# US 10,484,026 B2 · Circuit arrangement and method for attenuation compensation in an antenna signal link > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,484,026 B2 - Document ID: US10484026B2 - Status: Granted - Kind: B2 - Application number: 16/015,635 - Filed: 2018-06-22 - Published: 2018-10-18 - Granted: 2019-11-19 - Earliest claimed: 2016-05-03 - Assignees: Bury Sp.z.o.o. - Applicants: Bury Sp.z.o.o. - Inventors: Bülent Solan - Web page: https://patentgrep.com/patent/US10484026B2 ## CPC - H04B 1/0475: {with means for limiting noise, interference or distortion (H04B1/0483 takes precedence)} - H03G 3/3036: {in high-frequency amplifiers or in frequency-changers (H03G3/3052, H03G3/32, H03G3/34 take precedence)} - H04B 1/3877: Arrangements for enabling portable transceivers to be used in a fixed position, e.g. cradles or boosters - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04W 52/52: using AGC [Automatic Gain Control] circuits or amplifiers - H03G 2201/106: being attenuating element - H04B 1/0458: {Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages (matching circuits in general H03H)} - H04B 1/163: {Special arrangements for the reduction of the damping of resonant circuits of receivers (amplifiers H03F; negative impedance networks for line transmission systems H04B3/16)} - H04B 1/18: Input circuits, e.g. for coupling to an antenna or a transmission line (coupling networks between antennas or lines and receivers independent of the nature of the receiver H03H) - H04B 1/3822: specially adapted for use in vehicles (H04B1/3827 takes precedence) - H04B 2001/0416: {having gain or transmission power control} - H04W 52/08: Closed loop power control - H04B: TRANSMISSION - H03G: CONTROL OF AMPLIFICATION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A circuit arrangement for compensating for an attenuation occurring in an antenna signal link between a mobile radio terminal and an antenna has at least one antenna signal amplifier in the antenna signal link and a control unit for adjusting a gain factor. The antenna signal conducted through an associated antenna signal amplifier is amplified or attenuated. The circuit arrangement has a detection unit for detecting an antenna signal power (PM, PA) of the antenna signal in the signal path of the antenna signal link. The control unit is configured for changing the gain factor, detecting a change, changing the transmit power (PM) of the mobile radio terminal, and adapting the gain factor to the coupling attenuation of the antenna signal link in dependence on a detected response of the mobile radio terminal. ## Claims ### Claim 1 A circuit arrangement for compensating for an attenuation occurring in an antenna signal link between a mobile radio terminal and an antenna, comprising: at least one antenna signal amplifier in the antenna signal link for amplifying or attenuating an antenna signal; a control unit associated with said at least one antenna amplifier for adjusting a gain factor by which the antenna signal conducted through the at least one signal amplifier is amplified or attenuated; and at least one detection unit for detecting an antenna signal power of the antenna signal in a signal path of the antenna signal link, wherein the control unit is configured for changing the gain factor incrementally in predetermined variables of the gain factor by way of a test to provide a corresponding pattern, for detecting a change, following as response to the test-wise change of the gain factor, of antenna signal power caused by a change of transmit power of a mobile radio terminal, and for adapting the gain factor to a coupling attenuation of the antenna signal link in dependence on the corresponding pattern of a detected response of the mobile radio terminal. ### Claim 2 (depends on 1) The circuit arrangement according to claim 1, wherein the control unit is configured for a further increase in the gain factor if, by detecting the antenna signal power, no change of the transmit signal power of the mobile radio terminal as response to a test-wise increase in the gain factor is detected. ### Claim 3 (depends on 1) The circuit arrangement according to claim 1, wherein the control unit is configured for adjusting a predetermined minimum gain factor if the detected antenna signal power is less than a predetermined threshold value. ### Claim 4 (depends on 1) The circuit arrangement according to claim 1, wherein the control unit is configured for adjusting a predetermined minimum gain factor when a change in the detected signal power is detected. ### Claim 5 (depends on 1) The circuit arrangement according to claim 1, wherein the control unit is configured for adjusting a predetermined minimum gain factor when the detected antenna signal power is less than a predetermined second threshold value after the first determination of an optimal gain factor. ### Claim 6 (depends on 1) The circuit arrangement according to claim 1, wherein the control unit is configured for evaluating the form of the antenna signal power detected with the at least one detection unit in response to a sequence of test-wise changes of the gain factor. ### Claim 7 (depends on 1) The circuit arrangement according to claim 1, wherein the control unit is configured for changing the gain factor in a phase in which the detected transmit signal power of the mobile radio terminal is constant, to a gain factor suitable for compensating for a difference of the antenna signal power detected during a process of the antenna signal amplifier and the transmit signal power of the mobile radio terminal. ### Claim 8 (depends on 1) The circuit arrangement according to claim 1, wherein the control unit is configured for the detection of antenna signal power received via an antenna from the control unit or radiated via the antenna for an incremental change of the gain factor in a phase in which the detected antenna signal power is constant, and the control unit is configured for determining the coupling attenuation in dependence on the detected antenna signal power when the incremental change of the gain factor does not lead to a change of the detected antenna signal power. ### Claim 9 (depends on 1) The circuit arrangement according to claim 1, wherein the circuit arrangement includes a data memory for storing an adapted gain factor and a predetermined minimal gain factor. ### Claim 10 (depends on 1) The circuit arrangement according to claim 1, wherein the control unit is configured for adjusting the antenna signal amplifier with an adapted gain factor for as long until a maximum transmit signal power of a mobile radio terminal is detected, and on detection of an operation at maximum transmit signal power of the mobile radio terminal a new adaptation of the gain factor takes place. ### Claim 11 A method for compensating for an attenuation occurring in an antenna signal link between a mobile radio terminal and an antenna with the aid of at least one signal amplifier in the antenna signal link comprising the steps: detecting an antenna signal power of the antenna signal in the signal path of the antenna signal link, changing a gain factor incrementally in predetermined variables of the gain factor by way of a test to provide a corresponding pattern, detecting if the antenna signal power changes in response to the test-wise change of the gain factor due to a power control of the mobile radio terminal, and adapting the gain factor to the coupling attenuation of the antenna signal link in dependence on the corresponding pattern of a detected change in the antenna signal power as a response of the power control of the mobile radio terminal. ### Claim 12 (depends on 11) The method according to claim 11, further comprising a further increase or further decrease of the gain factor when, due to detection of the antenna signal power, no change of the transmit signal power of the mobile radio terminal as a response to a test-wise increase in the gain factor is detected. ### Claim 13 (depends on 11) The method according to claim 11, further comprising the step of adjusting a predetermined minimum gain factor when the detected antenna signal power is less than a predetermined threshold value or when a change of the received transmit power is detected. ### Claim 14 (depends on 11) The method according to claim 11, further comprising evaluating a form of the antenna signal power which is obtained as a response to a sequence of test-wise changes of the gain factor. ### Claim 15 (depends on 11) The method according to claim 11, further comprising the step of incrementally changing the gain factor and retaining of the gain factor over a time interval which is greater than the control time of a power control of the mobile radio terminal through control signals of a base station. ### Claim 16 (depends on 11) The method according to claim 11, further comprising changing the gain factor in a phase in which the detected transmit signal power of the mobile radio terminal is constant to a gain factor suitable for compensating for the difference of antenna signal power detected during a process of the antenna signal amplifier and the transmit power of the mobile radio terminal. ### Claim 17 (depends on 11) The method according to claim 11, further comprising the steps of: detecting the antenna signal power received via the antenna or radiated via the antenna, incrementally changing of the gain factor in a phase in which the detected antenna signal power is constant, and determining a coupling attenuation in dependence on the detected antenna signal power when the incremental change of the gain factor does not lead to a change in the detected antenna signal power. ### Claim 18 A circuit arrangement for compensating for an attenuation occurring in an antenna signal link between a mobile radio terminal and an antenna, comprising: at least one antenna signal amplifier in the antenna signal link for amplifying or attenuating an antenna signal; a control unit associated with said at least one antenna amplifier for adjusting a gain factor by which the antenna signal conducted through the at least one signal amplifier is amplified or attenuated; and at least one detection unit for detecting an antenna signal power of the antenna signal in a signal path of the antenna signal link, wherein the control unit is configured for changing the gain factor by way of a test, for detecting a change, following as response to the test-wise change of the gain factor, of antenna signal power caused by a change of transmit power of a mobile radio terminal, for resetting the gain factor after the test-wise change of the gain factor to the value of the gain factor being adjusted just before performing the change of the gain factor by way of a test, and for adapting the gain factor to a coupling attenuation of the antenna signal link in dependence on a detected response of the mobile radio terminal. ### Claim 19 A method for compensating for an attenuation occurring in an antenna signal link between a mobile radio terminal and an antenna with the aid of at least one signal amplifier in the antenna signal link comprising the steps: detecting an antenna signal power of the antenna signal in the signal path of the antenna signal link, changing a gain factor by way of a test, detecting if the antenna signal power changes in response to the test-wise change of the gain factor due to a power control of the mobile radio terminal, resetting the gain factor after the test-wise change of the gain factor to the value of the gain factor being adjusted just before performing the change of the gain factor by way of a test, and adapting the gain factor to the coupling attenuation of the antenna signal link in dependence on a detected change in the antenna signal power as a response of the power control of the mobile radio terminal. ### Claim 20 A circuit arrangement for compensating for an attenuation occurring in an antenna signal link between a mobile radio terminal and an antenna, comprising: at least one antenna signal amplifier in the antenna signal link for amplifying or attenuating an antenna signal; a control unit associated with said at least one antenna amplifier for adjusting a gain factor by which the antenna signal conducted through the at least one signal amplifier is amplified or attenuated; and at least one detection unit for detecting an antenna signal power of the antenna signal in a signal path of the antenna signal link, wherein the control unit is configured for changing the gain factor by way of a test, for detecting a change, following as response to the test-wise change of the gain factor, of antenna signal power caused by a change of transmit power of a mobile radio terminal, and for adapting the gain factor to a coupling attenuation of the antenna signal link in dependence on a detected response of the mobile radio terminal, wherein the control unit is configured to decide by means of the resultant response to the test-wise changing of the gain factor either due to a starting power control of the mobile radio terminal or by absence of the power control of the mobile radio terminal whether and to what extent the gain factor is adapted. ### Claim 21 A method for compensating for an attenuation occurring in an antenna signal link between a mobile radio terminal and an antenna with the aid of at least one signal amplifier in the antenna signal link comprising the steps: detecting an antenna signal power of the antenna signal in the signal path of the antenna signal link, changing a gain factor by way of a test, detecting if the antenna signal power changes in response to the test-wise change of the gain factor due to a power control of the mobile radio terminal, deciding by means of the resultant response to the test-wise changing of the gain factor either due to a starting power control of the mobile radio terminal or by absence of the power control of the mobile radio terminal whether and to what extent the gain factor is adapted, and adapting the gain factor to the coupling attenuation of the antenna signal link in dependence on a detected change in the antenna signal power as a response of the power control of the mobile radio terminal.