CN110545576B - Power amplifier module, power adjustment method and remote radio unit - Google Patents
Power amplifier module, power adjustment method and remote radio unit Download PDFInfo
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- CN110545576B CN110545576B CN201910903554.5A CN201910903554A CN110545576B CN 110545576 B CN110545576 B CN 110545576B CN 201910903554 A CN201910903554 A CN 201910903554A CN 110545576 B CN110545576 B CN 110545576B
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- 230000003321 amplification Effects 0.000 claims description 42
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- 229920006395 saturated elastomer Polymers 0.000 claims description 7
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
- H04W52/226—TPC being performed according to specific parameters taking into account previous information or commands using past references to control power, e.g. look-up-table
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a power amplifier module, a power adjustment method and a remote radio unit, wherein the power amplifier module comprises: the device comprises an attenuation circuit, a first power amplifying tube, a coupler, a micro control unit and a control circuit; the first power amplifying tube is used for amplifying the radio frequency signal from the attenuation circuit and transmitting the amplified radio frequency signal to the coupler; the output end of the coupler is connected with the control circuit, and the coupler is used for coupling out part of signals from the received radio frequency signals to the control circuit; the micro control unit is electrically connected with the control circuit and is used for determining the threshold voltage corresponding to the current time period of the power amplifier module according to the historical traffic corresponding to the current time period of the power amplifier module; the attenuation circuit is electrically connected with the control circuit and is used for adjusting the maximum power of the power amplifier module according to the control voltage output by the control circuit, wherein the control voltage is specifically determined by the control circuit according to the threshold voltage and the detection voltage corresponding to part of signals.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a power amplifier module, a power adjustment method, and a remote radio unit.
Background
In the wireless communication process, the communication quality can be effectively controlled through automatic power adjustment, the power resource is saved, and the purposes of energy conservation and environmental protection are achieved under the condition of meeting the communication.
In the prior art, the power adjustment is performed by adjusting the transmitting power of the communication device, or reversely adjusting the input power of the power amplification module according to the output power, or adjusting the input power of the power amplification module according to the power of the base station, and the adjustment methods do not combine the actual situation of the traffic, so that the adjustment efficiency is low and the accuracy is low relatively.
Therefore, the existing power adjustment method has the technical problem of poor adjustment effect.
Disclosure of Invention
The embodiment of the invention provides a power amplifier module, a power adjustment method and a remote radio unit, which are used for solving the technical problem that the existing power adjustment method is poor in adjustment effect.
In a first aspect, an embodiment of the present invention provides a power amplifier module, including:
the device comprises an attenuation circuit, a first power amplifying tube, a coupler, a micro control unit and a control circuit; wherein,
the input end of the attenuation circuit is connected with the input end of the power amplifier module;
the output end of the attenuation circuit is connected with the input end of the coupler;
The first power amplifying tube is respectively and electrically connected with the attenuation circuit and the coupler, and is used for amplifying the radio frequency signal from the attenuation circuit and transmitting the amplified radio frequency signal to the coupler;
the output end of the coupler is connected with the control circuit, and the coupler is used for coupling out part of signals from the received radio frequency signals to the control circuit;
the micro control unit is electrically connected with the control circuit and is used for determining the threshold voltage corresponding to the current time period of the power amplifier module according to the historical traffic corresponding to the current time period of the power amplifier module;
the attenuation circuit is electrically connected with the control circuit and is used for adjusting the maximum power of the power amplifier module according to the control voltage output by the control circuit, wherein the control voltage is specifically determined by the control circuit according to the threshold voltage and the detection voltage corresponding to the partial signal.
Optionally, the power amplifier module further includes a communication service statistics module electrically connected to the micro control unit, where the communication service statistics module is configured to store a correspondence table including a time period, a traffic volume, and a control voltage.
Optionally, after the current time period is over, the communication service statistics module is configured to read a service volume and a control voltage corresponding to the current time, and update the correspondence table.
Optionally, the power amplifier module further includes a comparison circuit, where the comparison circuit is electrically connected to the micro control unit, and the comparison circuit is configured to compare a reference voltage with the control voltage and output a state judgment voltage to the micro control unit, where the reference voltage is used to characterize a voltage corresponding to the power amplifier module when the power amplifier module is at maximum saturated power.
Optionally, if the control voltage is smaller than the reference voltage, the state judgment voltage is at a high level, and the micro control unit is used for determining that the power amplification module is in a power starting control state and controlling the attenuation circuit to increase the maximum power of the power amplification module by a first preset value.
Optionally, if the control voltage is greater than the reference voltage, the state determining voltage is at a low level, and the micro control unit is configured to determine that the power amplifier module is not in the power control state, and control the attenuation circuit to reduce the maximum power of the power amplifier module by a second preset value, where the second preset value is smaller than the first preset value.
Optionally, after the attenuation circuit adjusts the maximum power of the power amplifier module, the comparison circuit is configured to compare the reference voltage with the control voltage at the time, and output a comparison result to the micro control unit, where the micro control unit is configured to determine whether the power amplifier module is in the power control state according to the comparison result.
Optionally, if the power amplifier module is in the power start-up state, the micro control unit determines the duration of the power amplifier module in the power start-up state, and if the duration is longer than a preset duration, the micro control unit is used for determining that the power amplifier module is in a busy state and generating an alarm indication.
Optionally, if the power amplifier module is not in the power control state, the micro control unit is configured to control the attenuation circuit to reduce the maximum power of the power amplifier module by a third preset value.
Optionally, the power amplification module further includes at least one second power amplification tube connected to the output end of the coupler, and is configured to power amplify the radio frequency signal output by the coupler.
Optionally, the power amplification module further includes an isolator connected to an output end of the at least one second power amplification tube, where the isolator is configured to receive the radio frequency signal amplified by the at least one second power amplification tube and send the radio frequency signal to an antenna.
In a second aspect, an embodiment of the present invention further provides a remote radio unit, including: the antenna comprises a baseband module, an antenna and the power amplifier module arranged between the baseband module and the antenna, wherein the baseband module is used for generating radio frequency signals, and the power amplifier module is used for carrying out power adjustment on the radio frequency signals from the baseband module and sending the adjusted radio frequency signals to the antenna.
In a third aspect, an embodiment of the present invention further provides a power adjustment method, applied to a power amplifier module, where the power amplifier module attenuation circuit, the first power amplifier tube, the coupler, the micro control unit, and the control circuit, the method includes:
amplifying the radio frequency signal from the attenuation circuit through the first power amplifying tube, and sending the amplified radio frequency signal to the coupler;
coupling out a portion of the signal from the received video signal to the control circuit via the coupler;
determining, by the micro control unit, a threshold voltage corresponding to the power amplifier module in a current time period, where the threshold voltage is specifically determined by the micro control unit according to a historical traffic volume in the current time period;
Receiving, by the control circuit, the threshold voltage and a detection voltage corresponding to the partial signal;
and receiving the control voltage from the control circuit through the attenuation circuit, and adjusting the maximum power of the power amplifier module.
Optionally, the determining, by the micro control unit, that the power amplifier module corresponds to the threshold voltage in the current time period includes:
storing a corresponding relation table comprising time periods, traffic and control voltages through a communication service statistics module electrically connected with the micro control unit;
and reading the corresponding relation table by the micro control unit, and determining the threshold voltage corresponding to the current time period of the power amplifier module according to the corresponding relation table.
Optionally, after the end of the current time period, the method further comprises:
and reading the traffic volume and the control voltage corresponding to the current moment through the communication service statistics module, and updating the corresponding relation table.
Optionally, after receiving the control voltage from the control circuit through the attenuation circuit, the method further comprises:
and comparing a reference voltage with the control voltage through a comparison circuit electrically connected with the micro control unit, and outputting a state judgment voltage to the micro control unit, wherein the reference voltage is used for representing the voltage corresponding to the maximum saturated power of the power amplifier module.
Optionally, after comparing the reference voltage with the control voltage, the method further comprises:
if the control voltage is smaller than the reference voltage, the state judgment voltage is high, the micro control unit determines that the power amplification module is in a power starting control state, and the attenuation circuit is controlled to increase the maximum power of the power amplification module by a first preset value.
Optionally, after comparing the reference voltage with the control voltage, the method further comprises:
if the control voltage is greater than the reference voltage, the state judgment voltage is of a low level, the micro control unit determines that the power amplification module is not in the power starting control state, and controls the attenuation circuit to reduce the maximum power of the power amplification module by a second preset value, wherein the second preset value is smaller than the first preset value.
Optionally, after the attenuation circuit adjusts the maximum power of the power amplifier module, the method further includes:
comparing the reference voltage with the control voltage at the moment through the comparison circuit, and outputting a comparison result to the micro control unit;
And judging whether the power amplifier module is in the power starting control state or not according to the comparison result by the micro control unit.
Optionally, after the determining, by the micro control unit, whether the power amplifier module is in the power start control state according to the comparison result, the method further includes:
if the power amplifier module is in the power starting control state, determining the duration time of the power amplifier module in the power starting control state through the micro control unit;
and if the duration time is longer than the preset duration time, determining that the power amplifier module is in a busy state by the micro control unit, and generating an alarm indication.
Optionally, after the determining, by the micro control unit, whether the power amplifier module is in the power start control state according to the comparison result, the method further includes:
and if the power amplification module is not in the power control state, controlling the attenuation circuit to reduce the maximum power of the power amplification module by a third preset value through the micro control unit.
Optionally, after the transmitting the amplified radio frequency signal to the coupler, the method further comprises:
And amplifying the power of the radio frequency signal output by the coupler through at least one second power amplifying tube connected with the output end of the coupler.
Optionally, after the power amplifying the radio frequency signal output via the coupler, the method further comprises:
and receiving the radio frequency signal amplified by the power of the at least one second power amplifier tube through an isolator connected with the output end of the at least one second power amplifier tube, and transmitting the radio frequency signal to an antenna.
In a fourth aspect, an embodiment of the present invention further provides a computer apparatus, including: a processor, a memory, and a transceiver; wherein the memory stores a computer program and the processor is configured to read the program in the memory and execute the power adjustment method as described above.
In a fifth aspect, embodiments of the present invention also provide a readable storage medium having stored thereon a computer program which, when executed by a processor, implements a power adjustment method as described above.
The embodiment of the invention has the following beneficial effects:
in the technical scheme of the embodiment of the invention, an attenuation circuit, a first power amplifying tube, a coupler, a micro control unit and a control circuit are arranged in a power amplifying module, wherein the micro control unit determines the threshold voltage corresponding to the current time period of the power amplifying module according to the historical traffic corresponding to the current time period of the power amplifying module; the coupler couples out part of signals from the received radio frequency signals to the control circuit; then, the control circuit outputs the control voltage determined according to the threshold voltage and the detection voltage corresponding to the partial signal to the attenuation circuit; then, the attenuation circuit adjusts the maximum power of the power amplifier module according to the control voltage. That is, the maximum power of the power amplifier module is adjusted according to the specific situation of the historical traffic of the current time period of the power amplifier module, so that the power adjustment efficiency is higher, the accuracy is higher, and the power adjustment effect is better.
Drawings
Fig. 1 is a diagram illustrating an exemplary network structure of a mobile communication to which an embodiment of the present invention is applied;
fig. 2 is a schematic diagram of expanding coverage of a BTS using DAUs and DRUs according to an embodiment of the present invention;
fig. 3 is a block diagram of one of the DRUs to which the embodiment of the present invention is applicable;
fig. 4 is a schematic structural diagram of one of the power amplifier modules according to the embodiment of the present invention;
fig. 5 is a schematic diagram of one circuit structure of a comparison circuit 60 in a power amplifier module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of one of the power amplifier modules according to the embodiment of the present invention;
fig. 7 is a schematic diagram of one of structures of a remote snake skin unit according to an embodiment of the invention;
fig. 8 is a method flowchart of a power adjustment method of a power amplifier module according to an embodiment of the present invention;
fig. 9 is a block diagram of a computer device according to an embodiment of the present invention.
Detailed Description
The terms "first," "second," and the like in the description and in the claims and in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise," "include," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In order to better understand the above technical solutions, the following detailed description of the technical solutions of the present invention is made by using the accompanying drawings and specific embodiments, and it should be understood that the specific features of the embodiments and the embodiments of the present invention are detailed descriptions of the technical solutions of the present invention, and not limiting the technical solutions of the present invention, and the embodiments and the technical features of the embodiments of the present invention may be combined with each other without conflict.
An exemplary network structure diagram of mobile communications to which embodiments of the present invention are applicable is shown in fig. 1. Specifically, the network structure is mainly divided into two parts: the switching subsystem and the base station subsystem. Wherein the switching subsystem comprises an MSC (Mobile Switching Center ), which is the core of the entire network. The base Station subsystem includes BSC (Base Station Controller ), BTS (Base Transceiver Station, base transceiver Station, i.e., base Station), and MS (Mobile Station, very integrated transceiver, i.e., terminal). PSTN (Public Switched Telephone Network) in fig. 1 is a public switched telephone network, ISDN (Integrated Services Digital Network) is an integrated service digital network, and PDN (Public Data Network) is a public data network.
Since the coverage area of a base station BTS is limited, it is common to couple a portion of the signal out at the base station to extend the coverage area via the DAU and DRU. As shown in fig. 2, a schematic diagram of using DAUs and DRUs to extend the coverage area of a base station BTS includes DRU coverage areas in addition to the base station coverage areas. Specifically, the DAU is abbreviated as AU (digital access control unit) converts signals that the base station needs to transmit and receive into optical signals for transmission in the optical fiber. The radio frequency signal is further transmitted by DRU called RU (digital remote radio unit). Thereby expanding the coverage of the base station BTS by the RU. The transmission loop of the radio frequency signal is specifically: the base station transmits downlink signals- > DAU- > optical fiber- > DRU- > air- > terminals receive and transmit uplink signals- > air- > DRU- > optical fiber- > DAU- > base station receives uplink signals. Since RU has a lower cost than base station BTS, the communication field often adopts such a coverage transmission manner to expand the coverage of base station BTS.
One of the DRUs is shown in fig. 3 as a block diagram. Specifically, DRUs typically include a digital baseband signal processing board and a power radiating frequency amplifier board. The digital baseband signal processing board is mainly used for converting the optical signals of the optical fiber transceiver into radio frequency signals. The power radiation frequency amplifier board is mainly used for expanding radio frequency signals so as to expand coverage. Meanwhile, the power radiation frequency amplifier board has the function of receiving uplink signals. Specifically, the digital baseband signal processing board comprises an optical fiber signal conversion module, a DA processing module, a frequency conversion module, a class A amplifying tube and an AD processing module. The power radiation frequency amplifier board comprises a multi-stage power amplifier tube, an isolator, a duplexer, a switch K1 and a class A amplifier tube. In the downlink, the optical fiber signal conversion module converts an optical signal received from the optical fiber transceiver into a digital signal, then the DA processing module converts the digital signal into an electrical signal, and then the frequency conversion module converts the electrical signal into a radio frequency signal, and then the radio frequency signal is amplified through the class A amplifying tube. And then, the amplified radio frequency signal is sent to a power radiation frequency amplifier board, and the radio frequency signal is transmitted by an antenna after passing through a multistage power amplifier tube, an isolator and a duplexer. In the uplink, radio frequency signals from an antenna are sent to a digital baseband signal processing board through a duplexer, a switch K1 and a class A amplifying tube, the received radio frequency signals are converted into electric signals through a frequency conversion module, then the electric signals are converted into digital signals through an AD processing module, and then the digital signals are converted into optical signals through an optical fiber signal conversion module for transmission.
In the communication process, due to the influence of factors such as coverage area and transmission data size of the communication equipment and performance of a power amplification module (namely a power radiation frequency amplifier board), power control is required to achieve a better communication effect.
Fig. 4 is a schematic structural diagram of one of the power amplifier modules according to the embodiment of the present invention.
The power amplifier module comprises:
the attenuation circuit 10, the first power amplifier 70, the coupler 20, the micro control unit 30 and the control circuit 40; wherein,
the input end of the attenuation circuit 10 is connected with the input end of the power amplifier module;
the output end of the attenuation circuit 10 is connected with the input end of the coupler 20;
the first power amplifier 70 is electrically connected to the attenuation circuit 10 and the coupler 20, and the first power amplifier 70 is configured to amplify a radio frequency signal from the attenuation circuit 10 and send the amplified radio frequency signal to the coupler 20;
the output end of the coupler 20 is connected with the control circuit 40, and the coupler 20 is used for coupling out part of signals from the received radio frequency signals to the control circuit 40;
the micro control unit 30 is electrically connected with the control circuit 40, and the micro control unit 30 is used for determining the threshold voltage of the power amplifier module corresponding to the current time period according to the historical traffic corresponding to the current time period of the power amplifier module;
The attenuation circuit 10 is electrically connected to the control circuit 40, and the attenuation circuit 10 is configured to adjust the maximum power of the power amplifier module according to a control voltage output from the control circuit, where the control voltage is specifically determined by the control circuit 40 according to the threshold voltage and a detection voltage corresponding to the partial signal.
Wherein the smaller the control voltage, the larger the attenuation amount. That is, the smaller the control voltage, the larger the adjustment amplitude of the maximum power by the attenuation circuit 10.
In the embodiment of the present invention, by arranging the attenuation circuit 10, the first power amplifier 70, the coupler 20, the micro control unit 30 and the control circuit 40 in the power amplifier module, since the micro control unit 30 mainly determines the threshold voltage corresponding to the current time period of the power amplifier module according to the historical traffic corresponding to the current time period of the power amplifier module, and the coupler 20 couples out a part of signals from the received radio frequency signals to the control circuit 40, the control circuit 40 determines the control voltage according to the threshold voltage and the detection voltage corresponding to the part of signals, and further controls the attenuation circuit 10 to adjust the maximum power of the power amplifier module according to the control voltage. The whole adjustment process mainly adjusts the maximum power of the power amplifier module correspondingly according to the specific condition of the historical traffic of the current time period of the power amplifier module, and the traffic can change along with time, so that the power adjustment is more fit with the actual use requirement of the power amplifier module when the automatic adjustment of the power is realized, the power adjustment effect is higher, the accuracy is higher, and the power adjustment effect is better.
In an embodiment of the present invention, the power of a portion of the signal coupled from coupler 20 is detected as one of the feedback control amounts of control circuit 40. In a specific implementation process, the power detector AD8361 may detect the power value of the coupled partial signal, and amplify the voltage corresponding to the power value through the op-amp as another feedback control amount of the control circuit 40. Then, the control voltage is output to the attenuation circuit 10 through the control circuit 40, so that the adjustment of the power amplifier module is realized.
In the embodiment of the present invention, the first power amplifier 70 amplifies the rf signal from the attenuation circuit 10, and transmits the amplified rf signal to the coupler 20. In a specific implementation process, the first power amplifier 70 amplifies the radio frequency signal from the attenuation circuit 10, so as to increase the transmission distance of the radio frequency signal and improve the service performance of the power amplifier module.
In the embodiment of the invention, in order to improve the service efficiency of the power amplifier module, the service life of the power amplifier module is prolonged. The power amplifier module further comprises a communication service statistics module 50 electrically connected to the micro control unit 30, where the communication service statistics module 50 is configured to store a table of correspondence between time periods, traffic volumes and control voltages. In a specific implementation process, the 24 hours corresponding to one day may be divided according to a preset duration, for example, when the preset duration is 1 hour, the 24 hours in one day are divided into 24 time periods. For another example, 24 hours of a day are divided into 12 time periods when the preset time period is 2 hours. Of course, those skilled in the art may choose different preset durations to divide the 24 hours of a day according to actual use conditions of users, and will not be illustrated herein. After dividing the time period of day, the communication traffic statistics module 50 stores a correspondence table between the corresponding time period, traffic volume, and control voltage. In a specific implementation process, before adjusting the power of the power amplifier module, initializing and setting are performed, dividing a threshold voltage according to time periods (the threshold voltage in an initial state is a control voltage), and performing power control adjustment once with a preset time period as a period. Table 1 shows the intention for one of the correspondence relations when 24 hours in a day are divided into 24 time periods.
| Time period | Traffic volume | Control voltage |
| 0:00-1:00 | a1 | c1 |
| 1:00-2:00 | a2 | c2 |
| 2:00-3:00 | a3 | c3 |
| 3:00-4:00 | a4 | c4 |
| 4:00-5:00 | a5 | c5 |
| 5:00-6:00 | a6 | c6 |
| 6:00-7:00 | a7 | c7 |
| 7:00-8:00 | a8 | c8 |
| 8:00-9:00 | a9 | c9 |
| 9:00-10:00 | a10 | c10 |
| 10:00-11:00 | a11 | c11 |
| 11:00-12:00 | a12 | c12 |
| 12:00-13:00 | a13 | c13 |
| 13:00-14:00 | a14 | c14 |
| 14:00-15:00 | a15 | c15 |
| 15:00-16:00 | a16 | c16 |
| 16:00-17:00 | a17 | c17 |
| 17:00-18:00 | a18 | c18 |
| 18:00-19:00 | a19 | c19 |
| 19:00-20:00 | a20 | c20 |
| 20:00-21:00 | a21 | c21 |
| 21:00-22:00 | a22 | c22 |
| 22:00-23:00 | a23 | c23 |
| 23:00-24:00 | a24 | c24 |
TABLE 1
In the embodiment of the present invention, after the current time period is over, the communication service statistics module 50 is configured to read the service amount and the control voltage corresponding to the current time, and update the correspondence table. For example, the current time period is 2:00-3:00, the historical traffic corresponding to the time period is a3, and the corresponding control voltage is c3. Namely, the corresponding relation among the three before updating is (2:00-3:00, a3, c 3), wherein c3 is threshold voltage, and in the specific implementation process, the power amplifier module in the time period adjusts the maximum power based on the corresponding relation before updating. When the traffic statistics module 50 reads that the current traffic is a3', and the control voltage is c3', the corresponding relationship between the updated traffic and the updated traffic is (2:00-3:00, a3', c 3'), and the power amplification module adjusts the maximum power of the power amplification module according to the corresponding relationship between the updated traffic and the updated traffic when the power amplification module is in the time period on the next day. Therefore, the whole power adjustment process is more fit with the actual use requirement of the power amplifier module, and the use efficiency of the power amplifier module is higher.
In the embodiment of the present invention, the communication traffic statistics module 50 includes a call traffic statistics sub-module and a data transmission traffic statistics sub-module, and the statistics of the communication traffic is implemented through the communication traffic statistics module 50, and the iteration is updated.
In the embodiment of the present invention, in order to improve the power adjustment efficiency of the power amplifier module, the power amplifier module further includes a comparison circuit 60, the comparison circuit 60 is electrically connected to the micro control unit 30, and the comparison circuit 60 is configured to compare a reference voltage with a control voltage and output a status judgment voltage to the micro control unit 30, where the reference voltage is used to characterize a voltage corresponding to the power amplifier module when the power amplifier module is at the maximum saturated power. The maximum saturated power is used for representing the maximum service performance of the power amplifier module, that is, the maximum power which cannot be exceeded when the power amplifier module works normally.
In a specific implementation process, the comparison circuit 60 can enable the micro control unit 30 to determine whether the current power amplifier module is in the power-up state. The power control state is used for indicating that the output power of the power amplifier module is in a maximum control power state. The comparison circuit 60 may specifically use a comparator to compare the reference voltage with the control voltage at that time. For example, the comparator is U7B LM2903M. One of the circuit structures of the comparison circuit is shown in fig. 5. Wherein, V_ALC represents control voltage, ALC_ALARM represents state judgment voltage, MMBT3904 represents NPN triode. GND denotes a wire ground terminal, R1, R48, R49, R51, R52 denote resistors, and C73, C74 denote capacitances. The comparator input pins are 5 and 6, and the output pin is 7. In an implementation, the comparison circuit 60 compares the control voltage with the reference voltage, and the control voltage v_alc is typically very small and substantially lower than 8V (e.g., 2V-5V) when the power amplifier module is in the power-up state. And when the power amplifier module is in a power non-control state, the control voltage V_ALC is usually larger than 8V. Whether the power amplifier module is in the start-up state is determined by comparing the control voltage v_alc (5-pin voltage) value with the reference voltage (6-pin voltage) value by the comparator U7B LM2903M.
In the embodiment of the present invention, if the control voltage is smaller than the reference voltage, the state determination voltage is at a high level, and still taking the comparison circuit 60 shown in fig. 5 as an example, if the control voltage v_alc (5-pin voltage) is smaller than the reference voltage (6-pin voltage), the output pin 7 outputs a low level (0V). At this time, the transistor MMBT3904 turns off, and the state determination voltage alc_alarm is +3.3v, that is, the state determination voltage is at a high level. At this time, the micro control unit 30 is configured to determine that the power amplifier module is in a power control state, and control the attenuation circuit 10 to increase the maximum power of the power amplifier module by a first preset value. For example, the first preset value is 3db,4db, etc. Of course, the person skilled in the art may choose the corresponding first preset value according to the actual situation, and this is not an example.
In the embodiment of the invention, if the control voltage is greater than the reference voltage, the state determination voltage is at a low level. Still taking the comparison circuit 60 shown in fig. 5 as an example, if the control voltage v_alc (5 pins) is greater than the reference voltage, the output pin 7 outputs a high level (the supply voltage value is 13V). At this time, the transistor MMBT3904 is turned on, and the state determination voltage alc_alarm is OV, that is, the state determination voltage is low. At this time, the micro control unit 30 is configured to determine that the power amplifier module is not in the power-on control state, and control the attenuation circuit 10 to reduce the maximum power of the power amplifier module by a second preset value, where the second preset value is smaller than the first preset value. For example, the first preset value is 3dB, and the second preset value is 2dB. Of course, the person skilled in the art may select the corresponding first preset value and the second preset value according to the actual situation, which will not be described herein.
In the embodiment of the present invention, in order to improve the power adjustment efficiency of the power amplifier module, after the attenuation circuit 10 adjusts the maximum power of the power amplifier module, the comparison circuit 60 is configured to compare the reference voltage with the control voltage at that time, and output the comparison result to the micro control unit 30, where the micro control unit 30 is configured to determine whether the power amplifier module is in the power control state according to the comparison result.
In the implementation process, after the maximum power of the power amplifier module is adjusted by the attenuation circuit 10 each time, the detection voltage corresponding to the partial signal coupled by the coupler 20 will change, and the corresponding control voltage output through the control circuit 40 will change. The comparison circuit 60 compares the control voltage with the reference voltage and outputs the comparison result to the micro control unit 30, and the micro control unit 30 determines whether the power amplifier module is in the power control state according to the comparison result. Specifically, when the comparison result is high level, the power amplifier module is indicated to be in a power control state. And when the comparison result is low level, indicating that the power amplifier module is not in a power starting control state.
In the embodiment of the present invention, after the comparison circuit 60 compares the reference voltage with the control voltage at this time and outputs the comparison result to the micro control unit 30, if the power amplifier module is in the power start control state, the micro control unit 30 determines the duration of the power amplifier module in the power start control state, and if the duration is longer than the preset duration, the micro control unit 30 is configured to determine that the power amplifier module is in the busy state and generate the alarm indication. That is, after the maximum power of the power amplifier module is adjusted, if the power amplifier module is still in the power-up state, the duration of the power amplifier module in the power-up state is determined by the micro control unit 30. The preset duration is specifically a duration determined by a person skilled in the art according to practical situations, for example, half an hour, and of course, other durations are also possible. If the duration is longer than the preset duration, the power amplifier module is in a busy state, and at the moment, the power amplifier module is in a very fragile state, and can generate an alarm indication, report the alarm indication to a system and remind related personnel to improve vigilance.
In the embodiment of the present invention, after the comparison circuit 60 compares the reference voltage with the control voltage at this time and outputs the comparison result to the micro control unit 30, if the power amplifier module is not in the power-on control state, the micro control unit 30 is configured to control the attenuation circuit 10 to reduce the maximum power of the power amplifier module by a third preset value. That is, if the power amplifier module is not in the power control state at this time, the maximum power of the power amplifier module is continuously reduced by a third preset value. The third preset value may be the same value as the second preset value, or may be a different value, which is, of course, selected by a person skilled in the art according to actual use conditions, and will not be described herein.
In the embodiment of the present invention, if the attenuation circuit 10 reduces the maximum power of the power amplifier module by the third preset value, it is still necessary to continuously determine whether the power amplifier module is in the power-up control state by the micro control unit 30, and adjust the maximum power accordingly.
In the embodiment of the present invention, in order to improve the service performance of the power amplification module, the power amplification module further includes a first power amplifier 70 electrically connected to the attenuation circuit 10 and the coupler 20, respectively, and the first power amplifier 70 amplifies the radio frequency signal from the attenuation circuit 10 and sends the amplified radio frequency signal to the coupler 20. In a specific implementation process, the first power amplifier 70 amplifies the radio frequency signal from the attenuation circuit 10, so as to increase the transmission distance of the radio frequency signal and improve the service performance of the power amplifier module.
In the embodiment of the present invention, in order to improve the service performance of the power amplification module, the power amplification module further includes an isolator 90 connected to the output end of the at least one second power amplifier 80, where the isolator 90 is configured to receive the radio frequency signal amplified by the at least one second power amplifier 80 and send the radio frequency signal to the antenna. In the specific implementation process, the interference of the irrelevant signals to the radio frequency signals is effectively avoided through the isolator 90, the service performance of the power amplifier module is improved, and the adjustment efficiency of the power amplifier module is improved.
Fig. 6 is a schematic structural diagram of one of the power amplifier modules according to the embodiment of the present invention, and because each device included in the schematic structural diagram is described in detail in the foregoing, a detailed description is omitted herein.
In the embodiment of the present invention, after the radio frequency signal passes through the isolator 90, the radio frequency signal output by the isolator 90 is sent to a duplexer of the communication system and further sent to an antenna, thereby realizing unidirectional transmission of the radio frequency signal.
Based on the same inventive concept, please refer to fig. 7, an embodiment of the present invention further provides a remote radio unit, including: the base band module 100 (i.e. a digital base band signal processing board), the antenna 110 and the power amplifier module 120 as described above disposed between the base band module 100 and the antenna 110, wherein the base band module 110 is configured to generate a radio frequency signal, and the power amplifier module 120 is configured to power-adjust the radio frequency signal from the base band module 110 and transmit the adjusted radio frequency signal to the antenna.
Based on the same inventive concept, as shown in fig. 8, the embodiment of the invention further provides a power adjustment method, which is applied to the power amplification module described above, wherein the power amplification module comprises an attenuation circuit, a first power amplification tube, a coupler, a micro control unit and a control circuit, and the method comprises the following steps:
s101: amplifying the radio frequency signal from the attenuation circuit through the first power amplifying tube, and sending the amplified radio frequency signal to the coupler;
s102: coupling out a portion of the signal from the received video signal to the control circuit via the coupler;
s103: determining, by the micro control unit, a threshold voltage corresponding to the power amplifier module in a current time period, where the threshold voltage is specifically determined by the micro control unit according to a historical traffic volume in the current time period;
s104: receiving, by the control circuit, the threshold voltage and a detection voltage corresponding to the partial signal;
s105: and receiving the control voltage from the control circuit through the attenuation circuit, and adjusting the maximum power of the power amplifier module.
In the embodiment of the present invention, for step S102 and step S103, specifically, step S102 may be executed first, and then step S103 may be executed; step S103 may be executed first, and step S102 may be executed later. It is also possible to perform step S102 and step S103 simultaneously. Of course, those skilled in the art can control the execution sequence of step S102 and step S103 according to actual needs, and will not be described herein.
In the embodiment of the present invention, the specific implementation process of step S101 to step S105 has been described in detail in the foregoing, and will not be described in detail herein.
In the embodiment of the present invention, the determining, by the micro control unit, that the power amplifier module corresponds to the threshold voltage in the current time period includes: storing a corresponding relation table comprising time periods, traffic and control voltages through a communication service statistics module electrically connected with the micro control unit;
and reading the corresponding relation table by the micro control unit, and determining the threshold voltage corresponding to the current time period of the power amplifier module according to the corresponding relation table.
In an embodiment of the present invention, after the end of the current period, the method further includes:
and reading the traffic volume and the control voltage corresponding to the current moment through the communication service statistics module, and updating the corresponding relation table.
In an embodiment of the present invention, after receiving the control voltage from the control circuit through the attenuation circuit, the method further includes:
and comparing a reference voltage with the control voltage through a comparison circuit electrically connected with the micro control unit, and outputting a state judgment voltage to the micro control unit, wherein the reference voltage is used for representing the voltage corresponding to the maximum saturated power of the power amplifier module.
In an embodiment of the present invention, after comparing the reference voltage with the control voltage, the method further includes:
if the control voltage is smaller than the reference voltage, the state judgment voltage is high, the micro control unit determines that the power amplification module is in a power starting control state, and the attenuation circuit is controlled to increase the maximum power of the power amplification module by a first preset value.
In an embodiment of the present invention, after comparing the reference voltage with the control voltage, the method further includes:
if the control voltage is greater than the reference voltage, the state judgment voltage is of a low level, the micro control unit determines that the power amplification module is not in the power starting control state, and controls the attenuation circuit to reduce the maximum power of the power amplification module by a second preset value, wherein the second preset value is smaller than the first preset value.
In an embodiment of the present invention, after the attenuation circuit adjusts the maximum power of the power amplifier module, the method further includes:
comparing the reference voltage with the control voltage at the moment through the comparison circuit, and outputting a comparison result to the micro control unit;
And judging whether the power amplifier module is in the power starting control state or not according to the comparison result by the micro control unit.
In the embodiment of the present invention, after the determining, by the micro control unit, whether the power amplifier module is in the power start control state according to the comparison result, the method further includes:
if the power amplifier module is in the power starting control state, determining the duration time of the power amplifier module in the power starting control state through the micro control unit;
and if the duration time is longer than the preset duration time, determining that the power amplifier module is in a busy state by the micro control unit, and generating an alarm indication.
In the embodiment of the present invention, after the determining, by the micro control unit, whether the power amplifier module is in the power start control state according to the comparison result, the method further includes:
and if the power amplification module is not in the power control state, controlling the attenuation circuit to reduce the maximum power of the power amplification module by a third preset value through the micro control unit.
In an embodiment of the present invention, after the amplified radio frequency signal is sent to the coupler, the method further includes:
And amplifying the power of the radio frequency signal output by the coupler through at least one second power amplifying tube connected with the output end of the coupler.
In an embodiment of the present invention, after the power amplifying the radio frequency signal output through the coupler, the method further includes:
and receiving the radio frequency signal amplified by the power of the at least one second power amplifier tube through an isolator connected with the output end of the at least one second power amplifier tube, and transmitting the radio frequency signal to an antenna.
Based on the same technical concept, please refer to fig. 9, which is a schematic structural diagram of a computer device according to an embodiment of the present invention, the computer device includes: processor 130, memory 140, transceiver 150, and bus interface.
The processor 130 is responsible for managing the bus architecture and general processing, and the memory 140 may store data used by the processor 130 in performing operations. The transceiver 150 is used to receive and transmit data under the control of the processor 130.
The bus architecture may comprise any number of interconnecting buses and bridges, and in particular one or more processors represented by the processor 130 and various circuits of the memory, represented by the memory 140, are linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The processor 130 is responsible for managing the bus architecture and general processing, and the memory 140 may store data used by the processor 130 in performing operations.
The flow disclosed in the embodiment of the present invention may be applied to the processor 130 or implemented by the processor 130. In implementation, the steps of the signal processing flow may be performed by integrated logic circuits of hardware in the processor 130 or instructions in the form of software. The processor 130 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and may implement or perform the methods, steps and logic blocks disclosed in embodiments of the invention. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the route updating method disclosed in connection with the embodiment of the invention can be directly embodied as a hardware processor or a combination of hardware and software modules in the processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 140, and the processor 130 reads the information in the memory 140 and completes the steps of the signal processing flow in combination with its hardware.
Specifically, the processor 130 is configured to read the program in the memory 140, and execute any step of the power adjustment method of the power amplifier module.
Based on the same technical idea, the embodiments of the present application also provide a readable storage medium having a computer program stored thereon. The computer program, when executed by the processor, implements any of the steps described above for the power adjustment method of the power amplifier module.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (21)
1. A power amplifier module, comprising:
the device comprises an attenuation circuit, a first power amplifying tube, a coupler, a micro control unit and a control circuit; wherein,
the input end of the attenuation circuit is connected with the input end of the power amplifier module;
the output end of the attenuation circuit is connected with the input end of the coupler;
the first power amplifying tube is respectively and electrically connected with the attenuation circuit and the coupler, and is used for amplifying the radio frequency signal from the attenuation circuit and transmitting the amplified radio frequency signal to the coupler;
the output end of the coupler is connected with the control circuit, and the coupler is used for coupling out part of signals from the received radio frequency signals to the control circuit;
the micro control unit is electrically connected with the control circuit and is used for determining the threshold voltage corresponding to the current time period of the power amplifier module according to the historical traffic corresponding to the current time period of the power amplifier module;
the attenuation circuit is electrically connected with the control circuit and is used for adjusting the maximum power of the power amplification module according to the control voltage output by the control circuit, wherein the control voltage is specifically determined by the control circuit according to the threshold voltage and the detection voltage corresponding to the partial signal;
The power amplifier module further comprises a communication service statistics module; the micro control unit is electrically connected with the communication service statistics module, and after the current time period is ended, the communication service statistics module is used for reading the service volume and the control voltage corresponding to the current time and updating a corresponding relation table comprising the time period, the service volume and the control voltage.
2. The power amplifier module of claim 1, wherein the communication traffic statistics module is further configured to store the correspondence table including time periods, traffic volumes, and control voltages.
3. The power amplifier module of claim 1, further comprising a comparison circuit electrically connected to the micro control unit, the comparison circuit configured to compare a reference voltage with the control voltage and output a status determination voltage to the micro control unit, wherein the reference voltage is used to characterize a voltage corresponding to the power amplifier module at a maximum saturated power.
4. The power amplifier module of claim 3, wherein if the control voltage is less than the reference voltage, the state determination voltage is at a high level, and the micro control unit is configured to determine that the power amplifier module is in a power-up state and control the attenuation circuit to increase the maximum power of the power amplifier module by a first preset value.
5. The power amplifier module of claim 4, wherein if the control voltage is greater than the reference voltage, the state determination voltage is at a low level, and the micro control unit is configured to determine that the power amplifier module is not in the power-up state and control the attenuation circuit to reduce the maximum power of the power amplifier module by a second preset value, where the second preset value is less than the first preset value.
6. The power amplifier module of claim 4 or 5, wherein after the attenuation circuit adjusts the maximum power of the power amplifier module, the comparison circuit is configured to compare the reference voltage with the control voltage at the time, and output a comparison result to the micro control unit, and the micro control unit is configured to determine whether the power amplifier module is in the power control state according to the comparison result.
7. The power amplifier module of claim 6, wherein the micro control unit determines a duration of the power amplifier module in the power-up state if the power amplifier module is in the power-up state, and wherein the micro control unit is configured to determine that the power amplifier module is in a busy state if the duration is greater than a preset duration, and generate an alarm indication.
8. The power amplifier module of claim 6, wherein the micro-control unit is configured to control the attenuation circuit to reduce the maximum power of the power amplifier module by a third preset value if the power amplifier module is not in the power-up control state.
9. The power amplifier module of claim 1, further comprising at least one second power amplifier tube connected to the coupler output for power amplifying the radio frequency signal output via the coupler.
10. The power amplifier module of claim 9, further comprising an isolator connected to the output of the at least one second power amplifier, the isolator configured to receive the radio frequency signal amplified by the at least one second power amplifier and transmit the radio frequency signal to an antenna.
11. A remote radio unit comprising: a baseband module, an antenna and a power amplifier module according to any one of claims 1-10 arranged between the baseband module and the antenna, wherein the baseband module is used for generating radio frequency signals, and the power amplifier module is used for performing power adjustment on the radio frequency signals from the baseband module and transmitting the adjusted radio frequency signals to the antenna.
12. The power adjustment method is applied to a power amplification module, and the power amplification module comprises an attenuation circuit, a first power amplification tube, a coupler, a micro control unit and a control circuit, and is characterized by comprising the following steps:
amplifying the radio frequency signal from the attenuation circuit through the first power amplifying tube, and sending the amplified radio frequency signal to the coupler;
coupling out a portion of the signal from the received video signal to the control circuit via the coupler;
determining, by the micro control unit, a threshold voltage corresponding to the power amplifier module in a current time period, where the threshold voltage is specifically determined by the micro control unit according to a historical traffic volume in the current time period;
receiving, by the control circuit, the threshold voltage and a detection voltage corresponding to the partial signal;
receiving control voltage from the control circuit through the attenuation circuit, and adjusting the maximum power of the power amplifier module;
the power amplifier module further comprises a communication service statistics module;
the method further comprises the steps of: and after the current time period is finished, reading the traffic volume and the control voltage corresponding to the current moment through a communication traffic statistics module electrically connected with the micro control unit, and updating a corresponding relation table comprising the time period, the traffic volume and the control voltage.
13. The method of claim 12, wherein the determining, by the micro-control unit, that the power amplifier module corresponds to a threshold voltage for a current time period comprises:
storing the corresponding relation table comprising the time period, the traffic volume and the control voltage through the communication traffic statistics module;
and reading the corresponding relation table by the micro control unit, and determining the threshold voltage corresponding to the current time period of the power amplifier module according to the corresponding relation table.
14. The method of claim 12, wherein after receiving a control voltage from the control circuit through the attenuation circuit, the method further comprises:
and comparing a reference voltage with the control voltage through a comparison circuit electrically connected with the micro control unit, and outputting a state judgment voltage to the micro control unit, wherein the reference voltage is used for representing the voltage corresponding to the maximum saturated power of the power amplifier module.
15. The method of claim 14, wherein after comparing a reference voltage to the control voltage, the method further comprises:
if the control voltage is smaller than the reference voltage, the state judgment voltage is high, the micro control unit determines that the power amplification module is in a power starting control state, and the attenuation circuit is controlled to increase the maximum power of the power amplification module by a first preset value.
16. The method of claim 15, wherein after comparing a reference voltage to the control voltage, the method further comprises:
if the control voltage is greater than the reference voltage, the state judgment voltage is of a low level, the micro control unit determines that the power amplification module is not in the power starting control state, and controls the attenuation circuit to reduce the maximum power of the power amplification module by a second preset value, wherein the second preset value is smaller than the first preset value.
17. The method of claim 15 or 16, wherein after the attenuation circuit adjusts the maximum power of the power amplifier module, the method further comprises:
comparing the reference voltage with the control voltage at the moment through the comparison circuit, and outputting a comparison result to the micro control unit;
and judging whether the power amplifier module is in the power starting control state or not according to the comparison result by the micro control unit.
18. The method of claim 17, wherein after the determining, by the micro control unit, whether the power amplifier module is in the power-on-control state based on the comparison result, the method further comprises:
If the power amplifier module is in the power starting control state, determining the duration time of the power amplifier module in the power starting control state through the micro control unit;
and if the duration time is longer than the preset duration time, determining that the power amplifier module is in a busy state by the micro control unit, and generating an alarm indication.
19. The method of claim 17, wherein after the determining, by the micro control unit, whether the power amplifier module is in the power-on-control state based on the comparison result, the method further comprises:
and if the power amplification module is not in the power control state, controlling the attenuation circuit to reduce the maximum power of the power amplification module by a third preset value through the micro control unit.
20. The method of claim 12, wherein after the transmitting the amplified radio frequency signal to the coupler, the method further comprises:
and amplifying the power of the radio frequency signal output by the coupler through at least one second power amplifying tube connected with the output end of the coupler.
21. The method of claim 20, wherein after the power amplifying the radio frequency signal output via the coupler, the method further comprises:
And receiving the radio frequency signal amplified by the power of the at least one second power amplifier tube through an isolator connected with the output end of the at least one second power amplifier tube, and transmitting the radio frequency signal to an antenna.
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