CN104009950A - Method and apparatus for protecting power amplifier in digital predistortion power amplifier system - Google Patents
Method and apparatus for protecting power amplifier in digital predistortion power amplifier system Download PDFInfo
- Publication number
- CN104009950A CN104009950A CN201310055366.4A CN201310055366A CN104009950A CN 104009950 A CN104009950 A CN 104009950A CN 201310055366 A CN201310055366 A CN 201310055366A CN 104009950 A CN104009950 A CN 104009950A
- Authority
- CN
- China
- Prior art keywords
- power amplifier
- switch
- signal
- input
- path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Embodiments of the present invention relate to the technical field of mobile communication, and especially relate to a method and apparatus for protecting a power amplifier in a digital predistortion power amplifier system. The method and apparatus are used for protecting the power amplifier in the digital predistortion power amplifier system when the digital predistortion power amplifier is in an initial power-up state. according to the embodiments of the invention, the method for protecting the power amplifier in the digital predistortion power amplifier system including: before initialization configuration is performed on devices in the digital predistortion power amplifier system, switching off a path of to-be-amplified signals input to a power amplifier through a first switch; and after the completion of the initialization configuration performed on the devices in the digital predistortion power amplifier system, switching on the path of the to-be-amplified signals input to the power amplifier through the first switch. According to the embodiments of the invention, the power amplifier in the digital predistortion power amplifier system is protected when the digital predistortion power amplifier system is in the initial power-up state.
Description
Technical field
The present invention relates to mobile communication technology field, particularly in a kind of digital pre-distortion power amplifying system, protect the method and apparatus of power amplifier.
Background technology
Power amplifier has important effect in mobile communication system, is mainly used in the forward signal of input to carry out from antenna, exporting after power amplification.When damaging appears in power amplifier, mobile communication system will not have signal output, and the subscriber equipment in mobile communication system covers service area cannot carry out proper communication.Thereby in the current mobile communication system that comprises power amplifier, all adopt method and apparatus to protect power amplifier.
In comprising the digital pre-distortion power amplifying system of power amplifier, the method and apparatus that power amplifier is protected has multiple, and the current method and apparatus that power amplifier is protected is all protections that the power amplifier in running order digital pre-distortion power amplifying system is carried out, such as, power output based on to power amplifier detects, when occurring that overpower just closes power amplifier, thereby realize the method and apparatus that power amplifier is protected; Based on baseband signal average power is detected, when occurring that baseband signal average power surpasses threshold value and just turn-offs baseband signal, thus the method and apparatus that realization is protected power amplifier etc.For the digital pre-distortion power amplifying system in initial power-up state; each device comprising due to digital pre-distortion power amplifying system can produce larger spuious when initial configuration; and power amplifier has entered operating state; thereby at digital pre-distortion power amplifying system during in initial power-up state; power amplifier is likely damaged, and also there is no at present a kind of method digital pre-distortion power amplifying system is protected the power amplifier in digital pre-distortion power amplifying system during in initial power-up state.
In sum, also there is no at present a kind of method of power amplifier in digital pre-distortion power amplifying system being protected during in initial power-up state at digital pre-distortion power amplifying system.
Summary of the invention
The embodiment of the present invention provides the method and apparatus of protecting power amplifier in a kind of digital pre-distortion power amplifying system, in order to the power amplifier in digital pre-distortion power amplifying system is protected during in initial power-up state at digital pre-distortion power amplifying system.
The method of protecting power amplifier in a kind of digital pre-distortion power amplifying system that the embodiment of the present invention provides, comprising:
Before each device in digital pre-distortion power amplifying system carries out initial configuration, by the first switch, turn-off the path for the treatment of amplifying signal that is input to power amplifier;
Each device in determining digital pre-distortion power amplifying system completes after initial configuration, is communicated with the path for the treatment of amplifying signal that is input to power amplifier by the first switch.
In a kind of digital pre-distortion power amplifying system that the embodiment of the present invention provides, protect the device of power amplifier, comprise the first controller, second controller and the first switch;
The first controller, before carrying out initial configuration, turn-offs the path for the treatment of amplifying signal that is input to power amplifier for each device at digital pre-distortion power amplifying system by the first switch;
Second controller, completes after initial configuration for each device determining digital pre-distortion power amplifying system, is communicated with the path for the treatment of amplifying signal that is input to power amplifier by the first switch.
In the digital pre-distortion power amplifying system that the embodiment of the present invention provides, protect the method for power amplifier to comprise: before each device in digital pre-distortion power amplifying system carries out initial configuration, by the first switch, to turn-off the path for the treatment of amplifying signal that is input to power amplifier, each device in determining digital pre-distortion power amplifying system completes after initial configuration, by the first switch, be communicated with the path for the treatment of amplifying signal that is input to power amplifier, due to before each device in digital pre-distortion power amplifying system carries out initial configuration, be input to the path for the treatment of amplifying signal of power amplifier in off-state, each device in digital pre-distortion power amplifying system completes after initial configuration, be communicated with the path for the treatment of amplifying signal that is input to power amplifier, thereby each device of comprising of digital pre-distortion power amplifying system when initial configuration, produce spuiously can not be input in power amplifier, thereby realized at digital pre-distortion power amplifying system, the power amplifier in digital pre-distortion power amplifying system is protected during in initial power-up state, further increased the reliability of the power amplifier in digital pre-distortion power amplifying system.
Accompanying drawing explanation
Fig. 1 protects the schematic flow sheet of the method for power amplifier in embodiment of the present invention digital pre-distortion power amplifying system;
Fig. 2 detailed method schematic flow sheet that to be embodiment of the present invention the first protect the power amplifier in digital pre-distortion power amplifying system during in initial power-up state at digital pre-distortion power amplifying system;
Fig. 3 is the detailed method schematic flow sheet that embodiment of the present invention the first is protected the power amplifier in digital pre-distortion power amplifying system when digital pre-distortion power amplifying system is in running order;
Fig. 4 is the structural representation of embodiment of the present invention the first digital pre-distortion power amplifying system;
Fig. 5 detailed method schematic flow sheet that to be embodiment of the present invention the second protect the power amplifier in digital pre-distortion power amplifying system during in initial power-up state at digital pre-distortion power amplifying system;
Fig. 6 is the detailed method schematic flow sheet that embodiment of the present invention the second is protected the power amplifier in digital pre-distortion power amplifying system when digital pre-distortion power amplifying system is in running order;
Fig. 7 is the structural representation of embodiment of the present invention the second digital pre-distortion power amplifying system;
Fig. 8 be in embodiment of the present invention digital pre-distortion power amplifying system, protect power amplifier apparatus structure schematic diagram.
Embodiment
In the embodiment of the present invention, in digital pre-distortion power amplifying system, protect the method for power amplifier to comprise: before each device in digital pre-distortion power amplifying system carries out initial configuration, by the first switch, to turn-off the path for the treatment of amplifying signal that is input to power amplifier, each device in determining digital pre-distortion power amplifying system completes after initial configuration, by the first switch, be communicated with the path for the treatment of amplifying signal that is input to power amplifier, due to before each device in digital pre-distortion power amplifying system carries out initial configuration, be input to the path for the treatment of amplifying signal of power amplifier in off-state, each device in digital pre-distortion power amplifying system completes after initial configuration, be communicated with the path for the treatment of amplifying signal that is input to power amplifier, thereby each device of comprising of digital pre-distortion power amplifying system when initial configuration, produce spuiously can not be input in power amplifier, thereby realized at digital pre-distortion power amplifying system, the power amplifier in digital pre-distortion power amplifying system is protected during in initial power-up state, further increased the reliability of the power amplifier in digital pre-distortion power amplifying system.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
According to the difference that switch number is set in digital pre-distortion power amplifying system, in the digital pre-distortion power amplifying system providing in the embodiment of the present invention, protect the method for power amplifier also different, will be introduced respectively below.
In the first digital pre-distortion power amplifying system, protect the method for power amplifier, wherein in digital pre-distortion power amplifying system, be provided with a switch (the first switch).
As shown in Figure 1, in embodiment of the present invention digital pre-distortion power amplifying system, protect the method for power amplifier to comprise the following steps:
Before step 101, each device in digital pre-distortion power amplifying system carry out initial configuration, by the first switch, turn-off the path for the treatment of amplifying signal that is input to power amplifier;
Step 102, each device in determining digital pre-distortion power amplifying system complete after initial configuration, are communicated with the path for the treatment of amplifying signal that is input to power amplifier by the first switch.
In concrete enforcement, the subject of implementation of the embodiment of the present invention can be the device that is arranged in a brand-new protection power amplifier of digital pre-distortion power amplifying system, can be also digital pre-distortion power amplifying system.
Preferably, the first switch is analog switch, the fast response time of the first switch, in step 101, when controlling disconnection the first switch, can realize the path for the treatment of amplifying signal that quick shutoff is input to power amplifier, in step 102, when controlling closed the first switch, can realize the path for the treatment of amplifying signal that quick connection is input to power amplifier.
In concrete enforcement, it is that high level enables to disconnect that the first switch can be set, low level enables closed; It is that low level enables to disconnect that the first switch also can be set, and high level enables closed, specifically can be as required.Preferably, it is that high level enables to disconnect that the first switch is set, low level enables closed.
In enforcement, it is that high level enables to disconnect that the first switch is set, and low level enables closed, can reduce the closed probability of mistake, improves the reliability of the first switch and the stability of digital pre-distortion power amplifying system.
Preferably, after being input to the path for the treatment of amplifying signal of power amplifier in step 101, by the first switch shutoff, before being input to the path for the treatment of amplifying signal of power amplifier in step 102, by the first switch connection, also comprise:
Judge whether each device in digital pre-distortion power amplifying system completes initial configuration;
If the determination result is NO, further judge whether the time that device in digital pre-distortion power amplifying system carries out initial configuration be greater than setting-up time length, if be greater than, determine initial configuration failure, carry out alarming processing; If be not more than, returned to each device judging in digital pre-distortion power amplifying system and whether complete initial configuration;
If the determination result is YES, perform step 102, determine that each device in digital pre-distortion power amplifying system completes initial configuration.
In concrete enforcement, setting-up time length can arrange as required, such as, 5 minutes.
In enforcement, the method by embodiment of the present invention Fig. 1 can realize to be protected the power amplifier in the digital pre-distortion power amplifying system in initial power-up state, has further increased the reliability of the power amplifier in digital pre-distortion power amplifying system.
In concrete enforcement, in step 102, after being input to the path for the treatment of amplifying signal of power amplifier by the first switch connection, digital pre-distortion power amplifying system enters operating state.
Preferably, in step 102, after being input to the path for the treatment of amplifying signal of power amplifier by the first switch connection, also comprise:
Determine that the primary signal of input digital pre-distortion power amplifying system is in First Characteristic reference value corresponding to signal obtaining after the first down-conversion and analog to digital converter processing, and determine until amplifying signal in Second Characteristic reference value corresponding to signal obtaining after power amplifier and the second down-conversion and analog to digital converter processing;
After the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, by the first switch, turn-off the path for the treatment of amplifying signal that is input to power amplifier.
In concrete enforcement, feature reference value is one or more in peak power value, average power content and range value, and preferably, feature reference value is peak power value.
Preferably, the method for determining specific threshold scope has multiple, such as, rule of thumb to determine, the amplifying power for the treatment of amplifying signal according to power amplifier is determined etc. specifically can select as required to adopt which kind of method.
In concrete enforcement, for feature reference value, it is the multiple situation in peak power value, average power content and range value, at least two kinds of corresponding ratios that can be in multiple within the scope of specific threshold after, by the first switch, turn-off the path for the treatment of amplifying signal that is input to power amplifier; Each corresponding ratio that can be in multiple within the scope of specific threshold after, by the first switch, turn-off the path for the treatment of amplifying signal that is input to power amplifier.
Preferably, for feature reference value, it is the multiple situation in peak power value, average power content and range value, the ratio of a kind of correspondence that can be in multiple within the scope of specific threshold after, just by the first switch, turn-off the path for the treatment of amplifying signal that is input to power amplifier, wherein, specific threshold scope when feature reference value is peak power value, specific threshold scope when feature reference value is average power content, and the specific threshold scope of feature reference value while being range value can be identical, also can be different.
Such as, suppose that feature reference value is peak power value and average power content, when feature reference value is peak power value, specific threshold scope is (a, b), definite First Characteristic reference value and the ratio of Second Characteristic reference value are E; When feature reference value is average power content, specific threshold scope is (c, d), and definite First Characteristic reference value and the ratio of Second Characteristic reference value are F; A<E<b, F>d;
Due to when feature reference value is peak power value, the ratio of First Characteristic reference value and Second Characteristic reference value, within the scope of specific threshold, thereby need to turn-off the path for the treatment of amplifying signal be input to power amplifier by the first switch;
Wherein, a can equal c, and b can equal d.
Preferably, after the ratio of determining First Characteristic reference value and Second Characteristic reference value is not within the scope of specific threshold, by the first switch, be communicated with the path for the treatment of amplifying signal (that is the state that, keeps the first switch closure) that is input to power amplifier.
In enforcement, by said method, can realize the power amplifier in running order digital pre-distortion power amplifying system is protected, further increase the reliability of the power amplifier in digital pre-distortion power amplifying system.
Preferably, after being input to the path for the treatment of amplifying signal of power amplifier by the first switch connection, before determining First Characteristic reference value and Second Characteristic reference value, also comprise:
The yield value of baseband gain device is configured to the first yield value;
After the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, also comprise:
The yield value of baseband gain device is configured to the second yield value;
Wherein, the second yield value is less than the first yield value.
In concrete enforcement, first and second yield value can be set as required.
Preferably, the first yield value is 0.8 or 1.2 or 1.6.
Preferably, the second yield value is 0.
In enforcement, after being input to the path for the treatment of amplifying signal of power amplifier by the first switch connection, before determining First Characteristic reference value and Second Characteristic reference value, the yield value of baseband gain device is configured to the first yield value (normal value), can guarantees that each device in digital pre-distortion power amplifying system is normally worked.
In enforcement, after the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, by the yield value of baseband gain device be configured to the second yield value (such as, be set to 0), can realize protection power amplifier.
In order to realize the method for protecting power amplifier in more detailed description the first digital pre-distortion power amplifying system of the present invention, several preferably execution modes will be enumerated respectively below.
Embodiment mono-:
As shown in Figure 2, the detailed method that embodiment of the present invention the first is protected the power amplifier in digital pre-distortion power amplifying system during in initial power-up state at digital pre-distortion power amplifying system, comprising:
Step 201, by the first switch, turn-off the path for the treatment of amplifying signal be input to power amplifier;
As shown in Figure 4, treat that amplifying signal is from digital-to-analogue conversion and upconverter output, and input power amplifier, an analog switch (the first switch) can be set between digital-to-analogue conversion and upconverter and power amplifier, when disconnecting the first switch, realized by the first switch and turn-offed the path for the treatment of amplifying signal that is input to power amplifier.
Each device in step 202, digital pre-distortion power amplifying system carries out initial configuration;
As shown in Figure 4, digital pre-distortion power amplifying system is when initial power-up state, each device in digital pre-distortion power amplifying system all can carry out initial configuration, wherein, the time of power amplifier initial configuration is very short, when digital pre-distortion power amplifying system just powers on, power amplifier just completes initial configuration, enters operating state.
Step 203, judge whether each device in digital pre-distortion power amplifying system completes initial configuration; If so, perform step 204, otherwise execution step 205;
Step 204, by the first switch, be communicated with the path for the treatment of amplifying signal be input to power amplifier, the yield value of baseband gain device is configured to 0.8;
Step 205, judge whether the time that device in digital pre-distortion power amplifying system carries out initial configuration be greater than 5 minutes, if so, perform step 206, otherwise execution step 203;
Step 206, determine initial configuration failure, carry out alarming processing.
In concrete enforcement, in step 206, determine initial configuration failure, carry out, after alarming processing, also comprising:
Digital pre-distortion power amplifying system re-powers processing.
Embodiment bis-:
As shown in Figure 3, the detailed method that embodiment of the present invention the first is protected the power amplifier in digital pre-distortion power amplifying system when digital pre-distortion power amplifying system is in running order, comprising:
Step 301, by the first switch, be communicated with the path for the treatment of amplifying signal be input to power amplifier, the yield value of baseband gain device is configured to 0.8;
Preferably, be communicated with the path for the treatment of amplifying signal that is input to power amplifier by the first switch, after the yield value of baseband gain device is configured to 0.8, digital pre-distortion power amplifying system is in normal operating conditions.
Step 302, determine input digital pre-distortion power amplifying system primary signal in the first peak power value corresponding to signal obtaining after the first down-conversion and analog to digital converter are processed, and determine until amplifying signal in the second peak power value corresponding to signal obtaining after power amplifier and the second down-conversion and analog to digital converter are processed;
Step 303, determine the first peak power value and the second peak power value ratio whether within the scope of specific threshold, if so, perform step 304, otherwise execution step 302;
Step 304, by the first switch, turn-off the path for the treatment of amplifying signal be input to power amplifier, the yield value of baseband gain device is configured to 0.
As shown in Figure 4, the adaptive controller in digital pre-distortion power amplifying system is determined first and second peak power value in real time, and according to first and second peak power value of determining, controls the first switch and baseband gain device.
It should be noted that, the embodiment of the present invention one and example two can separately be implemented, also can implement altogether, and when embodiment mono-and example two are implemented altogether, after execution of step 204, execution step 302.
In the second digital pre-distortion power amplifying system, protect the method for power amplifier, wherein in digital pre-distortion power amplifying system, be provided with two switches (the first switch and second switch).
Preferably, in step 101, each device in digital pre-distortion power amplifying system carries out also comprising before initial configuration:
By second switch, turn-off the path of the primary signal that is input to digital pre-distortion power amplifying system;
In step 102, after being input to the path for the treatment of amplifying signal of power amplifier by the first switch connection, also comprise:
The path that is communicated with the primary signal that is input to digital pre-distortion power amplifying system by second switch.
Preferably, second switch is analog switch, the fast response time of second switch, when controlling disconnection second switch, can realize the path that quick shutoff is input to the primary signal of digital pre-distortion power amplifying system, when controlling closed second switch, can realize the path that quick connection is input to the primary signal of digital pre-distortion power amplifying system.
In concrete enforcement, it is that high level enables to disconnect that second switch can be set, low level enables closed; It is that low level enables to disconnect that second switch also can be set, and high level enables closed, specifically can be as required.Preferably, it is that high level enables to disconnect that second switch is set, low level enables closed.
In enforcement, it is that high level enables to disconnect that second switch is set, and low level enables closed, can reduce the closed probability of mistake, improves the reliability of second switch and the stability of digital pre-distortion power amplifying system.
Preferably, after being input to the path for the treatment of amplifying signal of power amplifier and turn-offing the path of the primary signal that is input to digital pre-distortion power amplifying system by second switch by the first switch shutoff, before being input to the path for the treatment of amplifying signal of power amplifier by the first switch connection, also comprise:
Judge whether each device in digital pre-distortion power amplifying system completes initial configuration;
If the determination result is NO, further judge whether the time that device in digital pre-distortion power amplifying system carries out initial configuration be greater than setting-up time length, if be greater than, determine initial configuration failure, carry out alarming processing; If be not more than, returned to each device judging in digital pre-distortion power amplifying system and whether complete initial configuration;
If the determination result is YES, carry out the step that each device of determining in digital pre-distortion power amplifying system completes initial configuration.
In concrete enforcement, setting-up time length can arrange as required, such as, 5 minutes.
In enforcement; by said method, not only can realize the power amplifier in the digital pre-distortion power amplifying system in initial power-up state is protected; further increased the reliability of the power amplifier in digital pre-distortion power amplifying system; can also reduce the probability of digital pre-distortion system alarm, improve the operational efficiency of digital pre-distortion system.
In concrete enforcement, be communicated with the path of the primary signal that is input to digital pre-distortion power amplifying system by second switch after, primary signal input digital pre-distortion power amplifying system, digital pre-distortion power amplifying system enters operating state.
Preferably, by the first switch, be communicated with and be input to the path for the treatment of amplifying signal of power amplifier, and be communicated with the path of the primary signal that is input to digital pre-distortion power amplifying system by second switch after, also comprise:
Determine that primary signal is in the corresponding First Characteristic reference value of the signal obtaining after the first down-conversion and analog to digital converter processing, and determine until amplifying signal in Second Characteristic reference value corresponding to signal obtaining after power amplifier and the second down-conversion and analog to digital converter processing;
After the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, by second switch, turn-off the path of the primary signal that is input to digital pre-distortion power amplifying system, and turn-off by the first switch the path for the treatment of amplifying signal that is input to power amplifier.
In concrete enforcement, feature reference value is one or more in peak power value, average power content and range value, and preferably, feature reference value is peak power value.
Preferably, the method for determining specific threshold scope has multiple, such as, rule of thumb to determine, the amplifying power for the treatment of amplifying signal according to power amplifier is determined etc. specifically can select as required to adopt which kind of method.
In concrete enforcement; in the second digital pre-distortion power amplifying system, protect in the method for power amplifier; for feature reference value, be to protect in the method for power amplifier in the execution mode of the multiple situation in peak power value, average power content and range value and embodiment of the present invention the first digital pre-distortion power amplifying system, feature reference value is that the multiple execution mode in peak power value, average power content and range value is similar.
After the ratio of determining First Characteristic reference value and Second Characteristic reference value is not within the scope of specific threshold, keep the state of first and second switch closure.
In enforcement, by said method, can realize the power amplifier in running order digital pre-distortion power amplifying system is protected, further increase the reliability of the power amplifier in digital pre-distortion power amplifying system.
Preferably, after being input to the path for the treatment of amplifying signal of power amplifier by the first switch connection, be communicated with the path of the primary signal that is input to digital pre-distortion power amplifying system by second switch before, also comprise:
The yield value of baseband gain device is configured to the first yield value;
After the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, also comprise:
The yield value of baseband gain device is configured to the second yield value;
Wherein, the second yield value is less than the first yield value.
In concrete enforcement; in the second digital pre-distortion power amplifying system, protect in the method for power amplifier, in the execution mode of first and second yield value and embodiment of the present invention the first digital pre-distortion power amplifying system, protect the execution mode of the execution mode of first and second yield value in the method for power amplifier similar.
In enforcement, the yield value of baseband gain device is configured to the first yield value (normal value), can guarantees that each device in digital pre-distortion power amplifying system is normally worked.
In enforcement, by the yield value of baseband gain device be configured to the second yield value (such as, be set to 0), can realize protection power amplifier.
In order to realize the method for protecting power amplifier in more detailed description the second digital pre-distortion power amplifying system of the present invention, several preferably execution modes will be enumerated respectively below.
Embodiment tri-:
As shown in Figure 5, the detailed method that embodiment of the present invention the second is protected the power amplifier in digital pre-distortion power amplifying system during in initial power-up state at digital pre-distortion power amplifying system, comprising:
Step 501, by the first switch, turn-off the path for the treatment of amplifying signal be input to power amplifier;
Step 502, by second switch, turn-off the path of the primary signal that is input to digital pre-distortion power amplifying system;
Wherein, can perform step 501 and step 502 simultaneously, can first perform step 501, then perform step 502, also can first perform step 502, then perform step 501.
As shown in Figure 7, treat that amplifying signal is from digital-to-analogue conversion and upconverter output, and input power amplifier, an analog switch (the first switch) can be set between digital-to-analogue conversion and upconverter and power amplifier; Primary signal is from the input port output of digital pre-distortion power amplifying system, and be input to the first down-conversion and analog to digital converter, can between the input port of digital pre-distortion power amplifying system and the first down-conversion and analog to digital converter, an analog switch (second switch) be set.
Each device in step 503, digital pre-distortion power amplifying system carries out initial configuration;
Step 504, judge whether each device in digital pre-distortion power amplifying system completes initial configuration; If so, perform step 505, otherwise execution step 506;
Step 505, by the first switch, be communicated with the path for the treatment of amplifying signal be input to power amplifier, the yield value of baseband gain device is configured to 0.8, by second switch, be communicated with the path of the primary signal that is input to digital pre-distortion power amplifying system;
Step 506, judge whether the time that device in digital pre-distortion power amplifying system carries out initial configuration be greater than 5 minutes, if so, perform step 507, otherwise execution step 504;
Step 507, determine initial configuration failure, carry out alarming processing.
Embodiment tetra-:
As shown in Figure 6, the detailed method that embodiment of the present invention the second is protected the power amplifier in digital pre-distortion power amplifying system when digital pre-distortion power amplifying system is in running order, comprising:
Step 601, by the first switch, be communicated with the path for the treatment of amplifying signal be input to power amplifier, the yield value of baseband gain device is configured to 0.8, by second switch, be communicated with the path of the primary signal that is input to digital pre-distortion power amplifying system;
Preferably, be communicated with the path for the treatment of amplifying signal that is input to power amplifier by the first switch, after the yield value of baseband gain device is configured to 0.8, digital pre-distortion power amplifying system is in normal operating conditions.
Step 602, determine input digital pre-distortion power amplifying system primary signal at the first average power content corresponding to signal obtaining after the first down-conversion and analog to digital converter are processed, and determine until amplifying signal at the second average power content corresponding to signal obtaining after power amplifier and the second down-conversion and analog to digital converter are processed;
Step 603, determine the first average power content and the second average power content ratio whether within the scope of specific threshold, if so, perform step 604, otherwise execution step 602;
Step 604, by second switch, turn-off the path of the primary signal that is input to digital pre-distortion power amplifying system, the yield value of baseband gain device is configured to 0, by the first switch, turn-off the path for the treatment of amplifying signal that is input to power amplifier.
As shown in Figure 7, the adaptive controller in digital pre-distortion power amplifying system is determined first and second average power content in real time, and according to first and second average power content of determining, controls the first switch, second switch and baseband gain device.
It should be noted that, the embodiment of the present invention three and example four can separately be implemented, also can implement altogether, and when embodiment tri-and example four are implemented altogether, after execution of step 505, execution step 602.
It should be noted that, the primary signal in the embodiment of the present invention is radiofrequency signal.
Preferably, radiofrequency signal can be the radiofrequency signal of ownership formula.
Fig. 7 will take below as example, the operation principle of digital pre-distortion power amplifying system is introduced, the execution mode of Fig. 4 and the execution mode of Fig. 7 are similar.
As shown in Figure 7, adaptive controller is configured to 1.2 by the yield value of baseband gain device, and controls first and second switch in closure state;
Radiofrequency signal (that is, primary signal) is input to the first down-conversion and analog to digital converter through second switch;
The first down-conversion and analog to digital converter, for radiofrequency signal being changed into the first digital baseband signal, be input to baseband gain device by a part of the first digital baseband signal, and another part the first digital baseband signal be input to adaptive controller;
Wherein, second switch can be special-purpose radio-frequency switching device, and the first down-conversion and analog to digital converter can comprise special-purpose frequency mixer, phase-locked loop device and analog to digital converter.
Baseband gain device, for the first digital baseband signal of input is being gained after amplification, the first digital baseband signal after part gain is amplified is input to digital pre-distortion, and the first digital baseband signal after another part gain is amplified is input to adaptive controller;
Digital pre-distortion, for the first digital baseband signal amplifying through gain is carried out to predistortion, is input to digital-to-analogue conversion and upconverter by the first digital baseband signal after predistortion;
Wherein, digital pre-distortion can adopt special chip or FPGA(field programmable gate array) realize.
Digital-to-analogue conversion and upconverter, for changing the first digital baseband signal after predistortion into radiofrequency signal after predistortion;
Wherein, digital-to-analogue conversion and upconverter can comprise special-purpose digital to analog converter, frequency mixer and phase-locked loop device.
Radiofrequency signal after predistortion is input to power amplifier through the first switch;
Wherein, the first switch can be special-purpose radio-frequency switching device, and power amplifier can be by LDMOS(lateral double diffusion metal oxide semiconductor) device or GaN(gallium nitride) element manufacturing forms.
Power amplifier, for carrying out power amplification by the radiofrequency signal after predistortion;
Radiofrequency signal after power amplification is after coupler, from the output output of digital pre-distortion power amplifying system;
Wherein, coupler can adopt microstrip line to realize.
The second down-conversion and analog to digital converter, for using the radiofrequency signal after a part of power amplification from coupler as feedback signal, be converted to the second digital baseband signal by this feedback signal, and the second digital baseband signal be input to adaptive controller;
Wherein, the execution mode of the execution mode of the second down-conversion and analog to digital converter and the first down-conversion and analog to digital converter is similar.
Adaptive controller, for determining corresponding First Characteristic reference value and Second Characteristic reference value corresponding to the second digital baseband signal of the first digital baseband signal, and according to definite First Characteristic reference value and Second Characteristic reference value, control the first switch, second switch and baseband gain device; And according to the first digital baseband signal after the second digital baseband signal and gain amplification, control figure predistortion.
Based on same inventive concept; the device of protecting power amplifier in digital pre-distortion power amplifying system is also provided in the embodiment of the present invention; because the principle that this device is dealt with problems is similar to the method for the embodiment of the present invention, so the enforcement of this device can, referring to the enforcement of method, repeat part and repeat no more.
Fig. 8 protects the structural representation of the device of power amplifier in embodiment of the present invention digital pre-distortion power amplifying system, as shown in the figure, in the digital pre-distortion power amplifying system of the embodiment of the present invention, protect the device of power amplifier to comprise the first controller 801, second controller 802 and the first switch 803;
The first controller 801, before carrying out initial configuration, turn-offs by the first switch 803 path for the treatment of amplifying signal that is input to power amplifier for each device at digital pre-distortion power amplifying system;
Second controller 802, completes after initial configuration for each device determining digital pre-distortion power amplifying system, by the first switch 803, is communicated with the path for the treatment of amplifying signal that is input to power amplifier.
Preferably, the first controller 801 is power supply, by apply high level on the first switch 803, realizes and disconnects the first switch 803.
Preferably, second controller 802 is equivalent to the adaptive controller in Fig. 4 and Fig. 7.
Preferably, second controller 802 also for:
Determine that the primary signal of input digital pre-distortion power amplifying system is in First Characteristic reference value corresponding to signal obtaining after the first down-conversion and analog to digital converter processing, and determine until amplifying signal in Second Characteristic reference value corresponding to signal obtaining after power amplifier and the second down-conversion and analog to digital converter processing; And after the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, by the first switch 803, turn-off the path for the treatment of amplifying signal that is input to power amplifier.
Preferably, second controller 802 also for:
After being input to the path for the treatment of amplifying signal of power amplifier by the first switch 803 connections, before determining First Characteristic reference value and Second Characteristic reference value, the yield value of baseband gain device 805 is configured to the first yield value; And after the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, the yield value of baseband gain device 805 is configured to the second yield value; Wherein, the second yield value is less than the first yield value.
Preferably, in embodiment of the present invention digital pre-distortion power amplifying system, protect the device of power amplifier also to comprise second switch 804;
The first controller 801, before also carrying out initial configuration for each device at digital pre-distortion power amplifying system, turn-offs the path of the primary signal that is input to digital pre-distortion power amplifying system by second switch 804;
Second controller 802, also, for after being input to the path for the treatment of amplifying signal of power amplifier by the first switch 803 connections, is communicated with the path of the primary signal that is input to digital pre-distortion power amplifying system by second switch 804.
Preferably, the first controller 801 is power supply, by apply high level on second switch 804, realizes and disconnects second switch 804.
Preferably, second controller 802 is equivalent to the adaptive controller in Fig. 4 and Fig. 7.
Preferably, second controller 802 also for:
Determine that primary signal is in the corresponding First Characteristic reference value of the signal obtaining after the first down-conversion and analog to digital converter processing, and determine until amplifying signal in Second Characteristic reference value corresponding to signal obtaining after power amplifier and the second down-conversion and analog to digital converter processing; And after the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, by second switch 804, turn-off the path of the primary signal that is input to digital pre-distortion power amplifying system, by the first switch 803, turn-off the path for the treatment of amplifying signal that is input to power amplifier.
Preferably, second controller 802 also for:
After being input to the path for the treatment of amplifying signal of power amplifier by the first switch 803 connections, before being communicated with the path of the primary signal that is input to digital pre-distortion power amplifying system by second switch 804, the yield value of baseband gain device 805 is configured to the first yield value; And after the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, the yield value of baseband gain device 805 is configured to the second yield value; Wherein, the second yield value is less than the first yield value.
Preferably, the first switch 803 and second switch 804 are analog switch device.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (14)
1. in digital pre-distortion power amplifying system, protect a method for power amplifier, it is characterized in that, the method comprises:
Before each device in digital pre-distortion power amplifying system carries out initial configuration, by the first switch, turn-off the path for the treatment of amplifying signal that is input to power amplifier;
Each device in determining digital pre-distortion power amplifying system completes after initial configuration, is communicated with the path for the treatment of amplifying signal that is input to power amplifier by the first switch.
2. the method for claim 1, is characterized in that, after being input to the path for the treatment of amplifying signal of power amplifier, also comprises by the first switch connection:
Determine that the primary signal of input digital pre-distortion power amplifying system is in First Characteristic reference value corresponding to signal obtaining after the first down-conversion and analog to digital converter processing, and determine until amplifying signal in Second Characteristic reference value corresponding to signal obtaining after power amplifier and the second down-conversion and analog to digital converter processing;
After the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, by the first switch, turn-off the path for the treatment of amplifying signal that is input to power amplifier.
3. method as claimed in claim 2, is characterized in that, after being input to the path for the treatment of amplifying signal of power amplifier, before determining First Characteristic reference value and Second Characteristic reference value, also comprises by the first switch connection:
The yield value of baseband gain device is configured to the first yield value;
After the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, also comprise:
The yield value of baseband gain device is configured to the second yield value;
Wherein, the second yield value is less than the first yield value.
4. the method for claim 1, is characterized in that, each device in digital pre-distortion power amplifying system carries out also comprising before initial configuration:
By second switch, turn-off the path of the primary signal that is input to digital pre-distortion power amplifying system;
After being input to the path for the treatment of amplifying signal of power amplifier by the first switch connection, also comprise:
The path that is communicated with the primary signal that is input to digital pre-distortion power amplifying system by second switch.
5. method as claimed in claim 4, is characterized in that, after being communicated with the path of the primary signal that is input to digital pre-distortion power amplifying system, also comprises by second switch:
Determine that primary signal is in the corresponding First Characteristic reference value of the signal obtaining after the first down-conversion and analog to digital converter processing, and determine until amplifying signal in Second Characteristic reference value corresponding to signal obtaining after power amplifier and the second down-conversion and analog to digital converter processing;
After the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, by second switch, turn-off the path of the primary signal that is input to digital pre-distortion power amplifying system, and turn-off by the first switch the path for the treatment of amplifying signal that is input to power amplifier.
6. method as claimed in claim 5, is characterized in that, after being input to the path for the treatment of amplifying signal of power amplifier, before being communicated with the path of the primary signal that is input to digital pre-distortion power amplifying system, also comprises by second switch by the first switch connection:
The yield value of baseband gain device is configured to the first yield value;
After the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, also comprise:
The yield value of baseband gain device is configured to the second yield value;
Wherein, the second yield value is less than the first yield value.
7. as the method for claim 2,4 ~ 6 as described in arbitrary, it is characterized in that, described primary signal is radiofrequency signal.
8. in digital pre-distortion power amplifying system, protect a device for power amplifier, it is characterized in that, comprise the first controller, second controller and the first switch;
The first controller, before carrying out initial configuration, turn-offs the path for the treatment of amplifying signal that is input to power amplifier for each device at digital pre-distortion power amplifying system by the first switch;
Second controller, completes after initial configuration for each device determining digital pre-distortion power amplifying system, is communicated with the path for the treatment of amplifying signal that is input to power amplifier by the first switch.
9. device as claimed in claim 8, is characterized in that, second controller also for:
Determine that the primary signal of input digital pre-distortion power amplifying system is in First Characteristic reference value corresponding to signal obtaining after the first down-conversion and analog to digital converter processing, and determine until amplifying signal in Second Characteristic reference value corresponding to signal obtaining after power amplifier and the second down-conversion and analog to digital converter processing; And after the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, by the first switch, turn-off the path for the treatment of amplifying signal that is input to power amplifier.
10. device as claimed in claim 9, is characterized in that, described second controller also for:
After being input to the path for the treatment of amplifying signal of power amplifier by the first switch connection, before determining First Characteristic reference value and Second Characteristic reference value, the yield value of baseband gain device is configured to the first yield value; And after the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, the yield value of baseband gain device is configured to the second yield value; Wherein, the second yield value is less than the first yield value.
11. devices as claimed in claim 8, is characterized in that, also comprise second switch;
The first controller, before also carrying out initial configuration for each device at digital pre-distortion power amplifying system, turn-offs the path of the primary signal that is input to digital pre-distortion power amplifying system by second switch;
Second controller, also, for after being input to the path for the treatment of amplifying signal of power amplifier by the first switch connection, is communicated with the path of the primary signal that is input to digital pre-distortion power amplifying system by second switch.
12. devices as claimed in claim 11, is characterized in that, described second controller also for:
Determine that primary signal is in the corresponding First Characteristic reference value of the signal obtaining after the first down-conversion and analog to digital converter processing, and determine until amplifying signal in Second Characteristic reference value corresponding to signal obtaining after power amplifier and the second down-conversion and analog to digital converter processing; And after the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, by second switch, turn-off the path of the primary signal that is input to digital pre-distortion power amplifying system, by the first switch, turn-off the path for the treatment of amplifying signal that is input to power amplifier.
13. devices as claimed in claim 12, is characterized in that, described second controller also for:
After being input to the path for the treatment of amplifying signal of power amplifier by the first switch connection, be communicated with the path of the primary signal that is input to digital pre-distortion power amplifying system by second switch before, the yield value of baseband gain device is configured to the first yield value; And after the ratio of determining First Characteristic reference value and Second Characteristic reference value is within the scope of specific threshold, the yield value of baseband gain device is configured to the second yield value; Wherein, the second yield value is less than the first yield value.
14. devices as described in as arbitrary in claim 11 ~ 13, is characterized in that, described the first switch and second switch are analog switch device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310055366.4A CN104009950A (en) | 2013-02-21 | 2013-02-21 | Method and apparatus for protecting power amplifier in digital predistortion power amplifier system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310055366.4A CN104009950A (en) | 2013-02-21 | 2013-02-21 | Method and apparatus for protecting power amplifier in digital predistortion power amplifier system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104009950A true CN104009950A (en) | 2014-08-27 |
Family
ID=51370444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310055366.4A Pending CN104009950A (en) | 2013-02-21 | 2013-02-21 | Method and apparatus for protecting power amplifier in digital predistortion power amplifier system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104009950A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429916A (en) * | 2015-06-28 | 2016-03-23 | 知鑫知识产权服务（上海）有限公司 | Adaptive digital predistortion method of multiplex receiving link |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6756850B2 (en) * | 2001-06-29 | 2004-06-29 | Renesas Technology Corp. | High frequency power amplifier circuit |
| CN101174816A (en) * | 2006-11-01 | 2008-05-07 | 中兴通讯股份有限公司 | Digital predistortion linearized processing equipment and power detecting method thereof |
| CN101789923A (en) * | 2009-12-30 | 2010-07-28 | 京信通信系统（中国）有限公司 | Digital pre-distortion power amplifying system and method thereof for processing signals |
| CN102255505A (en) * | 2011-07-29 | 2011-11-23 | 索尔思光电（成都）有限公司 | APD (avalanche photo diode) voltage control circuit and method |
| CN102271425A (en) * | 2011-06-22 | 2011-12-07 | 中兴通讯股份有限公司 | Method and device for protecting power amplifier |
-
2013
- 2013-02-21 CN CN201310055366.4A patent/CN104009950A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6756850B2 (en) * | 2001-06-29 | 2004-06-29 | Renesas Technology Corp. | High frequency power amplifier circuit |
| CN101174816A (en) * | 2006-11-01 | 2008-05-07 | 中兴通讯股份有限公司 | Digital predistortion linearized processing equipment and power detecting method thereof |
| CN101789923A (en) * | 2009-12-30 | 2010-07-28 | 京信通信系统（中国）有限公司 | Digital pre-distortion power amplifying system and method thereof for processing signals |
| CN102271425A (en) * | 2011-06-22 | 2011-12-07 | 中兴通讯股份有限公司 | Method and device for protecting power amplifier |
| CN102255505A (en) * | 2011-07-29 | 2011-11-23 | 索尔思光电（成都）有限公司 | APD (avalanche photo diode) voltage control circuit and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429916A (en) * | 2015-06-28 | 2016-03-23 | 知鑫知识产权服务（上海）有限公司 | Adaptive digital predistortion method of multiplex receiving link |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20110175681A1 (en) | Radio frequency power amplifier and wireless communication device including the same | |
| KR100845698B1 (en) | Amplifier unit and method of detecting failure in the same | |
| CN102142817B (en) | Input power overload protecting circuit and system and input power overload protection method | |
| US9698731B2 (en) | Power amplifier, transceiver, and base station | |
| US11005423B2 (en) | Bias circuit and power amplification circuit | |
| EP2541759A1 (en) | Doherty power amplifier and implementation method therefor | |
| CN108574462B (en) | Protection circuit and circuit protection method | |
| KR100450934B1 (en) | A high efficiency stage-switching cdma power amplifier | |
| US9768770B2 (en) | Bias circuit for a high power radio frequency switching device | |
| CN105530001A (en) | Apparatus and methods for controlling overshoot in digital step attenuators | |
| JP2010056876A (en) | Duplexer circuit | |
| CN108092677B (en) | Transmitting assembly | |
| CN201303322Y (en) | Power amplifier protective device for ultra high frequency (UHF) transmitter | |
| US20140232472A1 (en) | Method and Device for Protecting a High-Frequency Power Amplifier Against a Termination fault | |
| CN104009950A (en) | Method and apparatus for protecting power amplifier in digital predistortion power amplifier system | |
| CN104270103A (en) | Pre-distortion power amplification radio frequency link, radio frequency power amplifier and fault handling method thereof | |
| CN104333332A (en) | Method and device of controlling Doherty power amplifier | |
| JP2008118428A (en) | Radio base station device | |
| WO2008050440A1 (en) | Power amplifier | |
| CN116015320A (en) | Radio frequency transmitting device and implementation method thereof | |
| CN107733379B (en) | Radio frequency amplifier output end mismatch detection circuit and detection method thereof | |
| US9002312B1 (en) | Dynamic biasing for an active circuit | |
| US20150200702A1 (en) | Passive feedback path for pre-distortion in power amplifiers | |
| CN204836094U (en) | Power amplification circuit and radio frequency circuit | |
| CN106159896A (en) | A kind of method and device exporting overpower protection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140827 |
|
| RJ01 | Rejection of invention patent application after publication |