CN100459767C - Method and device for preventing overdriven of power amplifier - Google Patents
Method and device for preventing overdriven of power amplifier Download PDFInfo
- Publication number
- CN100459767C CN100459767C CNB200510073001XA CN200510073001A CN100459767C CN 100459767 C CN100459767 C CN 100459767C CN B200510073001X A CNB200510073001X A CN B200510073001XA CN 200510073001 A CN200510073001 A CN 200510073001A CN 100459767 C CN100459767 C CN 100459767C
- Authority
- CN
- China
- Prior art keywords
- power
- signal
- module
- power amplifier
- statistics
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000005070 sampling Methods 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 6
- 230000000052 comparative effect Effects 0.000 claims description 6
- 230000001052 transient effect Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 description 7
- 238000001914 filtration Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005111 flow chemistry technique Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000010267 cellular communication Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Landscapes
- Transmitters (AREA)
- Amplifiers (AREA)
Abstract
This invention relates to a method for preventing power amplifiers from generating over-excitation including: setting time and parameter for calculating power of signal to carry out power statistic to signal based on the time and parameter, adjusting the signal power to the output power sphere allowed by the power amplifier, which can guarantee that over-excitation alarm will not happen to the power amplifier to close it when the power of input signal is over-excitated to increase the stability and reliability of WCDMA.
Description
Technical field
The present invention relates to the signal processing system in the modern communications field, relate in particular to a kind of method and apparatus that prevents overdriven of power amplifier.
Background technology
GSM (global system for mobile communications) is as second generation digital mobile cellular communication system, in worldwide, obtained using widely, because frequency resource nervous and to the demand of more new business, the development of 3G (3-G (Generation Three mobile communication system)) is an inexorable trend.As 3G three big standard techniques one of WCDMA (Wideband Code Division Multiple Access (WCDMA)), be most widely used in the present 3G standard.
Mobile communication system connects travelling carriage and base station by wireless mode, and its mobile network's coverage is relevant with the transmitting power of base station, and transmitting and receiving of spacing wireless signal all relies on portable antenna to realize.
In the WCDMA wireless communication system, the processing and the wireless transmission of up-downgoing data and signaling is responsible in the base station, and its basic principle structure chart comprises as shown in Figure 1 as the lower part:
Baseband processing unit: the chnnel coding, spread spectrum, modulation, transmit diversity, power control, More Soft Handoff, the numeral that are used for responsible down link from the base station to the travelling carriage are closed functions such as road, DA (digital-to-analogue) conversion; And function such as Multipath searching of the up link from the travelling carriage to the base station, More Soft Handoff, RAKE merging, demodulation, despreading, channel-decoding.
The structural representation of baseband processing unit comprises as shown in Figure 2 as the lower part:
Baseband modulation: be used for each code channel is carried out band spectrum modulation;
Numeral is closed the road: be used for the information through all code channels of the signal of baseband modulation is lumped together;
Filter: be used for and carry out outside digital forming and the filtering band spuious through the digital signal that closes the road;
Digital Up Convert: being used for the output signal of filter is transformed into intermediate-freuqncy signal through Digital Up Convert, is an optional processing unit, if do not need intermediate frequency process, the output signal of filter will directly be delivered to DAC;
DAC: be used for converting digital signal to analog signal.Delivering to transceiver then sends.
Transceiver: the functions such as classification reception, LNA, Filtering Processing, down-conversion that are used for being responsible for up-conversion, Filtering Processing and the up link from the travelling carriage to the base station of the down link from the base station to the travelling carriage.
Power amplifier: be used for transmitting power is carried out processing and amplifying.
In the WCDMA base station system, power amplifier is the equipment of a key, and its transmitting power is big more, and the base station just can cover bigger radius, just can allow more user to insert.Therefore, the efficient of raising power amplifier is very important in the WCDMA base station system.The major technique that improves the efficient of power amplifier at present is the slicing technology, utilizes the slicing technology can reduce PAR (peak-to-average ratio), reduces the rollback requirement of power amplifier, thereby improves emission effciency.
The WCDMA base station is a complex processing systems, in order to increase the reliability of equipment, its power amplifier itself has too drastic detection, too drastic alarm, the too drastic functions such as power amplifier of cutting out, promptly power amplifier will cut out automatically when input power is excessive, do not burnt out with the guaranteed output amplifier, the alarm detection time of power amplifier arrives in the hundreds of millisecond scope tens, if power amplifier cuts out continually automatically, can cause the maintainable very poor of system.
Duplexer: be used for being responsible for the isolation of receiving and transmitting signal, guarantee that transceiver channel can the shared same antenna, support transmit-receive diversity.
Antenna and feeder line: be used for signal is transmitted in the air, receive airborne mobile station signal simultaneously,, adopt double antenna to receive in order to realize receive diversity.
Travelling carriage: can be the mobile phone that people are familiar with, also can be other vehicle mobile terminals.
In the WCDMA system,, adopted a lot of advanced persons' technology, comprised base band high order modulation technology, transmit diversity, smart antenna, multicarrier transceiver or the like in order to improve the base station system performance.The employing of these new technologies has improved the peak-to-average ratio that transmits, and also power amplifier is had higher requirement.
In the WCDMA system, the generation of each new calling all can increase power system capacity, can increase all and have the interference level of calling, influence system communication quality, therefore, RNC in the WCDMA system (radio network controller) has CAC (Admission Control) function, and promptly RNC can control the user by rights and whether be linked into network.Simultaneously, the base station in the WCDMA system has quick jam control function, also can prevent system overload.This two-stage volume control function can guarantee that the WCDMA system can be too not congested.
In existing WCDMA system, when system is in the volume test process or system when being in big capacity operating state,, can cause base station transmitting power not steady owing to exist continuous user to insert request, power super large phenomenon in short-term can appear.At this moment, even CAC in the system and quick congestion feature are all opened, can not avoid power amplifier too drastic alarm phenomenon to occur, main cause is because the response time of the quick jam control function in base station arrives hundreds of millisecond magnitude tens, and the alarm detection time of power amplifier is also in this scope, therefore, this moment, power amplifier was easy to take place too drastic alarm, and switch-off power amplifier and transmitting power.This phenomenon will inevitably reduce the stability and the reliability of system, causes the maintainable very poor of system.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of method and apparatus that prevents overdriven of power amplifier, thereby guarantee under the over excited situation of input signal power, power amplifier too drastic alarm can not occur and cut out power amplifier, has strengthened the stable and maintainable of system.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method that prevents overdriven of power amplifier comprises:
A, the instantaneous power timing statistics and the parameter of signal being carried out power statistic are set;
B, according to the time and the parameter of described instantaneous power statistics, the signal transient power of statistical signal in instantaneous power timing statistics section is more than or equal to the sampling point number of the instantaneous power statistics threshold value of setting, the proportional numbers of this sampling point number and setting is compared, according to comparative result, signal power is adjusted in the output power range of power amplifier permission.
Described signal comprises:
Baseband signal in the wireless communication system.
Described instantaneous power statistics threshold value is greater than a setting power number of the specified maximal input of radio frequency sending set.
Described instantaneous power timing statistics is: greater than 1 chip chip less than a time period in 1024 chip chip times.
Described according to comparative result, signal power is adjusted in the output power range of power amplifier permission, specifically comprise:
If described sampling point number accounts for the ratio of statistics sum greater than the proportional numbers of handling the setting of starting to control threshold value as overdrive protection, then the signal power in the next timing statistics section is changed to zero or the output power range that allows of power amplifier in power number.
Described method also comprises:
The average power timing statistics and the parameter of signal being carried out power statistic are set.
Described average power timing statistics is: more than or equal to 1024 chip chip, be less than or equal to a time period in 2048 chip chip times.
Described method also comprises:
Described method also comprises:
According to described average power timing statistics, the average power of statistical signal in described average power timing statistics section;
Setting is that power amplifier automatic electric-level control and treatment is started to control threshold value greater than a setting power numerical value of the specified peak power output of radio frequency sending set;
If described average power is started to control threshold value greater than power amplifier automatic electric-level control and treatment, then the signal power in the next average power timing statistics section is adjusted in the output power range of power amplifier permission, with the signal output after handling, output signal is carried out described steps A and B again.
Described setting power numerical value adds setting numerical value greater than the specified peak power output of radio frequency sending set at least, this setting numerical value greater than 1db, be less than or equal to the signal maximum power and deduct the specified maximal input of radio frequency sending set.
A kind of device that prevents overdriven of power amplifier comprises:
Power statistic module: be used for signal being carried out the instantaneous power timing statistics and the parameter of power statistic according to what be provided with, the signal transient power of statistical signal in instantaneous power timing statistics section sends this sampling point number to power control module more than or equal to the sampling point number of the instantaneous power statistics threshold value of setting;
Power control module: be used for the sampling point number that described power statistic module is transmitted and the proportional numbers of setting and compare, produce the control command that power is adjusted, and the control command that produces is sent to power regulation module according to comparative result;
Power regulation module: be used for the control command that sends according to power control module, described signal is carried out the power adjustment, signal power is adjusted in the output power range that power amplifier allows, and the signal that will handle is exported.
Described power statistic module comprises:
Instantaneous power statistical module: be used for the sampling point number of the signal transient power of statistical signal in instantaneous power timing statistics section, and send the sampling point number that counts to power control module more than or equal to instantaneous power statistics threshold value;
Described power control module; the sampling point number that described instantaneous power statistical module is sent and the proportional numbers of setting compare; if described sampling point number accounts for the ratio of statistics sum greater than the proportional numbers of handling the setting of starting to control threshold value as overdrive protection, then transmit control command to described power regulation module
Described power regulation module comprises:
The overdrive protection module: be used for the control command that sends according to described power control module, with the signal power in the next timing statistics section be changed to zero or the output power range that allows of power amplifier in power number, and the signal after will handling is exported.
Described power statistic module also comprises:
The average power statistical module: be used for before described instantaneous power statistical module carries out described number of samples purpose statistics, the average power of statistical signal in average power timing statistics section, and send the average power that counts to power control module;
Described power control module, be used for before described instantaneous power statistical module carries out described number of samples purpose statistics, the average power that described average power statistical module is sent and the power amplifier automatic electric-level control and treatment of setting are started to control threshold value and are compared, if described average power is started to control threshold value greater than described power amplifier automatic electric-level control and treatment, then transmit control command to described power regulation module;
Described power regulation module comprises:
Power amplifier automatic electric-level control module: be used for before described instantaneous power statistical module carries out described number of samples purpose statistics, the control command that sends according to power control module, signal power in the next average power timing statistics section is adjusted in the output power range of power amplifier permission, and the signal after will handling is exported to the instantaneous power statistical module.
As seen from the above technical solution provided by the invention; the present invention compares with prior art; numeral in the baseband processing unit of WCDMA base station is closed has increased control of power amplifier level and overdrive protection module between road and the filter; thereby guarantee under the over excited situation of input signal power; power amplifier too drastic alarm can not occur and cut out power amplifier; increased the blasting control ability of power amplifier; strengthened the stability and the reliability of WCDMA base station system, and made the WCDMA base station system be easy to safeguard.
Description of drawings
Fig. 1 is the basic principle structure chart of base station in the WCDMA system;
Fig. 2 is the structural representation of the baseband processing unit of base station system in the WCDMA system;
Fig. 3 is the structural representation of enhancement function baseband processing unit of the present invention;
Fig. 4 is power control time and the required precision schematic diagram of power regulation module when input signal is excessive;
Fig. 5 is a kind of concrete process chart of the method for the invention;
Fig. 6 is the another kind of concrete process chart of the method for the invention;
Fig. 7 is the implementation structure figure of device of the present invention;
Fig. 8 is the another kind of implementation structure figure of device of the present invention;
Fig. 9 is the another kind of implementation structure figure of device of the present invention.
Embodiment
The invention provides a kind of method and apparatus that prevents overdriven of power amplifier.Core of the present invention is: closing in numeral has increased control of power amplifier level and overdrive protection module between road and the filter; if the signal power of current slot is bigger, then be reduced in the output power range of power amplifier permission by power amplifier level control and overdrive protection module signal power with next time period.
The numeral of the method for the invention baseband processing unit of base station system in the WCDMA system is closed has increased control of power amplifier level and overdrive protection module between road and the filter.
Control of described power amplifier level and overdrive protection module are made up of power statistic module, power control module, power regulation module three parts, the structural representation of enhancement function baseband processing unit of the present invention as shown in Figure 3, wherein:
The power statistic module: statistics close the signal power of road output, and statistics is delivered to power control module;
Power control module: produce the control command that power is adjusted according to certain algorithm, and control signal is delivered to power regulation module;
Power regulation module:, carry out the power adjustment according to the control command of receiving.
Comprise ALC module, overdrive protection module and base band data selection output module in the power regulation module, the ALC module can realize ALC (control of power amplifier automatic electric-level) processing capacity and signal is exported to base band data selection output module input signal; The overdrive protection module can realize the overdrive protection processing capacity and signal is exported to base band data selection output module that base band data selects output module can select signal to export to the filter of back level as required to input signal.
The ALC principle is: earlier input signal is averaged power statistic by the power statistic module, (average power in 1024chip＜Ta＜2048chip), statistics is defined as Pa at time period Ta promptly to add up input signal.
If during Pa＞Pout_rating (the specified peak power output in radio frequency sending set unit)+XdB, wherein: 1dB≤X≤signal maximum power-Pin_rating (the specified maximal input of radio frequency sending set), then reduce the signal power of next Ta time according to a certain percentage, and with power output Ta be stabilized in the time Pout_rating+/-YdB (power amplifier can not take place in the scope of too drastic alarm) scope in.
The overdrive protection principle is: earlier input signal is carried out the instantaneous power statistics by the power statistic module; promptly the instantaneous power of each chip of input signal is calculated by the power statistic module; the statistics input signal is at Td (1＜Td＜Ta; particular system is made as 256Chip) the sampling point number N of instantaneous power 〉=Pin_rating+MdB in the time; (described M need be provided with according to the requirement of system, can be made as 6 in particular system).If N compares greater than certain ratio m%, promptly with the statistics sum in the Td time
(m is according to the actual conditions setting, 0＜m＜100, particular system is made as 20) then is changed to the signal of next Td in the time zero or be changed to other power amplifier data in the too drastic alarm scope can not take place.
Power control time and the required precision of power regulation module of the present invention when input signal is excessive is as follows: when input signal after the average power of T1 (1024chip) in the time surpassed Pin_rating+XdB, power output must Ta be reduced in the time Pout_rating+/-YdB (power amplifier can not take place in the scope of too drastic alarm) scope in, then, power output must return to normal level in the time at Ta, and the reverse overshoot during Ta must not surpass ZdB (Z≤2.5dB).
Power regulation module when input signal is excessive the power control time and the required precision schematic diagram as shown in Figure 4,1024chip≤Ta=Tb≤2048chip wherein, Delta1=+/-1dB, Delta2 refers to meet the precision (the power averaging time is 10mS) of this normal demanded power output.
The structural representation of the device that prevents overdriven of power amplifier provided by the present invention comprises as shown in Figure 7 as the lower part:
Power statistic module: be used for the base band data that receives is carried out power statistic, and send statistics to power control module.
The power statistic module comprises average power statistical module and instantaneous power statistical module.The average power of average power statistical module counts input base band data in time period Ta, the instantaneous power statistical module calculates the instantaneous power of input base band data at each chip, and the statistics input signal is in the sampling point number N of the instantaneous power 〉=Pin_rating+MdB of Td in the time.
Power control module: be used for producing the control command that power is adjusted, and the control command that produces is sent to power regulation module according to certain algorithm.Described certain algorithm comprises ALC control algolithm and overdrive protection algorithm, and the control command that power control module produces comprises ALC control command and overdrive protection control command.
Power regulation module: be used for the control command that sends according to power control module, the input base band data is carried out the power adjustment.Power regulation module comprises ALC module, overdrive protection module, base band data selection output module three parts.
The ALC module can be carried out power amplifier automatic electric-level control and treatment to the energizing signal excessively in the average power timing statistics section, and the signal after will handling is exported to base band data selection output module; The overdrive protection module can be carried out the overdrive protection processing to the energizing signal excessively in the instantaneous power timing statistics section, and the signal after will handling is exported to base band data selection output module; Base band data selects output module to select base-band data signal to export to the filter of back level as required.
In device of the present invention, according to actual needs, can also only average power statistic to the input base band data, then,, the energizing signal of crossing in the average power timing statistics section is carried out power amplifier automatic electric-level control and treatment according to statistics.The input base band data is not carried out instantaneous power statistics and overdrive protection processing.Therefore, the another kind of implementation structure figure of device of the present invention as shown in Figure 8.Comprise as lower module:
Average power statistical module: be used to add up the average power of input base band data in time period Ta, and send statistics to power control module.
Power control module: be used for producing the ALC control command that power is adjusted, and the ALC control command that produces is sent to power regulation module according to the ALC control algolithm.
Power regulation module: be used for the ALC control command that sends according to power control module, the input base band data is carried out the power adjustment.Power regulation module comprises ALC module, base band data selection output module two parts.
The ALC module can be carried out power amplifier automatic electric-level control and treatment to the energizing signal excessively in the average power timing statistics section, and the signal after will handling is exported to base band data selection output module; Base band data selects output module to select base-band data signal to export to the filter of back level as required.
In device of the present invention, according to actual needs, can also only carry out the instantaneous power statistics to the input base band data, then,, the energizing signal of crossing in the instantaneous power timing statistics section is carried out too drastic guarantor's processing according to statistics.The input base band data is not averaged power statistic and power amplifier automatic electric-level control and treatment.Therefore, the another kind of implementation structure figure of device of the present invention as shown in Figure 9.Comprise as lower module:
The instantaneous power statistical module: be used to calculate the instantaneous power of input base band data at each chip, the statistics input signal is in the sampling point number N of the instantaneous power 〉=Pin_rating+MdB of Td in the time.And send statistics to power control module.
Power control module: be used for producing the overdrive protection control command that power is adjusted, and the overdrive protection control command that produces is sent to power regulation module according to the overdrive protection control algolithm.
Power regulation module: be used for the overdrive protection control command that sends according to power control module, the input base band data is carried out the power adjustment.Power regulation module comprises overdrive protection module, base band data selection output module two parts.
The overdrive protection module can be carried out the overdrive protection processing to the energizing signal excessively in the instantaneous power timing statistics section, and the signal after will handling is exported to base band data selection output module; Base band data selects output module to select base-band data signal to export to the filter of back level as required.
In the method for the invention, can average power statistic and instantaneous power statistics respectively to the input base band data according to actual needs, then, the input base band data is carried out corresponding power amplifier automatic electric-level control and treatment and overdrive protection processing respectively.Two kinds of power statistics and power adjustment are handled and can be carried out simultaneously, also can advanced Xingqi in a kind of power statistic and power adjustment, carry out another kind of power statistic and power adjustment then.In the method for the invention, can also only carry out a kind of power statistic and power adjustment according to actual needs to the input base band data.
Therefore, the method for the invention can have a lot of handling processes according to actual needs.
A kind of process chart of the method for the invention comprises the steps: as shown in Figure 5
Step 5-1, the control of power amplifier level and overdrive protection module receive from numeral closes the base band data that sends the module of road.
Step 5-2, the base band data that receives are sent to power statistic module and power regulation module simultaneously; average power statistic and instantaneous power statistics then in the power statistic module simultaneously, base band data is sent to ALC module, overdrive protection module simultaneously and is directly sent to base band data and selected output module in power regulation module.
The power statistic module is delivered to power control module with the result of average power statistics, power control module produces the control command that ALC power is adjusted according to the algorithm of the said ALC control in front, and the control command that produces is delivered to the ALC module, the ALC module is according to the control command of receiving, the base band data that receives is carried out the power adjustment, and send adjusted base band data to base band data selection output module.
The power statistic module is delivered to power control module with the result of instantaneous power statistics; power control module produces the control command that overdrive protection is adjusted according to the algorithm of the said overdrive protection control in front; and the control command that produces is delivered to the overdrive protection module; the overdrive protection module is according to the control command of receiving; the base band data that receives is carried out the power adjustment, and send adjusted base band data to base band data selection output module.
Step 5-3, base band data select output module to select suitable base band data to send the filter of back level to according to actual conditions.
If the result of average power statistics is Pa＞Pout_rating+XdB, then base band data selects output module to select the base band data of ALC module output to send the filter of back level to;
If the result of average power statistics is Pa≤Pout_rating+XdB, and the result of instantaneous power statistics is
Then base band data selects output module to select the base band data of overdrive protection module output to send the filter of back level to;
If the result of average power statistics is Pa≤Pout_rating+XdB, and the result of instantaneous power statistics is
Then base band data selects output module to select directly to export the filter that the base band data of coming sends the back level to.
So far, a kind of handling process of the method for the invention finishes, the base band data filtering of crossing through this flow processing too drastic composition, just can not cause overdriven of power amplifier alarm, the too drastic phenomenon of closing.
The present invention also provides the another kind of handling process of described method, as shown in Figure 6, comprises the steps:
Step 6-1, the control of power amplifier level and overdrive protection module receive from numeral closes the base band data that sends the module of road.
Step 6-2, the base band data that receives are sent to power statistic module and power regulation module simultaneously, average power statistic then in the power statistic module, base band data is sent to the ALC module simultaneously, and directly sends base band data to and select output module in power regulation module.
The power statistic module is delivered to power control module with the result of average power statistics, power control module produces the control command that ALC power is adjusted according to the algorithm of the said ALC control in front, and the control command that produces is delivered to the ALC module, the ALC module is according to the control command of receiving, the base band data that receives is carried out the power adjustment, and send adjusted base band data to base band data selection output module.
Step 6-3, base band data select output module to select suitable base band data to send subordinate's module to according to actual conditions.
If the result of average power statistics is Pa＞Pout_rating+XdB, then base band data selects output module to select the base band data of ALC module output to send subordinate's module to;
If the result of average power statistics is Pa≤Pout_rating+XdB, then base band data is selected output module to select directly to export the base band data of coming and is sent subordinate's module to;
The base band data that step 6-4, base band data select output module to select to select is sent to power statistic module and power regulation module simultaneously; carry out instantaneous power statistics then in the power statistic module, base band data is sent to the overdrive protection module simultaneously, and directly sends base band data to and select output module in power regulation module.
The power statistic module is delivered to power control module with the result of instantaneous power statistics; power control module produces the control command that overdrive protection is adjusted according to the algorithm of the said overdrive protection control in front; and the control command that produces is delivered to the overdrive protection module; the overdrive protection module is according to the control command of receiving; the base band data that receives is carried out the power adjustment, and send adjusted base band data to base band data selection output module.
Step 6-5, base band data select output module to select suitable base band data to send the filter of back level to according to actual conditions.
If the result of instantaneous power statistics is
Then base band data selects output module to select the base band data of overdrive protection module output to send the filter of back level to;
If the result of instantaneous power statistics is
Then base band data selects output module to select directly to export the filter that the base band data of coming sends the back level to.
So far, the another kind of handling process of the method for the invention finishes, the base band data filtering of crossing through this flow processing too drastic composition, just can not cause overdriven of power amplifier alarm, the too drastic phenomenon of closing.
The method of the invention is that this method also can be put into has carried out using after the intermediate frequency process to base band data at the power statistic of base band data and power amplifier protection.The method of the invention also can be applied to systems such as CDMA2000, GSM.The method of the invention also can realize in the analog communication field.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (12)
1, a kind of method that prevents overdriven of power amplifier is characterized in that, comprising:
A, the instantaneous power timing statistics and the parameter of signal being carried out power statistic are set;
B, according to the time and the parameter of described instantaneous power statistics, the signal transient power of statistical signal in instantaneous power timing statistics section is more than or equal to the sampling point number of the instantaneous power statistics threshold value of setting, the proportional numbers of this sampling point number and setting is compared, according to comparative result, signal power is adjusted in the output power range of power amplifier permission.
2, according to the described method that prevents overdriven of power amplifier of claim 1, it is characterized in that described signal comprises:
Baseband signal in the wireless communication system.
According to the described method that prevents overdriven of power amplifier of claim 1, it is characterized in that 3, described instantaneous power statistics threshold value is greater than a setting power number of the specified maximal input of radio frequency sending set.
According to the described method that prevents overdriven of power amplifier of claim 1, it is characterized in that 4, described instantaneous power timing statistics is: greater than 1 chip chip less than a time period in 1024 chip chip times.
5, according to claim 1 or 2 or the 3 or 4 described methods that prevent overdriven of power amplifier, it is characterized in that, described according to comparative result, signal power is adjusted in the output power range of power amplifier permission, specifically comprise:
If described sampling point number accounts for the ratio of statistics sum greater than the proportional numbers of handling the setting of starting to control threshold value as overdrive protection, then the signal power in the next timing statistics section is changed to zero or the output power range that allows of power amplifier in power number.
6, according to the described method that prevents overdriven of power amplifier of claim 5, it is characterized in that described method also comprises:
The average power timing statistics and the parameter of signal being carried out power statistic are set.
According to the described method that prevents overdriven of power amplifier of claim 6, it is characterized in that 7, described average power timing statistics is: more than or equal to 1024 chip chip, be less than or equal to a time period in 2048 chip chip times.
8, according to the described method that prevents overdriven of power amplifier of claim 6, it is characterized in that described method also comprises:
According to described average power timing statistics, the average power of statistical signal in described average power timing statistics section;
Setting is that power amplifier automatic electric-level control and treatment is started to control threshold value greater than a setting power numerical value of the specified peak power output of radio frequency sending set;
If described average power is started to control threshold value greater than power amplifier automatic electric-level control and treatment, then the signal power in the next average power timing statistics section is adjusted in the output power range of power amplifier permission, with the signal output after handling, output signal is carried out described steps A and B again.
9, the described according to Claim 8 method that prevents overdriven of power amplifier, it is characterized in that, described setting power numerical value adds setting numerical value greater than the specified peak power output of radio frequency sending set at least, this setting numerical value greater than 1db, be less than or equal to the signal maximum power and deduct the specified maximal input of radio frequency sending set.
10, a kind of device that prevents overdriven of power amplifier is characterized in that, comprising:
Power statistic module: be used for signal being carried out the instantaneous power timing statistics and the parameter of power statistic according to what be provided with, the signal transient power of statistical signal in instantaneous power timing statistics section sends this sampling point number to power control module more than or equal to the sampling point number of the instantaneous power statistics threshold value of setting;
Power control module: be used for the sampling point number that described power statistic module is transmitted and the proportional numbers of setting and compare, produce the control command that power is adjusted, and the control command that produces is sent to power regulation module according to comparative result;
Power regulation module: be used for the control command that sends according to power control module, described signal is carried out the power adjustment, signal power is adjusted in the output power range that power amplifier allows, and the signal that will handle is exported.
11, according to the described device that prevents overdriven of power amplifier of claim 10, it is characterized in that:
Described power statistic module comprises:
Instantaneous power statistical module: be used for the sampling point number of the signal transient power of statistical signal in instantaneous power timing statistics section, and send the sampling point number that counts to power control module more than or equal to instantaneous power statistics threshold value;
Described power control module; the sampling point number that described instantaneous power statistical module is sent and the proportional numbers of setting compare; if described sampling point number accounts for the ratio of statistics sum greater than the proportional numbers of handling the setting of starting to control threshold value as overdrive protection, then transmit control command to described power regulation module
Described power regulation module comprises:
The overdrive protection module: be used for the control command that sends according to described power control module, with the signal power in the next timing statistics section be changed to zero or the output power range that allows of power amplifier in power number, and the signal after will handling is exported.
12, according to the described device that prevents overdriven of power amplifier of claim 11, it is characterized in that:
Described power statistic module also comprises:
The average power statistical module: be used for before described instantaneous power statistical module carries out described number of samples purpose statistics, the average power of statistical signal in average power timing statistics section, and send the average power that counts to power control module;
Described power control module, be used for before described instantaneous power statistical module carries out described number of samples purpose statistics, the average power that described average power statistical module is sent and the power amplifier automatic electric-level control and treatment of setting are started to control threshold value and are compared, if described average power is started to control threshold value greater than described power amplifier automatic electric-level control and treatment, then transmit control command to described power regulation module;
Described power regulation module comprises:
Power amplifier automatic electric-level control module: be used for before described instantaneous power statistical module carries out described number of samples purpose statistics, the control command that sends according to power control module is with the average merit of the next one
Signal power in the timing statistics section is adjusted in the output power range of power amplifier permission, and
Signal after the processing is exported to the instantaneous power statistical module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510073001XA CN100459767C (en) | 2005-05-27 | 2005-05-27 | Method and device for preventing overdriven of power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510073001XA CN100459767C (en) | 2005-05-27 | 2005-05-27 | Method and device for preventing overdriven of power amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1870805A CN1870805A (en) | 2006-11-29 |
| CN100459767C true CN100459767C (en) | 2009-02-04 |
Family
ID=37444337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510073001XA Active CN100459767C (en) | 2005-05-27 | 2005-05-27 | Method and device for preventing overdriven of power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100459767C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105227144B (en) * | 2015-11-13 | 2018-07-13 | 中国电子科技集团公司第二十九研究所 | A kind of over-excitation protection circuit and its implementation of solid-state power amplifier |
| CN107426807A (en) * | 2017-05-26 | 2017-12-01 | 福建三元达科技有限公司 | The power control system and Poewr control method of relay station |
| CN107612588B (en) * | 2017-10-26 | 2019-06-25 | 京信通信系统（中国）有限公司 | A kind of power amplification protecting method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1041857A (en) * | 1996-07-23 | 1998-02-13 | Nec Corp | Mobile communication system transmitting device |
| CN1348262A (en) * | 2000-10-09 | 2002-05-08 | 华为技术有限公司 | Base station power controlling method and device |
| CN1371547A (en) * | 1999-08-31 | 2002-09-25 | 美商内数位科技公司 | Adaptive RF amplifier prelimiter |
| EP0751630B1 (en) * | 1995-06-30 | 2004-12-08 | Nec Corporation | Code division multiple access base station transmitter |
| US20040252785A1 (en) * | 2003-06-06 | 2004-12-16 | Interdigital Technology Corporation | Adjusting the amplitude and phase characteristics of transmitter generated wireless communication signals in response to base station transmit power control signals and known transmitter amplifier characteristics |
-
2005
- 2005-05-27 CN CNB200510073001XA patent/CN100459767C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0751630B1 (en) * | 1995-06-30 | 2004-12-08 | Nec Corporation | Code division multiple access base station transmitter |
| JPH1041857A (en) * | 1996-07-23 | 1998-02-13 | Nec Corp | Mobile communication system transmitting device |
| CN1371547A (en) * | 1999-08-31 | 2002-09-25 | 美商内数位科技公司 | Adaptive RF amplifier prelimiter |
| CN1348262A (en) * | 2000-10-09 | 2002-05-08 | 华为技术有限公司 | Base station power controlling method and device |
| US20040252785A1 (en) * | 2003-06-06 | 2004-12-16 | Interdigital Technology Corporation | Adjusting the amplitude and phase characteristics of transmitter generated wireless communication signals in response to base station transmit power control signals and known transmitter amplifier characteristics |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1870805A (en) | 2006-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4267454B2 (en) | Forward link power controlled repeater | |
| CN101141157B (en) | Uplink power control method and network side equipment | |
| CA2451976C (en) | Adaptive rf amplifier prelimiter | |
| EP1307971B1 (en) | Control of receiver immunity to interference by controlling linearity | |
| US6775541B2 (en) | Method and apparatus for controlling data rates to preserve voice quality in a CDMA system | |
| WO2002007464A1 (en) | Adaptive power management for a node of a cellular telecommunications network | |
| CN100459767C (en) | Method and device for preventing overdriven of power amplifier | |
| CN1249574A (en) | Method and arrangement for adaptive setting of initial service power | |
| EP1980032B1 (en) | Wireless subscriber communication unit and method of power control with back-off therefor | |
| WO1998010530A2 (en) | Optimizing forward link transmit power | |
| JP2009522918A (en) | Overload control device and method | |
| CN101742671A (en) | Wireless digital repeater station with carrier scheduling function and method for realizing carrier scheduling | |
| CN101442794B (en) | Method for controlling wireless terminal emission power and wireless terminal | |
| US7096035B2 (en) | Process and device for monitoring the transmission power of a mobile terminal, for example a cellular mobile telephone, in particular capable of operating according to the UMTS standard | |
| CN101953208B (en) | Wireless base station and method for determining transmission power | |
| CN101132209B (en) | Apparatus and method for automatic gain control | |
| CN101692614A (en) | Receiver and method for reducing obstructive interferences | |
| KR100841145B1 (en) | Method for controlling uplink speed and controlling call connection in a digital repeater receiving uplink signals separately | |
| CN201307855Y (en) | Base station signal tower top optimizing system | |
| CN101682341A (en) | increasing sensitivity of radio receiver | |
| CN100550680C (en) | A kind of method for controlling forward shared channel total power of cluster system | |
| CN101282146B (en) | Method for controlling overload of downlink emitter power | |
| CN102790985B (en) | Automatic optimization method for special scene cell | |
| CN100359979C (en) | A method for extending coverage area | |
| CN100474969C (en) | Method for realizing rapid congestion control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211221 Address after: 450046 Floor 9, building 1, Zhengshang Boya Plaza, Longzihu wisdom Island, Zhengdong New Area, Zhengzhou City, Henan Province Patentee after: xFusion Digital Technologies Co., Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |