 2013-01-08 - Assignees: Zone Access Technologies, Inc. - Applicants: Zone Access Technologies, Inc. - Inventors: Scott Terry - Web page: https://patentgrep.com/patent/US20140192911A1 ## CPC - H04W 52/245: {taking into account received signal strength} - H03G 3/20: Automatic control ({H03G3/005 takes precedence;} combined with volume compression or expansion H03G7/00) - H04B 1/16: Circuits - H04B 17/318: Received signal strength - H04W 16/26: Cell enhancers {or enhancement}, e.g. for tunnels, building shadow - H04W 24/02: Arrangements for optimising operational condition - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 52/52: using AGC [Automatic Gain Control] circuits or amplifiers - H04W 88/085: {Access point devices with remote components} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H03G: CONTROL OF AMPLIFICATION - H04B: TRANSMISSION ## Abstract The invention discloses a system comprising a first device and a plurality of second device. The system comprises a first device and a plurality of second devices. The first device comprises a receiver, a spectrum analyzer, a controller and a transmitter. The receiver receives, from at least one antenna, a plurality of signals with different signal strengths from different sources. The spectrum analyzer is communicatively coupled to the receiver and obtains strengths of the plurality of received signals. The controller is communicatively coupled to the spectrum analyzer and adjusts a radiation feature of one of at least one antenna to minimize a difference of the strengths between a plurality of received signals after adjustment. The transmitter transmits the received signals after adjustment to a plurality of second devices distributed within a site. The plurality of second devices transmit the plurality of received signals after adjustment within the site. ## Claims ### Claim 1 A system comprising: a first device comprising a receiver configured to receive, from at least one antenna, a plurality of signals with different signal strengths from different sources; a spectrum analyzer communicatively coupled to the receiver and configured to obtain strengths of the plurality of received signals; a controller communicatively coupled to the spectrum analyzer and configured to adjust a radiation feature of one of at least one antenna to minimize a difference of the strengths between a plurality of received signals after adjustment; and a transmitter configured to transmit the received signals after adjustment to a plurality of second devices distributed within a site; and the plurality of second devices configured to transmit the plurality of received signals after adjustment within the site. ### Claim 2 A device comprising: a receiver configured to receive, from at least one antenna, a plurality of signals with different signal strengths from different sources; a spectrum analyzer communicatively coupled to the first receiver and configured to determine whether the strengths of the plurality of received signals are within a predetermined range; and a controller communicatively coupled to the first spectrum analyzer and configured to adjust a radiation feature of some or all of at least one antenna such that the strengths of the plurality of received signals are within the predetermined range. ### Claim 3 (depends on 2) The device of claim 2 further comprising: a transmitter configured to transmit the received signals after adjustment to a plurality of second devices distributed within a site. ### Claim 4 (depends on 2) The device of claim 2, wherein the controller is also configured to adjust the radiation feature of one of the antenna such that the difference of strengths of the plurality of received signals after adjustment are within a predetermined scope. ### Claim 5 (depends on 2) The device of claim 2, wherein the plurality of signals are across a plurality of frequency bands, and the spectrum analyzer is also configured to obtain both a maximum strength and a minimum strength of each frequency band; and the controller is also configured to adjust the radiation feature of some or all of the at least one antenna such that the strengths of the plurality of received signals after adjustment in each of the plurality of frequency bands are within the predetermined range. ### Claim 6 (depends on 2) The device of claim 2 further comprising: an alarm unit communicatively coupled to the spectrum analyzer and configured to generate an alarm signal if the spectrum analyzer detects that a change of the strengths of the plurality of received signals exceed a predetermined threshold. ### Claim 7 (depends on 2) The device of claim 2, wherein the radiation feature of at least one antenna comprises directions of at least one antenna. ### Claim 8 (depends on 2) The device of claim 2, wherein the radiation feature of at least one antenna comprises locations of at least one antenna. ### Claim 9 (depends on 2) The device of claim 2, further comprising a filter configured to adjust gain of at least one of the strengths of the plurality of received signals such that the strengths of the plurality of received signals after adjustment are within the predetermined range. ### Claim 10 (depends on 2) The device of claim 2, wherein the controller remotely adjusts a radiation feature of some or all of at least one antenna such that the strengths of a plurality of received signals after adjustment are within the predetermined range. ### Claim 11 (depends on 2) The device of claim 2, wherein the plurality of signals are from different network operators. ### Claim 12 A device comprising: a receiver configured to receive, from at least one antenna communicatively coupled to the device, a plurality of signals with different signal strengths from different sources; a spectrum analyzer communicatively coupled to the receiver and configured to obtain strengths of the plurality of received signals are within a predetermined range; a controller communicatively coupled to the spectrum analyzer and configured to determine an adjustment indication according to the strength; wherein the device further comprises a filter configured to adjust some or all of the gain of at least one of the strengths of the plurality of received signals according the adjustment indication such that the strengths of the plurality of received signals after adjustment are within the predetermined range. ### Claim 13 (depends on 12) The device of claim 12 further comprising a transmitter configured to transmit the received signals after adjustment to a plurality of second devices distributed within a site. ### Claim 14 (depends on 12) A device of claim 12, wherein the filter includes a radio frequency (RF) filter configured to adjust gain of some or all of at least one of the strengths of the plurality of received signals. ### Claim 15 (depends on 12) A device of claim 12, wherein the filter includes a synthesizer configured to select a part of the plurality of received signals within a predetermined frequency range. ### Claim 16 (depends on 12) A device of claim 12, wherein the filter further comprises a digital signal processing (DSP) unit configured to filter the plurality of signals. ### Claim 17 (depends on 12) The device of claim 12 further comprising: an alarm unit configured to generate an alarm signal if the spectrum analyzer detects that a change of the strengths of the plurality of received signals exceed a predetermined threshold. ### Claim 18 (depends on 12) The device of claim 12, wherein the radiation feature of at least one antenna comprises directions of at least one antenna. ### Claim 19 (depends on 12) The device of claim 12, wherein the radiation feature of at least one antenna comprises locations of at least one antenna. ### Claim 20 A method comprising: receiving, from at least one antenna, a plurality of signals with different signal strengths from different sources; determining whether the strengths of the plurality of received signals are within a predetermined range; and adjusting gain of some or all of at least one of the strengths of the plurality of received signals such that the strengths of the plurality of received signals after adjustment are within the predetermined range. ### Claim 21 (depends on 20) The method of claim 20, wherein adjusting the gain of at least one of the strengths of the plurality of received signals includes selecting a part of the plurality of received signals within a predetermined frequency range.