CN111313952B - Method and device for intelligently adjusting gain of repeater, repeater and storage medium - Google Patents
Method and device for intelligently adjusting gain of repeater, repeater and storage medium Download PDFInfo
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- CN111313952B CN111313952B CN201811520900.3A CN201811520900A CN111313952B CN 111313952 B CN111313952 B CN 111313952B CN 201811520900 A CN201811520900 A CN 201811520900A CN 111313952 B CN111313952 B CN 111313952B
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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
Abstract
The invention relates to the technical field of wireless network equipment, and discloses a repeater gain intelligent adjustment method, a device, a repeater and a storage medium, wherein the method comprises the following steps: acquiring an input signal and identifying the signal type of the input signal, wherein the input signal is an uplink signal or a downlink signal; if the input signal is a narrowband Internet of things (NB-IoT) signal or a Long Term Evolution (LTE) signal, detecting the peak power of the input signal; and adjusting the signal amplification gain of the corresponding branch of the input signal according to the peak power. The technical scheme provided by the embodiment of the invention can intelligently detect the type of the input signal so as to adopt peak detection on the high peak-to-average ratio signal, avoid the compression of the peak signal in the amplification process of the repeater, and ensure that the repeater can amplify the high peak-to-average ratio signal without distortion, thereby ensuring the signal quality of the output end and the service quality in the coverage range.
Description
Technical Field
The invention relates to the technical field of wireless network equipment, in particular to a method and a device for intelligently adjusting gain of a repeater, the repeater and a storage medium.
Background
A repeater (RP repeater) is a device that connects network lines for bidirectional forwarding of physical signals between two network nodes. The network node is responsible for transmitting information on the physical layers of the two nodes according to bits, and finishing the functions of copying, adjusting and amplifying signals so as to prolong the length of the network. Referring to fig. 1, a forward antenna (donor antenna) or a feeder line is used to receive a downlink signal of a base station into a repeater, a low noise amplifier amplifies a useful signal, suppresses a noise signal in the signal, improves a signal-to-noise ratio (S/N), down-converts the useful signal to an intermediate frequency signal, filters the intermediate frequency signal by a filter, amplifies the intermediate frequency signal by an intermediate frequency, up-converts the intermediate frequency signal to a radio frequency signal, amplifies the radio frequency signal by a power amplifier, and transmits the radio frequency signal to a mobile station by a backward antenna (retransmission antenna); and simultaneously, the mobile station uplink signal is received by a backward antenna and is processed by an uplink amplifying chain along the reverse path: the signal is transmitted to the base station through a low noise amplifier, a down converter, a filter, a middle amplifier, an up converter and a power amplifier, thereby achieving the bidirectional communication between the base station and the mobile station.
At the transmitting end of the conventional repeater, in order to control the maximum output average power of the device, an analog ALC (automatic level control) circuit is added in a transmitting link, and is used for limiting the output level of the power amplifier so that the power amplifier works in a linear region, or when an input signal is greater than a rated input power level, the power amplifier is protected from being damaged due to overdriving. If the amplifier enters a nonlinear region, the signal can be distorted, the intermodulation index of the whole machine is influenced, and the service life of the amplifier can be influenced when the amplifier works in the state for a long time. The ALC in the repeater system mainly functions to adjust the gain of the system link when the input signal level changes greatly, so as to ensure that the system operates in a linear region and maintain the level or power at the output end of the whole repeater to be constant and almost constant.
The traditional repeater adopts an average power detection mode for detecting input power, and in the signal amplification process, the average power of an input signal can enter an ALC state after exceeding a certain value, even if the output power of the repeater keeps stable and unchanged. This method is not problematic For signals with a small peak-to-average ratio, such as GSM (Global System For Mobile Communications) signals. However, when NB-IoT (Narrow Band Internet of Things) or LTE (Long Term Evolution) signals are input to the repeater, the peak power is much higher than the average power due to the high peak-to-average ratio (8-10dB), and the peak power exceeds the maximum amplification capability of the power amplifier before the average power enters into the ALC state with the increase of the input power, which may cause problems such as NB-IoT or LTE signal peak clipping, affecting the signal quality, and causing the service to be executed unsuccessfully.
Disclosure of Invention
The embodiment of the invention provides a repeater gain intelligent adjustment method, a repeater gain intelligent adjustment device, a repeater and a storage medium, and aims to solve the problems that when a high peak-to-average ratio signal is amplified by a traditional GSM repeater, the peak clipping of the high peak-to-average ratio signal is caused by overlarge input power, the quality of the high peak-to-average ratio signal is influenced, and the service cannot be smoothly executed.
In a first aspect, an embodiment of the present invention provides an intelligent adjusting method for a repeater gain, including:
acquiring an input signal and identifying the signal type of the input signal, wherein the input signal is an uplink signal or a downlink signal;
if the input signal is a narrowband Internet of things (NB-IoT) signal or a Long Term Evolution (LTE) signal, detecting the peak power of the input signal;
and adjusting the signal amplification gain of the corresponding branch of the input signal according to the peak power.
In a second aspect, an embodiment of the present invention provides a repeater, including: the monitoring system comprises an uplink mode identification module, an uplink peak value detection module, a downlink mode identification module, a downlink peak value detection module and a monitoring mainboard;
the uplink mode identification module is used for acquiring an uplink signal and identifying the signal type of the uplink signal, and if the uplink signal is an NB-IoT or LTE signal, the uplink signal is input into the uplink peak value detection module;
the uplink peak value detection module is used for detecting the peak value power of the uplink signal and inputting the peak value power of the uplink signal into the monitoring mainboard;
the downlink pattern recognition module is used for acquiring downlink signals and recognizing the signal types of the downlink signals, and inputting the downlink signals into the downlink peak value detection module if the downlink signals are NB-IoT or LTE signals;
the downlink peak value detection module is used for detecting the peak value power of the downlink signal and inputting the peak value power of the downlink signal into the monitoring mainboard;
the monitoring main board is used for adjusting the signal amplification gain of the uplink branch according to the peak power of the uplink signal and adjusting the signal amplification gain of the downlink branch according to the peak power of the downlink signal.
In a third aspect, an embodiment of the present invention provides an intelligent adjusting device for gain of a repeater, including:
the signal type identification module is used for acquiring an input signal and identifying the signal type of the input signal, wherein the input signal is an uplink signal or a downlink signal;
the peak power detection module is used for detecting the peak power of the input signal if the input signal is an NB-IoT signal or an LTE signal;
and the gain adjusting module is used for adjusting the signal amplification gain of the corresponding branch of the input signal according to the peak power.
In a fourth aspect, an embodiment of the invention provides a computer-readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of any of the methods described above.
The technical scheme provided by the embodiment of the invention can intelligently identify the input signal, adopt different processing modes for different types of signals, adopt a mean detection mode for low peak-to-average ratio signals (such as GSM signals) and adopt peak detection for high peak-to-average ratio signals (such as NB-IoT signals and LTE signals), avoid compression of peak signals in the amplification process of the repeater, ensure that the repeater can amplify the high peak-to-average ratio signals without distortion, ensure that all types of signals can be linearly amplified, and further ensure the signal quality of the output end and the service quality in a coverage range. In addition, the scheme of the embodiment can be realized on the basis of the original GSM repeater, and a special repeater is not required to be additionally arranged aiming at the high peak-to-average ratio signal, so that the equipment investment and the cost are reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of an application scenario of an intelligent adjusting method for gain of a repeater according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for intelligently adjusting gain of a repeater according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the operation of the ALC circuit;
FIG. 4 is a schematic structural diagram of an intelligent adjusting device for gain of a repeater according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a 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.
For convenience of understanding, terms referred to in the embodiments of the present invention are explained below:
the peak power is the instantaneous power of a spike that appears in the signal with a certain probability, and the probability is usually 0.01%.
Mean power refers to the actual power output by the system.
The Peak-to-Average Power Ratio (PAPR-Peak to Average Power Ratio), abbreviated as Peak-to-Average Power Ratio (PAP), refers to the Ratio of Peak Power to Average Power at a certain probability.
Both NB-IoT and LTE employ OFDM modulation, and OFDM systems can provide greater coverage, better transmission quality, higher data rates, and spectral efficiency. However, since the OFDM symbol is formed by superimposing a plurality of independently modulated subcarrier signals, when the phases of the respective subcarriers are the same or close to each other, the superimposed signal is modulated by the same initial phase signal, so as to generate a larger instantaneous power peak, thereby further resulting in a higher peak-to-average power ratio. Because the dynamic range of a general power amplifier is limited, a signal with a large peak-to-average ratio easily enters a nonlinear region of the power amplifier, so that nonlinear distortion is generated on the signal, obvious spectrum spreading interference and in-band signal distortion are caused, and the performance of the whole system is seriously reduced. High peak-to-average ratio has become a major technical obstacle in OFDM systems.
Any number of elements in the drawings are by way of example and not by way of limitation, and any nomenclature is used solely for differentiation and not by way of limitation.
In a specific practical process, because the traditional GSM repeater detects according to the mean power, when the traditional GSM repeater amplifies NB-IoT or LTE signals, when the input power of the NB-IoT or LTE signals reaches the mean start control point, the peak power of the NB-IoT or LTE signals greatly exceeds the start control point, so that the power amplifier enters a saturation area, the peak signals are compressed due to the influence of the saturation of the power amplifier on the output signals, peak clipping is generated, the NB-IoT or LTE signal quality in the coverage area of the repeater is influenced, and the service cannot be smoothly executed.
Therefore, the inventor of the invention considers that the signal type identification function is added in the existing repeater, namely, the input signal can be identified according to the input signal type, and different processing modes are adopted for different types of signals after identification; when the input signal is identified to be an NB-IoT or LTE signal, detecting the NB-IoT or LTE signal according to the peak power, and ensuring that the repeater station enters an ALC (automatic level control) state when the peak power of the NB-IoT or LTE signal reaches a specified level; and for the GSM signal, the average power detection mode is still adopted, so that on the basis of the original GSM repeater, all types of signals can be linearly amplified, and the signal quality and the service performance of a coverage area are ensured. Because the original GSM repeater is reused, the equipment investment and the cost are reduced.
Having described the general principles of the invention, various non-limiting embodiments of the invention are described in detail below.
Referring to fig. 2, an embodiment of the present invention provides an intelligent adjusting method for gain of a repeater, including the following steps:
s201, acquiring an input signal and identifying the signal type of the input signal, wherein the input signal is an uplink signal or a downlink signal.
In this embodiment, the input signal is a signal that is input to the repeater and has not been subjected to signal amplification processing. The input signal in the uplink branch is an uplink signal, and the input signal in the downlink branch is a downlink signal.
In this embodiment, the signal types of the input signals include NB-IoT signals, LTE signals, and GSM signals. In actual application, the signal types can be increased according to the requirements, and corresponding processing modes can be set for the increased signal types.
In particular, the signal type of the input signal can be identified according to the bandwidth of the input signal.
The LTE signal has six bandwidths of 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20 MHz. The bandwidth of the GSM signal and the NB-IoT signal is 200 kHz. In specific implementation, when the bandwidth of the input signal is detected to be any one of 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz or 20MHz, the input signal is determined to be an LTE signal; when the bandwidth of the input signal is detected to be 200kHz, the subcarrier interval of the input signal is further detected, when the subcarrier interval of the input signal is 15kHz, the input signal is determined to be an NB-IoT signal, and when the subcarrier interval of the input signal is 200kHz, the input signal is determined to be a GSM signal.
S202, if the input signal is an NB-IoT signal or an LTE signal, detecting the peak power of the input signal.
In Specific implementation, the detection of the peak power may be implemented by using an Analog-to-Digital Converter (ADC) and a Digital signal processor, where the Digital signal processor may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device) processor. The method includes the steps of collecting an input signal by using an analog-to-digital converter, sending collected data to a digital signal processor for processing, specifically, calculating peak power of the input signal by using a pulse power calculation method through the digital signal processor, namely detecting a peak signal and a pulse width corresponding to the peak signal according to the collected signal, and calculating the pulse power corresponding to the peak signal according to the pulse width corresponding to the peak signal to serve as the peak power of the input signal.
And S203, adjusting the signal amplification gain of the corresponding branch of the input signal according to the peak power.
In specific implementation, if the input signal is a GSM signal, the mean power of the input signal is detected, and the signal amplification gain of the branch corresponding to the input signal is adjusted according to the mean power.
In specific implementation, when the peak power of an NB-IoT signal or an LTE signal exceeds the maximum input power, adjusting the signal amplification gain of a branch corresponding to the input signal so as to enable the actual maximum output power of the branch not to exceed the rated maximum output power; when the average power of the GSM signal exceeds the maximum input power, the signal amplification gain of the branch corresponding to the input signal is adjusted, so that the actual maximum output power of the branch does not exceed the rated maximum output power.
In this embodiment, the output power of the uplink branch and the downlink branch is dynamically adjusted by controlling the ALC circuit in the repeater. The implementation of ALC circuit must have a current (or voltage) that changes with the strength of the extraneous signal, and then the current (or voltage) is used to control the gain of the relevant stage amplifier in the system chain. The ALC circuit is actually one of feedback control circuits, and generally can be divided into two parts, namely a gain-controlled amplifying circuit and a control voltage forming circuit, by adopting the working principle of negative feedback. The ALC circuit works as shown in fig. 3, Vr is a reference voltage, the output power Po can be controlled by changing the magnitude of Vr, the gain-controlled amplifying circuit 31 is located in the forward amplifying path, the gain of the gain-controlled amplifying circuit 31 changes with the control voltage Vc, the gain-controlled amplifying circuit 31 comprises a voltage-controlled attenuator 311 and an amplifying circuit 312, the basic components of the control voltage forming circuit 32 are a detector 321 and an ALC comparator 322, the output signal of the link is Po, the coupling part signal is detected by the detector to generate a voltage Vo, and the voltage Vo is compared with the set Vr to generate the voltage Vc for controlling the voltage-controlled attenuator 311. When the input signal Pi increases, Vo and Vc also increase. As a negative feedback network, Vc is increased to reduce the gain of the amplifying circuit, so that the variation of the output signal is obviously smaller than that of the input signal, and the purpose of automatic gain control is achieved. That is, the ALC circuit mainly works on the principle that the voltage-controlled attenuator 311 is controlled by the dc-ramp voltage that reflects the amplitude variation trend of the signal, so as to control the output level.
In the embodiment, the reference voltage Vr of the ALC circuit is adjusted by the monitoring mainboard in the repeater according to the peak power of the NB-IoT signal or the LTE signal, namely when the peak power of the NB-IoT signal or the LTE signal exceeds the maximum input power, the reference voltage Vr of the ALC circuit is adjusted so that the actual maximum output power Po of the branch circuit does not exceed the rated maximum output power; the monitoring main board adjusts the reference voltage Vr of the ALC circuit according to the mean power of the GSM signal, namely when the mean power of the GSM signal exceeds the maximum input power, the reference voltage Vr of the ALC circuit is adjusted, so that the actual maximum output power Po of the branch circuit does not exceed the rated maximum output power.
Taking a GSM and NB-IoT dual-mode repeater operating at 900MHz as an example, assuming that the downlink gain is 40dB and the rated maximum output power of the downlink branch is 33dBm, the theoretical maximum downlink input power should be Pin max＝33-40＝-7dBm。
When the input signal is a GSM signal, the input power is detected according to the average value, and when the average value is the input power PinWhen the output power P of the repeater is less than or equal to-7 dBmoutPin +40 dB; when mean value input power PinWhen > -7dBm, the repeater station enters into ALC state and outputs power Pout33dBm, the actual maximum output power of the repeater is ensured not to exceed the rated maximum output power.
When the input signal is NB-IoT signal, the input power is detected according to the peak value, when the peak value is input power PinWhen the peak output power P of the repeater is less than or equal to-7 dBmout＝Pin+40dB, the average output power of the repeater is about Pout-PAPNB-IoT(ii) a When peak input power PinWhen > -7dBm, the repeater station enters into ALC state, peak output power PoutAt 33dBm, the average output power of the repeater is about 33dBm-PAPNB-IoT。PAPNB-IoTPAP being the peak-to-average ratio of NB-IoTNB-IoTAbout 8-10 dB.
The repeater gain intelligent adjustment method provided by the embodiment of the invention can intelligently identify input signals, adopts different processing modes for different types of signals, adopts a mean detection mode for low peak-to-average ratio signals (such as GSM signals) and adopts peak detection for high peak-to-average ratio signals (such as NB-IoT signals and LTE signals), avoids compression of peak signals in the amplifying process of the repeater, enables the repeater to amplify the high peak-to-average ratio signals without distortion, and ensures the signal quality of an output end and the service quality in a coverage range. Therefore, the method of the embodiment can ensure that all types of signals can be linearly amplified, and ensure the signal quality and the service performance of the coverage area.
In addition, the method of the embodiment can be realized on the basis of the original GSM repeater, and a special repeater is not required to be additionally arranged aiming at the high peak-to-average ratio signal, so that the equipment investment and the cost are reduced.
As shown in fig. 4, based on the same inventive concept as the above-mentioned repeater gain intelligent adjustment method, the embodiment of the present invention further provides an intelligent repeater gain adjustment apparatus 40, which includes a signal type identification module 401, a peak power detection module 402, and a gain adjustment module 403.
The signal type identification module 401 is configured to acquire an input signal and identify a signal type of the input signal, where the input signal is an uplink signal or a downlink signal;
the peak power detection module 402 is configured to detect a peak power of an input signal if the input signal is a narrowband internet of things NB-IoT signal or a long term evolution LTE signal;
the gain adjusting module 403 is configured to adjust a signal amplification gain of a branch corresponding to the input signal according to the peak power.
Further, the gain adjusting module 403 is specifically configured to adjust the signal amplification gain of the branch corresponding to the input signal when the peak power exceeds the maximum input power, so that the actual maximum output power of the branch does not exceed the rated maximum output power.
Further, the repeater gain intelligent adjusting device 50 of the embodiment of the present invention further includes a mean power detection module for detecting the mean power of the input signal if the input signal is a GSM signal.
Correspondingly, the gain adjusting module is further configured to adjust a signal amplification gain of a branch corresponding to the input signal according to the average power.
Further, the signal type identification module 401 is specifically configured to identify the signal type of the input signal according to the bandwidth of the input signal.
The repeater gain intelligent adjusting device and the repeater gain intelligent adjusting method provided by the embodiment of the invention adopt the same inventive concept, can obtain the same beneficial effect, and are not repeated herein.
As shown in fig. 5, an embodiment of the present invention provides a repeater, including: an uplink pattern identification module 501, an uplink peak detection module 502, a downlink pattern identification module 503, a downlink peak detection module 504, and a monitoring main board 505.
The uplink mode identification module is used for acquiring an uplink signal and identifying the signal type of the uplink signal, and if the uplink signal is an NB-IoT or LTE signal, the uplink signal is input into the uplink peak value detection module.
The uplink peak value detection module is used for detecting the peak value power of the uplink signal and inputting the peak value power of the uplink signal into the monitoring mainboard.
The downlink pattern recognition module is used for acquiring downlink signals and recognizing the signal types of the downlink signals, and inputting the downlink signals into the downlink peak value detection module if the downlink signals are NB-IoT or LTE signals.
The downlink peak value detection module is used for detecting the peak value power of the downlink signal and inputting the peak value power of the downlink signal into the monitoring mainboard.
The monitoring main board is used for adjusting the signal amplification gain of the uplink branch according to the peak power of the uplink signal and adjusting the signal amplification gain of the downlink branch according to the peak power of the downlink signal.
In fig. 5, a downlink signal sent by a base station is transmitted to a first duplexer 511 through an output end of a first coupler 510, the downlink signal is distributed to downlink branches by the first duplexer 511, amplified by a first low noise amplifier 512, a first frequency band filter 513 and a first power amplifier 514, combined by a second duplexer 521, transmitted to an output port of a repeater, and transmitted to a mobile station; an uplink signal sent by the mobile station is transmitted into the second duplexer 521 through the output end of the second coupler 520, the second duplexer 521 distributes the uplink signal to the uplink branch, and the uplink signal is amplified by the second low noise amplifier 522, the second band filter 523 and the second power amplifier 524, then is combined by the first duplexer 511, transmitted to the output port of the repeater, and then is transmitted to the base station. The downlink pattern recognition module 503 obtains a downlink signal from the coupling end of the first coupler 510, the downlink signal is detected by the downlink pattern recognition module 503 and the downlink peak detection module 504, and the signal amplification gain of the downlink branch is adjusted by the monitoring main board 505. The uplink pattern recognition module 501 obtains an uplink signal from the coupling end of the second coupler 520, the uplink pattern recognition module 501 and the uplink peak detection module 502 detect the uplink signal, and the monitoring main board 505 adjusts the signal amplification gain of the uplink branch. The ALC circuitry is not shown in fig. 5.
Further, the monitoring motherboard is specifically configured to: when the peak power of the uplink signal exceeds the maximum uplink input power, adjusting the signal amplification gain of the uplink branch so as to enable the actual maximum output power of the uplink branch not to exceed the rated maximum output power; and when the peak power of the downlink signal exceeds the maximum downlink input power, adjusting the signal amplification gain of the downlink branch so as to enable the actual maximum output power of the downlink branch not to exceed the rated maximum output power.
The monitoring main board realizes the control of the signal amplification gain of the uplink branch or the downlink branch by adjusting the reference voltage of the ALC circuit, and the specific implementation method refers to the relevant examples in the repeater gain intelligent adjustment method, and is not described again.
Furthermore, the uplink mode identification module is further configured to input the uplink signal into the monitoring motherboard if the uplink signal is a GSM signal. Correspondingly, the monitoring main board is further configured to detect a mean power of the uplink signal, and adjust a signal amplification gain of the uplink branch according to the mean power of the uplink signal.
The downlink mode identification module is also used for inputting the downlink signal into the monitoring mainboard if the downlink signal is a GSM signal. Correspondingly, the monitoring main board is further configured to detect a mean power of the downlink signal, and adjust a signal amplification gain of the downlink branch according to the mean power of the downlink signal.
Further, the uplink pattern recognition module is specifically configured to recognize a signal type of the uplink signal according to a bandwidth of the uplink signal. The downlink pattern recognition module is specifically configured to recognize a signal type of the downlink signal according to a bandwidth of the downlink signal. The method for identifying the signal type by the uplink mode identification module and the downlink mode identification module can refer to the relevant examples in the repeater gain intelligent adjustment method, and is not described again.
Referring to fig. 5, the working flow of the downlink branch of the repeater of this embodiment is as follows:
step one, after entering the input end of the repeater, a downlink signal passes through the first coupler 510, the output end of the first coupler 510 enters the first duplexer 511, the first duplexer 511 distributes the downlink signal to downlink branches, the downlink signal is amplified by the first low noise amplifier 512, the first frequency band filter 513 and the first power amplifier 514, then the downlink signal is combined by the first duplexer 511 and transmitted to the output port of the repeater, and the signal is sent out by a backward antenna; the coupling end signal of the first coupler 510 enters the downlink mode identification module 503;
secondly, the downlink pattern recognition module 503 analyzes and processes the downlink signal input therein, and determines what signal type the downlink signal belongs to according to the signal characteristics (such as frequency, bandwidth, etc.); when the downlink signal is an NB-IoT or LTE signal, the downlink signal is input to the downlink peak detection module 504; when the downlink signal is a GSM signal, the downlink signal is input to the monitoring main board 505;
thirdly, the downlink peak detection module 504 performs peak power detection on NB-IoT or LTE signals and transmits the detected peak power to the monitoring motherboard 505;
fourthly, when the monitoring main board 505 receives the GSM signal sent by the downlink mode identifying module 503, the monitoring main board 505 performs mean power detection on the received GSM signal, and controls the reference voltage of the ALC circuit of the downlink branch according to the detected mean power to adjust the gain of each power amplifier (including the first low noise amplifier 512 and the first power amplifier 514) in the downlink branch, so that the downlink branch enters into the ALC state when the mean power of the downlink signal exceeds the maximum downlink input power to ensure the quality of the downlink signal; when the monitoring main board 505 receives the peak power sent by the downlink peak detection module 504, the monitoring main board 505 controls the reference voltage of the ALC circuit of the downlink branch according to the received peak power to adjust the gain of each power amplifier (including the first low noise amplifier 512 and the first power amplifier 514) in the downlink branch, so that the downlink branch enters into the ALC state when the peak power of the downlink signal exceeds the maximum downlink input power, thereby ensuring the signal quality.
The working flow of the uplink branch is similar to that of the downlink branch, but the frequency and the signal transmission direction are different, and are not described again.
In this embodiment, the uplink pattern recognition module and the uplink peak detection module may be implemented by two independent electronic devices, and the uplink pattern recognition module and the uplink peak detection module may also be provided in two functional modules in the same electronic device. The downlink mode identification module and the downlink peak detection module can be realized by two independent electronic devices, and the downlink mode identification module and the downlink peak detection module can also be arranged in two functional modules in the same electronic device.
The repeater provided by the embodiment of the invention has the function of gain intelligent adjustment, can intelligently identify input signals, adopts different processing modes for different types of signals, adopts a mean detection mode for low peak-to-average ratio signals (such as GSM signals) and adopts peak detection for high peak-to-average ratio signals (such as NB-IoT signals and LTE signals), avoids the compression of peak signals in the amplification process of the repeater, enables the repeater to amplify the high peak-to-average ratio signals without distortion, and ensures the signal quality of an output end and the service quality in a coverage range. Therefore, the repeater of the embodiment can ensure that all types of signals can be linearly amplified, and ensure the signal quality and the service performance of a coverage area.
In addition, the repeater of the embodiment only needs to add the uplink mode identification module, the uplink peak detection module, the downlink mode identification module and the downlink peak detection module on the basis of the original GSM repeater, so that a special repeater is not required to be additionally arranged for the high peak-to-average ratio signal, and the equipment investment and the cost are reduced.
An embodiment of the present invention provides a computer-readable storage medium for storing computer program instructions for the electronic device, which includes a program for executing the method for intelligently adjusting gain of a repeater.
The computer storage media may be any available media or data storage device that can be accessed by a computer, including but not limited to magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.
The above embodiments are only used to describe the technical solutions of the present application in detail, but the above embodiments are only used to help understanding the method of the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention. Variations or substitutions that may be readily apparent to one skilled in the art are intended to be included within the scope of the embodiments of the present invention.
Claims (8)
1. An intelligent gain adjustment method for a repeater is characterized by comprising the following steps:
acquiring an input signal and identifying the signal type of the input signal, wherein the input signal is an uplink signal or a downlink signal;
if the input signal is a narrowband Internet of things (NB-IoT) signal or a Long Term Evolution (LTE) signal with a high peak-to-average ratio, detecting the peak power of the input signal;
adjusting the signal amplification gain of the branch corresponding to the input signal according to the peak power;
if the input signal is a global system for mobile communications (GSM) signal with a low peak-to-average ratio, detecting the average power of the input signal;
and adjusting the signal amplification gain of the branch corresponding to the input signal according to the average power.
2. The method of claim 1, wherein adjusting the signal amplification gain of the corresponding branch of the input signal according to the peak power comprises:
and when the peak power exceeds the maximum input power, adjusting the signal amplification gain of the branch corresponding to the input signal so as to enable the actual maximum output power of the branch not to exceed the rated maximum output power.
3. The method of claim 1 or 2, wherein the identifying the signal type of the input signal comprises:
identifying a signal type of the input signal according to a bandwidth of the input signal.
4. A repeater, comprising: the monitoring system comprises an uplink mode identification module, an uplink peak value detection module, a downlink mode identification module, a downlink peak value detection module and a monitoring mainboard;
the uplink mode identification module is used for acquiring an uplink signal and identifying the signal type of the uplink signal, and if the uplink signal is an NB-IoT or LTE signal with a high peak-to-average ratio, the uplink signal is input into the uplink peak value detection module;
the uplink peak detection module is used for detecting the peak power of the uplink signal and inputting the peak power of the uplink signal into the monitoring mainboard;
the downlink pattern recognition module is used for acquiring a downlink signal and recognizing the signal type of the downlink signal, and inputting the downlink signal into the downlink peak detection module if the downlink signal is an NB-IoT or LTE signal;
the downlink peak detection module is used for detecting the peak power of the downlink signal and inputting the peak power of the downlink signal into the monitoring mainboard;
the monitoring main board is used for adjusting the signal amplification gain of the uplink branch circuit according to the peak power of the uplink signal and adjusting the signal amplification gain of the downlink branch circuit according to the peak power of the downlink signal;
the uplink mode identification module is further used for inputting the uplink signal into the monitoring main board if the uplink signal is a GSM signal with a low peak-to-average ratio;
the monitoring main board is further used for detecting the mean power of the uplink signal and adjusting the signal amplification gain of the uplink branch according to the mean power of the uplink signal;
the downlink mode identification module is also used for inputting the downlink signal into the monitoring mainboard if the downlink signal is a GSM signal with a low peak-to-average ratio;
the monitoring main board is further configured to detect a mean power of the downlink signal, and adjust a signal amplification gain of the downlink branch according to the mean power of the downlink signal.
5. The repeater according to claim 4, wherein the monitoring motherboard is specifically configured to: when the peak power of the uplink signal exceeds the maximum uplink input power, adjusting the signal amplification gain of the uplink branch so as to enable the actual maximum output power of the uplink branch not to exceed the rated maximum output power; and when the peak power of the downlink signal exceeds the maximum downlink input power, adjusting the signal amplification gain of the downlink branch so as to enable the actual maximum output power of the downlink branch not to exceed the rated maximum output power.
6. The repeater according to claim 4 or 5, wherein the uplink pattern recognition module is specifically configured to recognize a signal type of the uplink signal according to a bandwidth of the uplink signal;
the downlink pattern recognition module is specifically configured to recognize a signal type of the downlink signal according to a bandwidth of the downlink signal.
7. The utility model provides a repeater gain intelligent regulation device which characterized in that includes:
the signal type identification module is used for acquiring an input signal and identifying the signal type of the input signal, wherein the input signal is an uplink signal or a downlink signal;
a peak power detection module, configured to detect a peak power of the input signal if the input signal is an NB-IoT signal with a high peak-to-average ratio or an LTE signal;
the gain adjusting module is used for adjusting the signal amplification gain of the branch corresponding to the input signal according to the peak power;
the device also comprises a mean power detection module used for detecting the mean power of the input signal if the input signal is a GSM signal with low peak-to-average ratio;
and the gain adjusting module is also used for adjusting the signal amplification gain of the corresponding branch of the input signal according to the average power.
8. A computer-readable storage medium, on which computer program instructions are stored, which program instructions, when executed by a processor, carry out the steps of the method according to any one of claims 1 to 3.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1993904A (en) * | 2004-05-13 | 2007-07-04 | 威德菲公司 | Non-frequency translating repeater with detection and media access control |
| CN202282871U (en) * | 2011-09-01 | 2012-06-20 | 京信通信系统（中国）有限公司 | Digital repeater system |
| KR20120128411A (en) * | 2011-05-17 | 2012-11-27 | 주식회사 에이디알에프코리아 | Wireless switching device for mobile communication and control method with PAPR detection |
| CN103237340A (en) * | 2013-04-24 | 2013-08-07 | 京信通信系统（广州）有限公司 | Automatic level control circuit, method and communication device |
| CN103812811A (en) * | 2012-11-07 | 2014-05-21 | 京信通信系统（中国）有限公司 | Automatic control apparatus and method of digital signal peak power |
| CN103888088A (en) * | 2014-03-20 | 2014-06-25 | 京信通信系统（广州）有限公司 | Power amplifier protection system based on ALC |
| CN104169815A (en) * | 2011-08-23 | 2014-11-26 | 威尔逊电子有限责任公司 | Verifying oscillation in amplifiers and the mitigation thereof |
| CN104682890A (en) * | 2013-11-26 | 2015-06-03 | 台扬科技股份有限公司 | Radio frequency signal amplifying system |
| CN104869627A (en) * | 2014-02-26 | 2015-08-26 | 中国移动通信集团公司 | Signal amplification gain adjustment method, device and related equipment |
| CN105407523A (en) * | 2014-09-10 | 2016-03-16 | 中兴通讯股份有限公司 | Method and apparatus for signal gain control |
| CN105992330A (en) * | 2015-01-28 | 2016-10-05 | 中国移动通信集团公司 | Gain adjustment method and device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120300680A1 (en) * | 2011-05-27 | 2012-11-29 | Qualcomm Incorporated | Transmission schemes for relay |
| CN105611620B (en) * | 2014-11-20 | 2020-03-17 | 中兴通讯股份有限公司 | Power amplifier voltage adjusting method and device |
-
2018
- 2018-12-12 CN CN201811520900.3A patent/CN111313952B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1993904A (en) * | 2004-05-13 | 2007-07-04 | 威德菲公司 | Non-frequency translating repeater with detection and media access control |
| KR20120128411A (en) * | 2011-05-17 | 2012-11-27 | 주식회사 에이디알에프코리아 | Wireless switching device for mobile communication and control method with PAPR detection |
| CN104169815A (en) * | 2011-08-23 | 2014-11-26 | 威尔逊电子有限责任公司 | Verifying oscillation in amplifiers and the mitigation thereof |
| CN202282871U (en) * | 2011-09-01 | 2012-06-20 | 京信通信系统（中国）有限公司 | Digital repeater system |
| CN103812811A (en) * | 2012-11-07 | 2014-05-21 | 京信通信系统（中国）有限公司 | Automatic control apparatus and method of digital signal peak power |
| CN103237340A (en) * | 2013-04-24 | 2013-08-07 | 京信通信系统（广州）有限公司 | Automatic level control circuit, method and communication device |
| CN104682890A (en) * | 2013-11-26 | 2015-06-03 | 台扬科技股份有限公司 | Radio frequency signal amplifying system |
| CN104869627A (en) * | 2014-02-26 | 2015-08-26 | 中国移动通信集团公司 | Signal amplification gain adjustment method, device and related equipment |
| CN103888088A (en) * | 2014-03-20 | 2014-06-25 | 京信通信系统（广州）有限公司 | Power amplifier protection system based on ALC |
| CN105407523A (en) * | 2014-09-10 | 2016-03-16 | 中兴通讯股份有限公司 | Method and apparatus for signal gain control |
| CN105992330A (en) * | 2015-01-28 | 2016-10-05 | 中国移动通信集团公司 | Gain adjustment method and device |
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| Publication number | Publication date |
|---|---|
| CN111313952A (en) | 2020-06-19 |
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