CN108288992B - Method and device for automatically controlling gain of micro repeater and baseband chip - Google Patents
Method and device for automatically controlling gain of micro repeater and baseband chip Download PDFInfo
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- CN108288992B CN108288992B CN201710013155.2A CN201710013155A CN108288992B CN 108288992 B CN108288992 B CN 108288992B CN 201710013155 A CN201710013155 A CN 201710013155A CN 108288992 B CN108288992 B CN 108288992B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
- H04B7/15535—Control of relay amplifier gain
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
Abstract
The invention provides a method, a device and a baseband chip for automatically controlling gain of a micro repeater, which are used for calculating initial gain G0_ D of a downlink and initial gain G0_ U of an uplink; calculating a received signal strength indication RSSI0_ D in the downlink ideal state and a received signal strength indication RSSI0_ U in the uplink ideal state; calculating a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the received signal strength indication RSSI0_ D in the downlink ideal state, and calculating an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the received signal strength indication RSSI0_ U in the uplink ideal state. The real-time detection of the uplink input power and the downlink input power is realized by utilizing the baseband chip, the gain required by the link is calculated before the amplification link is opened, the gain stability of the whole link is ensured, and the gain can be adjusted in real time.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a method and a device for automatically controlling gain of a miniature repeater and a baseband chip.
Background
Due to the complexity of the building structure and the loss of the signal by the wall, the outdoor macro station can penetrate the wall, but the deep coverage performance of the indoor is difficult to guarantee. The micro repeater has the advantages of simple structure, low cost, easy installation and the like, and is widely applied to blind areas and weak fields which are difficult to cover. In practical use, on one hand, the amplification gain of the micro repeater to the signal meets the requirement of a coverage distance during network planning, and on the other hand, the output power is controlled to ensure that a power amplifier device is not in an over-power state and simultaneously an over-strong output signal which causes interference to an adjacent base station does not exist.
An amplification link of a traditional micro repeater is generally built by adopting separated analog components, and comprises a gate circuit and a direct current amplification device, output power is measured by a detector at an output end, and an adjustable attenuator is controlled by direct current slowly-varying voltage reflecting the amplitude variation trend of a signal, so that the aim of ALC (Automatic level control) is fulfilled.
In the process of implementing the invention, the inventor finds that at least the following technical problems exist in the prior art: at the beginning of the design of the amplification link, after the analog device is determined, the rated gain of the micro repeater is fixed, and the gain cannot be flexibly configured.
Disclosure of Invention
The method, the device and the baseband chip for automatically controlling the gain of the micro repeater realize the real-time detection of the uplink and downlink input power by utilizing the baseband chip, calculate the gain required by the link before the amplification link is opened, ensure the gain stability of the whole link and adjust the gain in real time.
In a first aspect, the present invention provides a method for automatically controlling gain of a micro repeater, including:
calculating a downlink initial gain G0_ D and an uplink initial gain G0_ U;
calculating a received signal strength indication RSSI0_ D in the downlink ideal state and a received signal strength indication RSSI0_ U in the uplink ideal state;
calculating a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the received signal strength indication RSSI0_ D in the downlink ideal state, and calculating an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the received signal strength indication RSSI0_ U in the uplink ideal state.
Optionally, the calculating the downlink initial gain G0_ D and the uplink initial gain G0_ U is performed by:
when RSRP _ D < PR _ D-GR _ D-10log (N)RB) G0_ D ═ GR _ D;
when RSRP _ D is more than or equal to PR _ D-GR _ D-10log (N)RB) When G0_ D is PR _ D-RSRP _ D-10log(NRB)；
Wherein RSRP _ D is the measured reference signal received power of the downlink, PR _ D is the rated transmission power of the downlink, NRBThe number of the sub-carriers is GR _ D, the rated gain of the downlink is GR _ D, and PA _ D is the actual transmitting power of the downlink;
G0_U＝min(GR_U，G0_D-offset)，
where GR _ U is a nominal gain of the uplink, and offset is a fixed offset between an initial gain of the uplink and an initial gain of the downlink.
Optionally, the calculating the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state is performed by:
RSSI0_D＝RSSIdefault_D+GAGC_D-Gdefault_D；
wherein the RSSIdefaultD is a default received signal strength indication, G, of the AGC in the downlinkAGCD is the actual gain of AGC in the downlink, GdefaultD is the default gain of AGC in downlink;
RSSI0_U＝RSSIdefault_U+GAGC_U-Gdefault_U；
wherein the RSSIdefaultU is the default received signal strength indication, G, of the AGC in the uplinkAGCU is the actual gain of AGC in the uplink, GdefaultU is the default gain of AGC in the uplink.
Optionally, before the calculating the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state, further comprising:
automatically adjusting an actual gain G of AGC in a downlink according to an actually measured received signal strength indication RSSI1_ D of the downlink and a received signal strength indication RSSI1_ U of an uplink respectivelyAGCD and actual gain G of AGC in the uplinkAGC_U。
Optionally, after the calculating the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state, before the calculating the downlink actual gain G1_ D according to the downlink initial gain G0_ D and the RSSI0_ D in the downlink ideal state, further comprises:
automatically adjusting the actual gain G of the APC in the downlink according to the actual transmit power PA _ D of the downlinkAPCD and actual gain G of power amplifier PA in downlinkPAThe sum of (a), (b) and (c) to ensure GAGC_D+GAPC_D+GPA_D＝G0_D；
Automatically adjusting the actual gain G of the APC in the uplink according to the actual transmit power PA _ U of the uplinkAPCU and actual gain G of power amplifier PA in uplinkPAThe sum of _Uto ensure GAGC_U+GAPC_U+GPA_U＝G0_U。
Optionally, the calculating a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the received signal strength indicator RSSI0_ D in the downlink ideal state, and the calculating an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the received signal strength indicator RSSI0_ U in the uplink ideal state comprises: when RSSI0_ D < PR _ D-G0_ D and RSSI0_ U < PR _ U-G0_ U, G1_ D-G0_ D and G1_ U-G0_ U;
when RSSI0_ D is greater than or equal to PR _ D-G0_ D and RSSI0_ U < PR _ U-G0_ U,
G1_D＝min(G0_D，PR_D-RSSI0_D)，G1_U＝G1_D-offset；
when RSSI0_ D < PR _ D-G0_ D, and RSSI0_ U ≧ PR _ U-G0_ U,
G1_D＝G0_D，G1_U＝min(G0_U，PR_U-RSSI0_U)；
when RSSI0_ D ≧ PR _ D-G0_ D, and RSSI0_ U ≧ PR _ U-G0_ U,
G1_D＝min(G0_D，PR_D-RSSI0_D)，G1_U＝min(G0_U，PR_U-RSSI0_U)。
in a second aspect, the present invention provides an apparatus for automatically controlling gain of a micro repeater, including:
a first calculation unit for calculating a downlink initial gain G0_ D and an uplink initial gain G0_ U;
a second calculation unit for calculating a received signal strength indication RSSI0_ D in the downlink ideal state and a received signal strength indication RSSI0_ U in the uplink ideal state;
a third calculating unit, configured to calculate a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the received signal strength indicator RSSI0_ D in the downlink ideal state, and calculate an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the received signal strength indicator RSSI0_ U in the uplink ideal state.
Alternatively, the first calculation unit calculates the downlink initial gain G0_ D and the uplink initial gain G0_ U by:
when RSRP _ D < PR _ D-GR _ D-10log (N)RB) G0_ D ═ GR _ D;
when RSRP _ D is more than or equal to PR _ D-GR _ D-10log (N)RB) G0_ D ═ PR _ D-RSRP _ D-10log (N)RB)；
Wherein RSRP _ D is the measured reference signal received power of the downlink, PR _ D is the rated transmission power of the downlink, NRBThe number of the sub-carriers is GR _ D, the rated gain of the downlink is GR _ D, and PA _ D is the actual transmitting power of the downlink;
G0_U＝min(GR_U，G0_D-offset)，
where GR _ U is a nominal gain of the uplink, and offset is a fixed offset between an initial gain of the uplink and an initial gain of the downlink.
Optionally, the second calculating unit calculates the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state by:
RSSI0_D＝RSSIdefault_D+GAGC_D-Gdefault_D；
wherein the RSSIdefaultD is an automatic increase in the downlinkControl of default received signal strength indication, G, of AGCAGCD is the actual gain of AGC in the downlink, GdefaultD is the default gain of AGC in downlink;
RSSI0_U＝RSSIdefault_U+GAGC_U-Gdefault_U；
wherein the RSSIdefaultU is the default received signal strength indication, G, of the AGC in the uplinkAGCU is the actual gain of AGC in the uplink, GdefaultU is the default gain of AGC in the uplink.
Optionally, before the second calculating unit calculates the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state, the method further includes:
automatically adjusting an actual gain G of AGC in a downlink according to an actually measured received signal strength indication RSSI1_ D of the downlink and a received signal strength indication RSSI1_ U of an uplink respectivelyAGCD and actual gain G of AGC in the uplinkAGC_U。
Optionally, after the second calculating unit calculates the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state, the third calculating unit further includes before calculating the downlink actual gain G1_ D according to the downlink initial gain G0_ D and the RSSI0_ D in the downlink ideal state:
automatically adjusting the actual gain G of the APC in the downlink according to the actual transmit power PA _ D of the downlinkAPCD and actual gain G of power amplifier PA in downlinkPAThe sum of (a), (b) and (c) to ensure GAGC_D+GAPC_D+GPA_D＝G0_D；
Automatically adjusting the actual gain G of the APC in the uplink according to the actual transmit power PA _ U of the uplinkAPCU and actual gain G of power amplifier PA in uplinkPAThe sum of _Uto ensure GAGC_U+GAPC_U+GPA_U＝G0_U。
Optionally, the third calculating unit calculates a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the received signal strength indicator RSSI0_ D in the downlink ideal state, and calculates an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the received signal strength indicator RSSI0_ U in the uplink ideal state includes: when RSSI0_ D < PR _ D-G0_ D and RSSI0_ U < PR _ U-G0_ U, G1_ D-G0_ D and G1_ U-G0_ U;
when RSSI0_ D is greater than or equal to PR _ D-G0_ D and RSSI0_ U < PR _ U-G0_ U,
G1_D＝min(G0_D，PR_D-RSSI0_D)，G1_U＝G1_D-offset；
when RSSI0_ D < PR _ D-G0_ D, and RSSI0_ U ≧ PR _ U-G0_ U,
G1_D＝G0_D，G1_U＝min(G0_U，PR_U-RSSI0_U)；
when RSSI0_ D ≧ PR _ D-G0_ D, and RSSI0_ U ≧ PR _ U-G0_ U,
G1_D＝min(G0_D，PR_D-RSSI0_D)，G1_U＝min(G0_U，PR_U-RSSI0_U)。
in a third aspect, the present invention provides a baseband chip, where the baseband chip includes the device for self-excitation detection and processing of the micro repeater.
The method, the device and the baseband chip for automatically controlling the gain of the micro repeater provided by the embodiment of the invention calculate the initial gain G0_ D of the downlink and the initial gain G0_ U of the uplink; calculating a received signal strength indication RSSI0_ D in the downlink ideal state and a received signal strength indication RSSI0_ U in the uplink ideal state; calculating a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the received signal strength indication RSSI0_ D in the downlink ideal state, and calculating an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the received signal strength indication RSSI0_ U in the uplink ideal state. The real-time detection of the uplink input power and the downlink input power is realized by utilizing the baseband chip, the gain required by the link is calculated before the amplification link is opened, the gain stability of the whole link is ensured, and the gain can be adjusted in real time.
Drawings
FIG. 1 is a schematic flow chart of a micro repeater according to the present invention;
FIG. 2 is a flow chart of a method for controlling gain automatically for a micro repeater according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an apparatus for automatically controlling gain of a micro repeater according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for automatically controlling gain of a micro repeater, which is characterized in that a schematic diagram of the micro repeater is shown in figure 1, a main channel of the micro repeater is formed by adopting a mode of cascading two radio frequency transceiver chips, each radio frequency transceiver chip is provided with two groups of loops consisting of a power amplifier and a low noise amplifier, and the micro repeater also comprises a baseband chip and a Power Management Unit (PMU). The up-link and down-link of the micro repeater are symmetrical.
As shown in FIG. 2, the method for automatically controlling gain of a micro repeater provided by the invention comprises the following steps:
s11, calculating a downlink initial gain G0_ D and an uplink initial gain G0_ U.
Optionally, the calculating the downlink initial gain G0_ D and the uplink initial gain G0_ U is performed by:
when RSRP _ D < PR _ D-GR _ D-10log (N)RB) G0_ D ═ GR _ D;
when RSRP _ D is more than or equal to PR _ D-GR _ D-10log (N)RB) G0_ D ═ PR _ D-RSRP _ D-10log (N)RB)；
Wherein RSRP _ D is the measured reference signal received power of the downlink, PR _ D is the rated transmission power of the downlink, NRBThe number of the sub-carriers is GR _ D, the rated gain of the downlink is GR _ D, and PA _ D is the actual transmitting power of the downlink;
G0_U＝min(GR_U，G0_D-offset)，
where GR _ U is a nominal gain of the uplink, and offset is a fixed offset between an initial gain of the uplink and an initial gain of the downlink.
S12, calculating the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state.
Optionally, the calculating the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state is performed by:
RSSI0_D＝RSSIdefault_D+GAGC_D-Gdefault_D；
wherein the RSSIdefaultD is a default received signal strength indication, G, of the AGC in the downlinkAGCD is the actual gain of AGC in the downlink, GdefaultD is the default gain of AGC in downlink;
RSSI0_U＝RSSIdefault_U+GAGC_U-Gdefault_U；
wherein the RSSIdefaultU is the default received signal strength indication, G, of the AGC in the uplinkAGCU is the actual gain of AGC in the uplink, GdefaultU is the default gain of AGC in the uplink.
Optionally, before the calculating the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state, further comprising:
automatically adjusting the downlink and uplink received signal strength indicators RSSI1_ D and RSSI1_ U according to actual measured received signal strength indicators RSSI1_ D and RSSI, respectivelyActual gain G of AGC in downlinkAGCD and actual gain G of AGC in the uplinkAGC_U。
S13, calculating a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the RSSI0_ D in the downlink ideal state, and calculating an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the RSSI0_ U in the uplink ideal state.
Optionally, after the calculating the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state, before the calculating the downlink actual gain G1_ D according to the downlink initial gain G0_ D and the RSSI0_ D in the downlink ideal state, further comprises:
automatically adjusting the actual gain G of the APC in the downlink according to the actual transmit power PA _ D of the downlinkAPCD and actual gain G of power amplifier PA in downlinkPAThe sum of (a), (b) and (c) to ensure GAGC_D+GAPC_D+GPA_D＝G0_D；
Automatically adjusting the actual gain G of the APC in the uplink according to the actual transmit power PA _ U of the uplinkAPCU and actual gain G of power amplifier PA in uplinkPAThe sum of _Uto ensure GAGC_U+GAPC_U+GPA_U＝G0_U。
Optionally, the calculating a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the received signal strength indicator RSSI0_ D in the downlink ideal state, and the calculating an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the received signal strength indicator RSSI0_ U in the uplink ideal state comprises: when RSSI0_ D < PR _ D-G0_ D and RSSI0_ U < PR _ U-G0_ U, G1_ D-G0_ D and G1_ U-G0_ U;
when RSSI0_ D is greater than or equal to PR _ D-G0_ D and RSSI0_ U < PR _ U-G0_ U,
G1_D＝min(G0_D，PR_D-RSSI0_D)，G1_U＝G1_D-offset；
when RSSI0_ D < PR _ D-G0_ D, and RSSI0_ U ≧ PR _ U-G0_ U,
G1_D＝G0_D，G1_U＝min(G0_U，PR_U-RSSI0_U)；
when RSSI0_ D ≧ PR _ D-G0_ D, and RSSI0_ U ≧ PR _ U-G0_ U,
G1_D＝min(G0_D，PR_D-RSSI0_D)，G1_U＝min(G0_U，PR_U-RSSI0_U)。
the method for automatically controlling the gain of the miniature repeater, provided by the embodiment of the invention, comprises the steps of calculating a downlink initial gain G0_ D and an uplink initial gain G0_ U; calculating a received signal strength indication RSSI0_ D in the downlink ideal state and a received signal strength indication RSSI0_ U in the uplink ideal state; calculating a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the received signal strength indication RSSI0_ D in the downlink ideal state, and calculating an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the received signal strength indication RSSI0_ U in the uplink ideal state. The real-time detection of the uplink input power and the downlink input power is realized by utilizing the baseband chip, the gain required by the link is calculated before the amplification link is opened, the gain stability of the whole link is ensured, and the gain can be adjusted in real time.
The embodiment of the present invention further provides a device for automatically controlling gain of a micro repeater, as shown in fig. 3, the device includes:
a first calculating unit 101, configured to calculate a downlink initial gain G0_ D and an uplink initial gain G0_ U.
Alternatively, the first calculation unit calculates the downlink initial gain G0_ D and the uplink initial gain G0_ U by:
when RSRP _ D < PR _ D-GR _ D-10log (N)RB) G0_ D ═ GR _ D;
when RSRP _ D is more than or equal to PR _ D-GR _ D-10log (N)RB) G0_ D ═ PR _ D-RSRP _ D-10log (N)RB)；
Wherein RSRP _ D is the measured reference signal received power of the downlink, PR _ D is the rated transmission power of the downlink, NRBIs the number of sub-carriers,GR _ D is the rated gain of the downlink, and PA _ D is the actual transmission power of the downlink;
G0_U＝min(GR_U，G0_D-offset)，
where GR _ U is a nominal gain of the uplink, and offset is a fixed offset between an initial gain of the uplink and an initial gain of the downlink.
A second calculating unit 102, configured to calculate a received signal strength indicator RSSI0_ D in the downlink ideal state and a received signal strength indicator RSSI0_ U in the uplink ideal state.
Optionally, the second calculating unit calculates the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state by:
RSSI0_D＝RSSIdefault_D+GAGC_D-Gdefault_D；
wherein the RSSIdefaultD is a default received signal strength indication, G, of the AGC in the downlinkAGCD is the actual gain of AGC in the downlink, GdefaultD is the default gain of AGC in downlink;
RSSI0_U＝RSSIdefault_U+GAGC_U-Gdefault_U；
wherein the RSSIdefaultU is the default received signal strength indication, G, of the AGC in the uplinkAGCU is the actual gain of AGC in the uplink, GdefaultU is the default gain of AGC in the uplink.
Optionally, before the second calculating unit calculates the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state, the method further includes:
automatically adjusting an actual gain G of AGC in a downlink according to an actually measured received signal strength indication RSSI1_ D of the downlink and a received signal strength indication RSSI1_ U of an uplink respectivelyAGCD and actual gain G of AGC in the uplinkAGC_U。
A third calculating unit 103, configured to calculate a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the received signal strength indicator RSSI0_ D in the downlink ideal state, and calculate an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the received signal strength indicator RSSI0_ U in the uplink ideal state.
Optionally, after the second calculating unit 102 calculates the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state, before the third calculating unit 103 calculates the downlink actual gain G1_ D according to the downlink initial gain G0_ D and the RSSI0_ D in the downlink ideal state, the method further comprises:
automatically adjusting the actual gain G of the APC in the downlink according to the actual transmit power PA _ D of the downlinkAPCD and actual gain G of power amplifier PA in downlinkPAThe sum of (a), (b) and (c) to ensure GAGC_D+GAPC_D+GPA_D＝G0_D；
Automatically adjusting the actual gain G of the APC in the uplink according to the actual transmit power PA _ U of the uplinkAPCU and actual gain G of power amplifier PA in uplinkPAThe sum of _Uto ensure GAGC_U+GAPC_U+GPA_U＝G0_U。
Optionally, the third calculating unit 103 calculates a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the received signal strength indicator RSSI0_ D in the downlink ideal state, and calculates an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the received signal strength indicator RSSI0_ U in the uplink ideal state includes: when RSSI0_ D < PR _ D-G0_ D and RSSI0_ U < PR _ U-G0_ U, G1_ D-G0_ D and G1_ U-G0_ U;
when RSSI0_ D is greater than or equal to PR _ D-G0_ D and RSSI0_ U < PR _ U-G0_ U,
G1_D＝min(G0_D，PR_D-RSSI0_D)，G1_U＝G1_D-offset；
when RSSI0_ D < PR _ D-G0_ D, and RSSI0_ U ≧ PR _ U-G0_ U,
G1_D＝G0_D，G1_U＝min(G0_U，PR_U-RSSI0_U)；
when RSSI0_ D ≧ PR _ D-G0_ D, and RSSI0_ U ≧ PR _ U-G0_ U,
G1_D＝min(G0_D，PR_D-RSSI0_D)，G1_U＝min(G0_U，PR_U-RSSI0_U)。
the device for automatically controlling the gain of the micro repeater provided by the embodiment of the invention calculates the initial gain G0_ D of the downlink and the initial gain G0_ U of the uplink; calculating a received signal strength indication RSSI0_ D in the downlink ideal state and a received signal strength indication RSSI0_ U in the uplink ideal state; calculating a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the received signal strength indication RSSI0_ D in the downlink ideal state, and calculating an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the received signal strength indication RSSI0_ U in the uplink ideal state. The real-time detection of the uplink input power and the downlink input power is realized by utilizing the baseband chip, the gain required by the link is calculated before the amplification link is opened, the gain stability of the whole link is ensured, and the gain can be adjusted in real time.
The embodiment of the invention also provides a baseband chip which comprises the device for automatically controlling the gain of the miniature repeater.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. A method for automatically controlling gain of a micro repeater is characterized by comprising the following steps:
calculating a downlink initial gain G0_ D and an uplink initial gain G0_ U;
calculating a received signal strength indication RSSI0_ D in the downlink ideal state and a received signal strength indication RSSI0_ U in the uplink ideal state;
calculating a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the RSSI0_ D in the downlink ideal state, and calculating an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the RSSI0_ U in the uplink ideal state, so as to adjust the gain of the link according to the downlink actual gain G1_ D and the uplink actual gain G1_ U, comprising: when RSSI0_ D < PR _ D-G0_ D and RSSI0_ U < PR _ U-G0_ U, G1_ D-G0_ D and G1_ U-G0_ U;
when RSSI0_ D is greater than or equal to PR _ D-G0_ D and RSSI0_ U < PR _ U-G0_ U,
G1_D＝min(G0_D，PR_D-RSSI0_D)，G1_U＝G1_D-offset；
when RSSI0_ D < PR _ D-G0_ D, and RSSI0_ U ≧ PR _ U-G0_ U,
G1_D＝G0_D，G1_U＝min(G0_U，PR_U-RSSI0_U)；
when RSSI0_ D ≧ PR _ D-G0_ D, and RSSI0_ U ≧ PR _ U-G0_ U,
g1_ D-min (G0_ D, PR _ D-RSSI0_ D), G1_ U-min (G0_ U, PR _ U-RSSI0_ U), where PR _ D is the nominal transmit power of the downlink, offset is the fixed offset between the initial gain of the uplink and the initial gain of the downlink, PR _ U is the nominal transmit power of the uplink, and G0_ U is the initial gain of the uplink.
2. The method according to claim 1, wherein the calculating of the downlink initial gain G0_ D and the uplink initial gain G0_ U is performed by:
when RSRP _ D < PR _ D-GR _ D-10log (N)RB) G0_ D ═ GR _ D;
when RSRP _ D is more than or equal to PR _ D-GR _ D-10log (N)RB) G0_ D ═ PR _ D-RSRP _ D-10log (N)RB)；
Wherein RSRP _ D is the measured reference signal received power of the downlink, PR _ D is the rated transmission power of the downlink, NRBThe number of the sub-carriers is shown, and GR _ D is the rated gain of the downlink;
G0_U＝min(GR_U，G0_D-offset)，
where GR _ U is a nominal gain of the uplink, and offset is a fixed offset between an initial gain of the uplink and an initial gain of the downlink.
3. The method of claim 1, wherein the calculating the received signal strength indication RSSI0_ D in the downlink ideal state and the received signal strength indication RSSI0_ U in the uplink ideal state is performed by:
RSSI0_D＝RSSIdefault_D+GAGC_D-Gdefault_D；
wherein the RSSIdefaultD is a default received signal strength indication, G, of the AGC in the downlinkAGCD is the actual gain of AGC in the downlink, GdefaultD is the default gain of AGC in downlink;
RSSI0_U＝RSSIdefault_U+GAGC_U-Gdefault_U；
wherein the RSSIdefaultU is the default received signal strength indication, G, of the AGC in the uplinkAGCU is the actual gain of AGC in the uplink, GdefaultU is the default gain of AGC in the uplink.
4. The method of claim 3, further comprising, prior to said computing a received signal strength indication RSSI0_ D in the downlink ideal state and a received signal strength indication RSSI0_ U in the uplink ideal state:
automatically adjusting an actual gain G of AGC in a downlink according to an actual measured received signal strength indication RSSI1_ D of the downlinkAGC_D；
Automatically adjusting an actual gain G of AGC in an uplink according to an actually measured received signal strength indication RSSI1_ U of the uplinkAGC_U。
5. The method of claim 4, wherein after the calculating the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state, before the calculating a downlink actual gain G1_ D from the downlink initial gain G0_ D and the RSSI0_ D in the downlink ideal state, further comprises:
automatically adjusting the actual gain G of the APC in the downlink according to the actual transmit power PA _ D of the downlinkAPCD and actual gain G of power amplifier PA in downlinkPAThe sum of (a), (b) and (c) to ensure GAGC_D+GAPC_D+GPA_D＝G0_D；
Automatically adjusting the actual gain G of the APC in the uplink according to the actual transmit power PA _ U of the uplinkAPCU and actual gain G of power amplifier PA in uplinkPAThe sum of _Uto ensure GAGC_U+GAPC_U+GPA_U＝G0_U。
6. An apparatus for automatically controlling gain of a micro repeater, comprising:
a first calculation unit for calculating a downlink initial gain G0_ D and an uplink initial gain G0_ U;
a second calculation unit for calculating a received signal strength indication RSSI0_ D in the downlink ideal state and a received signal strength indication RSSI0_ U in the uplink ideal state;
a third calculating unit, configured to calculate a downlink actual gain G1_ D according to the downlink initial gain G0_ D and the RSSI0_ D in the downlink ideal state, and calculate an uplink actual gain G1_ U according to the uplink initial gain G0_ U and the RSSI0_ U in the uplink ideal state, so as to adjust the gain of the link according to the downlink actual gain G1_ D and the uplink actual gain G1_ U, including: when RSSI0_ D < PR _ D-G0_ D and RSSI0_ U < PR _ U-G0_ U, G1_ D-G0_ D and G1_ U-G0_ U;
when RSSI0_ D is greater than or equal to PR _ D-G0_ D and RSSI0_ U < PR _ U-G0_ U,
G1_D＝min(G0_D，PR_D-RSSI0_D)，G1_U＝G1_D-offset；
when RSSI0_ D < PR _ D-G0_ D, and RSSI0_ U ≧ PR _ U-G0_ U,
G1_D＝G0_D，G1_U＝min(G0_U，PR_U-RSSI0_U)；
when RSSI0_ D ≧ PR _ D-G0_ D, and RSSI0_ U ≧ PR _ U-G0_ U,
g1_ D-min (G0_ D, PR _ D-RSSI0_ D), G1_ U-min (G0_ U, PR _ U-RSSI0_ U), where PR _ D is the nominal transmit power of the downlink, offset is the fixed offset between the initial gain of the uplink and the initial gain of the downlink, PR _ U is the nominal transmit power of the uplink, and G0_ U is the initial gain of the uplink.
7. The apparatus of claim 6, wherein the first calculating unit calculates the downlink initial gain G0_ D and the uplink initial gain G0_ U by:
when RSRP _ D < PR _ D-GR _ D-10log (N)RB) G0_ D ═ GR _ D;
when RSRP _ D is more than or equal to PR _ D-GR _ D-10log (N)RB) G0_ D ═ PR _ D-RSRP _ D-10log (N)RB)；
Wherein RSRP _ D is the measured reference signal received power of the downlink, PR _ D is the rated transmission power of the downlink, NRBThe number of the sub-carriers is shown, and GR _ D is the rated gain of the downlink;
G0_U＝min(GR_U，G0_D-offset)，
where GR _ U is a nominal gain of the uplink, and offset is a fixed offset between an initial gain of the uplink and an initial gain of the downlink.
8. The apparatus of claim 6, wherein the second computing unit computes the RSSI0_ D in the downlink ideal state and RSSI0_ U in the uplink ideal state by:
RSSI0_D＝RSSIdefault_D+GAGC_D-Gdefault_D；
wherein the RSSIdefaultD is a default received signal strength indication, G, of the AGC in the downlinkAGCD is the actual gain of AGC in the downlink, GdefaultD is the default gain of AGC in downlink;
RSSI0_U＝RSSIdefault_U+GAGC_U-Gdefault_U；
wherein the RSSIdefaultU is the default received signal strength indication, G, of the AGC in the uplinkAGCU is the actual gain of AGC in the uplink, GdefaultU is the default gain of AGC in the uplink.
9. The apparatus of claim 8, wherein before the second computing unit computes the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state, the method further comprises:
automatically adjusting an actual gain G of AGC in a downlink according to an actual measured received signal strength indication RSSI1_ D of the downlinkAGC_D；
Automatically adjusting an actual gain G of AGC in an uplink according to an actually measured received signal strength indication RSSI1_ U of the uplinkAGC_U。
10. The apparatus as claimed in claim 9, wherein after the second calculating unit calculates the RSSI0_ D in the downlink ideal state and the RSSI0_ U in the uplink ideal state, the third calculating unit calculates the actual gain G1_ D according to the downlink initial gain G0_ D and the RSSI0_ D in the downlink ideal state, further comprising:
automatically adjusting the actual gain G of the APC in the downlink according to the actual transmit power PA _ D of the downlinkAPCD and actual gain G of power amplifier PA in downlinkPAThe sum of (a), (b) and (c) to ensure GAGC_D+GAPC_D+GPA_D＝G0_D；
Automatically adjusting the actual gain G of the APC in the uplink according to the actual transmit power PA _ U of the uplinkAPCU and actual gain G of power amplifier PA in uplinkPAThe sum of _Uto ensure GAGC_U+GAPC_U+GPA_U＝G0_U。
11. A baseband chip, characterized in that, the baseband chip comprises the apparatus for automatic gain control of micro-repeater according to any one of claims 6 to 10.
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| CN110445562B (en) * | 2019-08-15 | 2022-02-08 | 展讯通信（上海）有限公司 | Gain control method, device, relay device and storage medium |
| CN111756461B (en) * | 2020-07-23 | 2022-08-16 | 展讯通信（上海）有限公司 | Self-excitation detection method and system of wireless signal relay amplification device |
| CN114567361B (en) * | 2022-04-28 | 2022-07-15 | 南京燧锐科技有限公司 | FDD/TDD dual-mode microwave direct amplification relay station |
| CN115085788B (en) * | 2022-08-23 | 2022-11-15 | 深圳国人无线通信有限公司 | Method and system for adjusting uplink gain of repeater |
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