CN101257331A - Gain automatic correction method and transmitter - Google Patents
Gain automatic correction method and transmitter Download PDFInfo
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- CN101257331A CN101257331A CNA2008100658839A CN200810065883A CN101257331A CN 101257331 A CN101257331 A CN 101257331A CN A2008100658839 A CNA2008100658839 A CN A2008100658839A CN 200810065883 A CN200810065883 A CN 200810065883A CN 101257331 A CN101257331 A CN 101257331A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/52—Transmission power control [TPC] using AGC [Automatic Gain Control] circuits or amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
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Abstract
The invention discloses a gain autocorrection sending machine, which comprises: an input digital power detection module for receiving the baseband signal, obtaining the incoming signal digital power based on the baseband signal; a signal processing module for processing the baseband signal from the input digital power detection module and outputting the radiofrequency signal, a power output module for magnifying and outputting the radiofrequency signal of the signal processing module, and regulating the gain of the radiofrequency signal based on the incoming signal digital power obtained by the input digital power detection module, the output signal digital power obtained by an output power digital detection module; the output power digital detection module for coupling the radiofrequency signal of the power output module, and obtains the output signal digital power based on the radiofrequency signal. The embodiment of the invention overcomes the average effect of the simulate detection in prior art, achieves the gain calibration in real time.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of gain automatic correction method and transmitter.
Background technology
In communication system, the downgoing baseband signal after the numerical portion processing, enters analog channel, through after the analog-modulated, by outputing to antennal interface after the radio frequency amplification.Radio characteristics such as the covering of base station require down going channel must guarantee a stable gain, could guarantee the power that one of antennal interface output and expection power equate like this, thereby satisfy the requirement of radio characteristics.But form down going channel (signal transformation, shaping filter, numeric field carrier wave close functions such as road, slicing, digital-to-analogue conversion (DAC), IQ modulation and up-conversion) device, can be because device batch, temperature, factors such as frequency fluctuations is very big, analogue device especially, by analysis, analog channel batch, the gain fluctuation that frequency and temperature are brought reaches 20dB.Since above-mentioned requirements and factor, thus must control the gain of descending loop, to guarantee the gain stabilization of down going channel.
Prior art solutions is, the digital signal of input transmitter is carried out digital input power to be detected, radiofrequency signal after amplifying output through transmitter is simulated the power output detection, by calculating the difference of simulation power output and digital input power, just can draw actual transmission channel gain, compare passage actual gain and target gain, just can calculate the channel gain error, by regulating the gain control part on the analog channel, thereby change the actual gain of transmission channel, and approach target gain gradually, till satisfying certain error requirements.
In realizing process of the present invention, the inventor finds that the prior art scheme has following problem at least:
The realistic simulation power output of antenna opening is drawn by the detection of forward direction simulated power wave detector.But, can not reflect the power of output in real time because the output of simulated power wave detector has average effect.Such as in the Wimax system, leader and data field power are not wait, if adopt the simulated power wave detector to be difficult to distinguish the power and the data field power of leader, cause gain controlling to have error, and because average effect, during variable power, can not be confirmed to be actual power and the still duty ratio of emission that causes has taken place to change take place to change and cause; By further research, the inventor finds that also prior art can not Tc changes or influence that frequency change is brought power output detection module such as forward direction simulated power wave detector, because the power output change detected that temperature or frequency change caused, can cause gain controlling fluctuation, and then cause channel gain Yin Wendu or frequency change and produce fluctuation.
Summary of the invention
Embodiments of the invention provide a kind of gain automatic correction method and automatic gain correction transmitter, to realize the real-time correction of gain.
Embodiments of the invention provide a kind of automatic gain correction transmitter, comprising:
The input digit power detection module, signal processing module, power output module, power output digital detection module;
Described input digit power detection module is used for receiving baseband signal, obtains input signal digital power value according to described baseband signal, and exports described baseband signal;
Described signal processing module is used to handle the baseband signal from described input digit power detection module, the output radiofrequency signal;
Described power output module, be used for the radiofrequency signal from described signal processing module is amplified output, and, regulate gain to described radiofrequency signal according to the output signal digital power value that the input signal digital power value of being obtained by the input digit power detection module, power output digital detection module are obtained;
Described power output digital detection module, the radiofrequency signal from described power output module of being used to be coupled according to described radiofrequency signal, is obtained described output signal digital power value.
Embodiments of the invention provide a kind of gain automatic correction method, comprising:
Obtain input signal digital power value according to baseband signal;
Obtain output signal digital power value according to the radiofrequency signal after amplifying;
Regulate gain according to described input signal digital power value and described output signal digital power value to radiofrequency signal.
Compare with the prior art scheme, gain automatic correction method of the present invention and automatic gain correction transmitter embodiment are by adopting feedback receive path digital detection at the transmitter output, overcome the average effect of simulation detection in the prior art, can reach the effect that realtime power detects, and then realize the real-time gain correction.
Real-time example of the present invention also provides a kind of transmitter corrected parameter deriving means and a kind of transmitter corrected parameter acquisition methods, to obtain the transmitter corrected parameter:
Embodiments of the invention provide a kind of transmitter corrected parameter deriving means, comprising:
Power output digital detection module, the radiofrequency signal of the transmitter output that is used to be coupled according to described radiofrequency signal, is obtained output signal digital power value;
Power output simulation detection module, the radiofrequency signal of the transmitter output that is used to be coupled according to described radiofrequency signal, is obtained the output signal simulation performance number;
The corrected parameter computing module is used for obtaining corrected parameter according to described output signal digital power value and described output signal simulation performance number.
Embodiments of the invention provide a kind of transmitter corrected parameter acquisition methods, comprising:
Radiofrequency signal according to transmitter output is obtained output signal digital power value;
Radiofrequency signal according to transmitter output is obtained the output signal simulation performance number;
Obtain corrected parameter according to described output signal digital power value and described output signal simulation performance number.
Above-mentioned transmitter corrected parameter acquisition methods and device embodiment are by carrying out digital detection and simulation detection to the radiofrequency signal of transmitter output, obtain output signal digital power value and output signal simulation performance number, and then obtain corrected parameter (frequency corrected parameter and/or temperature corrected parameter).This corrected parameter can be used to guarantee the gain stabilization of tested transmitter down going channel in setting working temperature and/or frequency range.
Description of drawings
Fig. 1 is in the embodiment of the invention one, the schematic diagram of automatic gain correction transmitter;
Fig. 2 is in the embodiment of the invention two, the flow chart of gain automatic correction method;
Fig. 3 is in the embodiment of the invention three, transmitter corrected parameter deriving means schematic diagram;
Fig. 4 is in the embodiment of the invention four, transmitter corrected parameter acquisition methods flow chart;
Embodiment
Embodiments of the invention provide a kind of gain automatic correction method and automatic gain correction transmitter, by adopt feedback receive path digital detection at the transmitter output, the average effect that has overcome the simulation detection can reach the effect that realtime power detects, further, by introducing corrected parameter (frequency corrected parameter and/or temperature corrected parameter), can guarantee the gain stabilization of down going channel in setting working temperature and/or frequency range.
Embodiments of the invention also provide a kind of acquisition methods and device of transmitter corrected parameter, by the radiofrequency signal of transmitter output being carried out digital detection and simulation detection, obtain output signal digital power value and output signal simulation performance number, and then can obtain corrected parameter (frequency corrected parameter and/or temperature corrected parameter).This corrected parameter can be used to guarantee the gain stabilization of tested transmitter down going channel in setting working temperature and/or frequency range.
For making technical scheme of the present invention and advantage clearer, embodiments of the invention are described in further detail below in conjunction with accompanying drawing.
Embodiments of the invention one relate to a kind of automatic gain correction transmitter, as shown in Figure 1, comprising:
Input digit power detection module 100, signal processing module 110, power output module 120, power output digital detection module 130;
Input digit power detection module 100 is used for receiving baseband signal, obtains input signal digital power value according to this baseband signal, and exports above-mentioned baseband signal; Input digit power detection module 100 can adopt FPGA or ASIC to realize.
Signal processing module 110 is used to handle the baseband signal from input digit power detection module 100, the output radiofrequency signal; This signal processing module 110 can be selected different functional modules according to the kind of processing signals, and these functional modules can comprise that as signal transformation shaping filter, numeric field carrier wave close road, slicing, digital-to-analogue conversion (DAC), IQ modulation or up-conversion etc.
Power output module 120, be used for the radiofrequency signal from signal processing module 110 is amplified output, and, regulate gain to this radiofrequency signal according to the output signal digital power value that the input signal digital power value of being obtained by input digit power detection module 100, power output digital detection module 130 are obtained;
Power output digital detection module 130, the radiofrequency signal from power output module 120 of being used to be coupled according to this radiofrequency signal, is obtained output signal digital power value.
Power output digital detection module 130 can also comprise:
Feedback path receiver 131 is used for coupling is reduced into baseband signal from the radiofrequency signal of power output module 120;
Output digital power detection module 132 obtains output signal digital power value according to the baseband signal after the reduction.Output digital power detection module 132 can adopt FPGA or ASIC to realize.
Power output module 120 can also comprise:
Memory module 123 is used to store target gain value and corrected parameter; Target gain value and corrected parameter can be prior setting, above-mentioned target gain value is the gain to signal of the down going channel estimated, it is the desired ideal gain value that reaches of down going channel, its value depends on the characteristic (also power output digital detection module can be taken into account the influence of signal gain) of different capacity class requirement (by the base station system decision) and down going channel, and this target gain value storage data format can be tables of data; Above-mentioned corrected parameter can comprise power output temperature corrected parameter and/or power output frequency corrected parameter, corresponding different temperature and/or frequencies has different corrected parameters, its storage data format can be a tables of data, this corrected parameter is used for the modifying factor temperature and/or signal frequency changes the power output variation that is brought, and especially can be used for modifying factor feedback receive path (present embodiment is power output digital detection module) and be subjected to temperature and/or frequency change to influence the error that is produced.Above-mentioned corrected parameter can record and store stand-by by embodiment three, four apparatus and method that provided.
Power arithmetic module 122, be used for obtaining the target output value according to above-mentioned target gain value and input signal digital power value, and obtain the real output value, and obtain the gain calibration amount according to the difference of this target output value and real output value according to above-mentioned corrected parameter and output signal digital power value; When choosing corrected parameter and target gain value, Power arithmetic module 122 can be obtained the respective objects yield value according to the current power grade, chooses corresponding output power temperature corrected parameter and/or power output frequency corrected parameter in the corrected parameter table of being deposited in memory module 123 according to current temperature and/or signal frequency.
When the target gain value in the present embodiment and input signal digital power value all take logarithm to represent, herein Power arithmetic module 122 can by ask for target gain value and input signal digital power value and, can obtain the target output value, when the corrected parameter in the present embodiment and output signal digital power value all take logarithm to represent, herein Power arithmetic module 122 can by ask for power output temperature corrected parameter and/or power output frequency corrected parameter and output signal digital power value and, can obtain the real output value.
Above-mentioned Power arithmetic module 122, output digital power detection module 132, digital power detection module 100 can adopt CPU or FPGA or ASIC to realize respectively, export certainly digital power detection module 132, digital power detection module 100 and Power arithmetic module 122 also can a shared FPGA or CPU or ASIC realize.
Gain control module 121 is used for according to above-mentioned gain calibration amount, regulates the gain to above-mentioned radiofrequency signal; Gain control module 121 can adopt gain adjustable amplifier spare to realize.
Embodiments of the invention one carry out digital detection by adopt feedback receiver and output digital power detection module at the transmitter output, overcome the average effect of simulation detection in the prior art, can reach the effect that realtime power detects, and then realize the real-time gain correction; Further, can guarantee the gain stabilization of down going channel in setting working temperature and/or frequency range owing to introduced corrected parameter (frequency corrected parameter and/or temperature corrected parameter).
Embodiments of the invention two relate to a kind of gain automatic correction method, as shown in Figure 2, comprise the steps:
S110: obtain input signal digital power value according to baseband signal;
Baseband signal is a digital signal, can record its digital power value by the digital power detection module among the embodiment one, and in the present embodiment, baseband signal is input signal, and above-mentioned input signal digital power value is baseband signal digital power value.
Digital power in this step (being the power of numeric field signal) is defined as the average power signal size with respect to the full scale peak power, adopts logarithm to represent unit: dBFS.
Formula is described below:
X=10 * log10 (the linear average power of signal/full scale power)
For N bit signed number, the perhaps digital signal s of N-1 bit unsigned number (n):
Full scale power=(2^ (N-1)) ^2
Linear average power=the mean (s (n) ^2) of signal
Mean () is an average function in the following formula.
For N bit signed number, the perhaps digital I road of N-1 bit unsigned number and Q road signal:
The linear average power of signal=(I route average power+Q route average power)/2
Full scale power=(2^ (N-1)) ^2
Is that s (n) is example with the baseband signal, can sets a measuring period, the digital power of baseband signal is periodically detected, the bit number of the baseband signal of receiving in sense cycle is N.Can change measuring period according to real needs, thereby regulate the accuracy of the digital power value of surveying, for example reducing measuring period can increase the accuracy and the real-time of the digital power value of surveying, and vice versa.
S120: obtain output signal digital power value according to the radiofrequency signal after amplifying;
Baseband signal is handled through a series of signal of transmitter transmission channel and is become radiofrequency signal, output after amplifying, measuring its digital power value specifically can be divided into following steps (above-mentioned signal processing can be finished by the signal processing module among the embodiment one, amplifying output can be finished by the power output module among the embodiment one, and the digital power value is measured and can be finished by the power output digital detection module among the embodiment one):
A1: the radiofrequency signal after the above-mentioned amplification is reduced into baseband signal;
Can it be reduced into baseband signal by being coupling in the feedback path receiver received RF signal on the transmission channel among the embodiment one.
B1: obtain output signal digital power value according to the baseband signal after the reduction.
Utilize the digital power value of the baseband signal that the detection of digital power detection module is come by the radiofrequency signal reduction among the embodiment one, measuring output signal digital power value carries out synchronously with measurement input signal digital power value, it is identical with the sense cycle of step S110 to be that the sense cycle in B1 step can be set at, and detects terminal and align in time.In the present embodiment, output signal digital power value is the digital power value of the baseband signal after the reduction.
S130: regulate gain to radiofrequency signal according to above-mentioned input signal digital power value and above-mentioned output signal digital power value.This step can be to obtain the gain calibration amount according to input signal digital power value and output signal digital power value, according to the gain of gain calibration amount adjusting to radiofrequency signal, specifically can be divided into following steps again:
A2: obtain target gain value and corrected parameter;
Target gain value and corrected parameter can be prior setting, above-mentioned target gain value is the gain to signal of the down going channel estimated, it is the desired ideal gain value that reaches of down going channel, its value depends on the characteristic of different capacity class requirement (by the base station system decision) and down going channel, and (also the feedback path power detection can be taken into account the influence of signal gain) this target gain value storage data format can be tables of data; Above-mentioned corrected parameter comprises power output temperature corrected parameter and/or power output frequency corrected parameter, corresponding different temperature and/or frequencies has different corrected parameters, this corrected parameter storage data format can be tables of data, and this corrected parameter is used to revise temperature and/or signal frequency changes the power output variation that is brought.Above-mentioned corrected parameter can record and be stored in the memory module among the embodiment one stand-by by embodiment three, four apparatus and method that provided.
After configuring target gain value and corrected parameter table, can obtain target gain value according to the current power grade; Obtain corresponding corrected parameter according to Current Temperatures and/or current output signal frequency, be specially according to Current Temperatures and obtain power output temperature corrected parameter, and/or obtain power output frequency corrected parameter according to current output signal frequency, above-mentioned corrected parameter can obtain in default corrected parameter table, and above-mentioned target gain value can be obtained in default target gain value table.
B2: target gain value and above-mentioned input signal digital power value according to above-mentioned acquisition are obtained the target output value;
When the target gain value in the present embodiment and input signal digital power value all take logarithm to represent, herein can by ask for target gain value and input signal digital power value and, can obtain the target output value.
C2: obtain the real output value according to above-mentioned corrected parameter and above-mentioned output signal digital power value;
When the corrected parameter in the present embodiment and output signal digital power value all take logarithm to represent, herein can by ask for corrected parameter and output signal digital power value and, can obtain the real output value, as asking for value power output temperature corrected parameter and/or power output frequency corrected parameter and output signal digital power value and that obtain real output.
D2: the difference according to above-mentioned target output value and above-mentioned real output value is obtained the gain calibration amount;
Steps A 2～D2 can be finished by Power arithmetic module and memory module among the embodiment one.
E2:, regulate gain to above-mentioned radiofrequency signal according to above-mentioned gain calibration amount.This step can be finished by the gain control module among the embodiment one.
But step S110～S130 cycle carries out, and order in no particular order.
Embodiments of the invention two by adopt feedback receive path digital detection at the transmitter output, have overcome the average effect of simulation detection in the prior art, can reach the effect that realtime power detects, and then the realization real-time gain are proofreaied and correct.Further, owing to introduced corrected parameter (frequency corrected parameter and/or temperature corrected parameter), can guarantee the gain stabilization of down going channel in setting working temperature and/or frequency range.
Embodiments of the invention three relate to a kind of transmitter corrected parameter deriving means, are used for obtaining the corrected parameter that embodiment one or two uses, and as shown in Figure 3, comprising:
Power output digital detection module 230, the radiofrequency signal of the transmitter output that is used to be coupled according to this radiofrequency signal, is obtained output signal digital power value; Output signal digital power value is the digital power value of the radiofrequency signal of transmitter output in the present embodiment.
Power output simulation detection module 210, the radiofrequency signal of the transmitter output that is used to be coupled according to this radiofrequency signal, is obtained the output signal simulation performance number; The output signal simulation performance number is the simulated power value of the radiofrequency signal of transmitter output in the present embodiment, when output signal is that duty ratio is when being not 100%, output simulation detection module can be converted measured simulated power value according to the actual signal duty ratio, as the output signal simulation performance number, power output simulation detection module 210 can realize with the simulated power meter with the value after the conversion.
Corrected parameter computing module 220 is used for obtaining corrected parameter according to above-mentioned output signal digital power value and described output signal simulation performance number; It links to each other with above-mentioned power output digital detection module 230, power output simulation detection module 210 respectively.
Corrected parameter can comprise power output temperature corrected parameter and/or power output frequency corrected parameter, power output temperature corrected parameter that different temperature and/or signal frequency are corresponding different and/or different power output frequency corrected parameters.
In the present embodiment, the difference that the value of corrected parameter is output signal simulation performance number and output signal digital power value deducts poor (above-mentioned performance number is logarithm and represents) of output signal simulation performance number and output signal digital power value under fiducial temperature and the reference frequency, mean temperature when fiducial temperature can be set at the transmitter operate as normal, reference frequency can be set at the middle frequency of transmitter output.Corrected parameter computing module 220 can be stored the poor of the output signal simulation performance number obtained under this fiducial temperature and the reference frequency and output signal digital power value.
Power output digital detection module 230 can also comprise:
Output digital power detection module 232 obtains output signal digital power value according to the baseband signal after the reduction.In the present embodiment, output signal digital power value is the digital power value of the baseband signal after the reduction.Digital power detection module 232 can adopt FPGA or ASIC to realize.
Power output digital detection module 230 is carried out synchronously with the detection of power output simulation detection module 210, and its sense cycle is identical, and the time terminal of detection is alignd mutually.
Embodiment three described transmitter corrected parameter deriving means, by deferent segment power output digital detection module and power output simulation detection module are set at transmitter, the corrected parameter that obtains, use this corrected parameter can effectively compensate the transmitter power departure (especially can be used for modifying factor power output detection module is subjected to temperature and/or frequency change to influence the error that is produced) that causes because of variations in temperature and/or frequency change, guaranteed in the setpoint frequency and/or the consistency of power output in the design temperature scope.
Embodiments of the invention four relate to a kind of transmitter corrected parameter acquisition methods, as shown in Figure 4, comprise the steps:
S210: the radiofrequency signal according to transmitter output is obtained output signal digital power value;
The radiofrequency signal digital power value of measurand transmitter output specifically can be divided into following steps:
A3: above-mentioned radiofrequency signal is reduced into baseband signal;
Can it be reduced into baseband signal by as being coupling in the feedback path receiver received RF signal on the transmitter transmission channel among the embodiment three in the present embodiment.
B3: obtain output signal digital power value according to the baseband signal after the reduction.
Can utilize the digital power value of the baseband signal that the detection of digital power detection module is come by the radiofrequency signal reduction among the embodiment three, here can set a measuring period, digital power to baseband signal periodically detects, can change measuring period according to real needs, thereby regulate the accuracy of the digital power value of surveying, for example reducing measuring period can increase the accuracy and the real-time of the digital power value of surveying, and vice versa.In the present embodiment, output signal digital power value is the digital power value of the baseband signal after the reduction.
S220: the radiofrequency signal according to transmitter output is obtained the output signal simulation performance number;
The output signal simulation performance number is the simulated power value of the radiofrequency signal of transmitter output in the present embodiment, can simulate the detection module by the power output that is coupled with the transmitter transmission channel as embodiment three described in and measure.
S230: obtain corrected parameter according to above-mentioned output signal digital power value and above-mentioned output signal simulation performance number.
Corrected parameter can comprise power output temperature corrected parameter and/or power output frequency corrected parameter, power output temperature corrected parameter that different temperature and/or signal frequency are corresponding different and/or different power output frequency corrected parameters.
In the present embodiment, the difference that the value of corrected parameter is output signal simulation performance number and output signal digital power value deducts poor (above-mentioned performance number is logarithm and represents) of output signal simulation performance number and output signal digital power value under fiducial temperature and the reference frequency, mean temperature when fiducial temperature can be set at the transmitter operate as normal, reference frequency can be set at the middle frequency of transmitter output.
For example when obtaining the power output temperature corrected parameter of different temperatures correspondence, can (this step can be carried out in temperature test chamber by-25 ℃ to+60 ℃ stepping adjustment with the working temperature of tested transmitter (as embodiment one described transmitter), also can realize by the temperature control device of transmitter self, temperature measurement range also can be adjusted as the case may be), in this process, can close the automatic gain correction function of above-mentioned transmitter, and the configuration output frequency is middle frequency, the step that repeats above-mentioned S210～S230 at different temperature spots can obtain the power output temperature corrected parameter of different temperatures correspondence, these parameters can directly deposit (this moment, the linear interpolation step of data can be finished by the Power arithmetic unit) in the middle of the memory cell as embodiment one described transmitter in, can certainly be with in this memory cell of restoring after these linear-in-the-parameter interpolation.
When obtaining the power output frequency corrected parameter of different frequency correspondence, the output frequency of tested transmitter (as embodiment one described transmitter) can be adjusted to the high frequency points stepping by low frequency, during the course, can close the automatic gain correction function of above-mentioned transmitter, and the transmitter working temperature is set at fiducial temperature.The step that repeats above-mentioned S210～S230 at different frequencies can obtain the power output temperature corrected parameter of different frequent points correspondence, these parameters can directly deposit (this moment, the linear interpolation step of data can be finished by the Power arithmetic unit) in the middle of the memory cell as embodiment one described transmitter in, can certainly be with in this memory cell of restoring after these linear-in-the-parameter interpolation.
Embodiment four described transmitter corrected parameter acquisition methods are by carrying out digital detection and simulation detection to the radiofrequency signal of transmitter output, obtain output signal digital power value and output signal simulation performance number, and then obtain corrected parameter, can effectively compensate the transmitter power departure (especially can be used for modifying factor power output detection module is subjected to temperature and/or frequency change to influence the error that is produced) that causes because of variations in temperature and/or frequency change, guarantee in the setpoint frequency and/or the consistency of power output in the design temperature scope.
The above embodiment of the present invention has overcome the average effect of simulation detection by at transmitter output employing feedback receive path digital detection, can reach the effect that realtime power detects, and then realize the real-time gain correction.Further, since corrected parameter (power output temperature corrected parameter and/or power output frequency corrected parameter) obtain and use the consistency that has also guaranteed transmitter power output in setpoint frequency and/or in the design temperature scope.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (11)
1. an automatic gain correction transmitter is characterized in that, comprising:
The input digit power detection module, signal processing module, power output module, power output digital detection module;
Described input digit power detection module is used for receiving baseband signal, obtains input signal digital power value according to described baseband signal, and exports described baseband signal;
Described signal processing module is used to handle the baseband signal from described input digit power detection module, the output radiofrequency signal;
Described power output module, be used for the radiofrequency signal from described signal processing module is amplified output, and, regulate gain to described radiofrequency signal according to the output signal digital power value that the input signal digital power value of being obtained by the input digit power detection module, power output digital detection module are obtained;
Described power output digital detection module, the radiofrequency signal from described power output module of being used to be coupled according to described radiofrequency signal, is obtained described output signal digital power value.
2. automatic gain correction transmitter according to claim 1 is characterized in that, power output digital detection module comprises:
The feedback path receiver is used for coupling is reduced into baseband signal from the radiofrequency signal of described power output module;
Output digital power detection module obtains described output signal digital power value according to the baseband signal after the reduction.
3. automatic gain correction transmitter according to claim 1 is characterized in that power output module comprises:
Memory module is used to store target gain value and corrected parameter;
The Power arithmetic module, be used for obtaining the target output value according to described target gain value and described input signal digital power value, and obtain the real output value, and obtain the gain calibration amount according to the difference of described target output value and described real output value according to described corrected parameter and described output signal digital power value;
Gain control module is used for according to described gain calibration amount, regulates the gain to described radiofrequency signal.
4. a transmitter corrected parameter deriving means is characterized in that, comprising:
Power output digital detection module, the radiofrequency signal of the transmitter output that is used to be coupled according to described radiofrequency signal, is obtained output signal digital power value;
Power output simulation detection module, the radiofrequency signal of the transmitter output that is used to be coupled according to described radiofrequency signal, is obtained the output signal simulation performance number;
The corrected parameter computing module is used for obtaining corrected parameter according to described output signal digital power value and described output signal simulation performance number.
5. device according to claim 4 is characterized in that, power output digital detection module also comprises:
The feedback path receiver is used for the radiofrequency signal of coupling spontaneous emission machine is reduced into baseband signal;
Output digital power detection module obtains described output signal digital power value according to the baseband signal after the reduction.
6. gain automatic correction method is characterized in that comprising:
Obtain input signal digital power value according to baseband signal;
Obtain output signal digital power value according to the radiofrequency signal after amplifying;
Regulate gain according to described input signal digital power value and described output signal digital power value to radiofrequency signal.
7. method as claimed in claim 6 is characterized in that, describedly obtains output signal digital power value according to the radiofrequency signal after amplifying, and specifically comprises:
Radiofrequency signal after the described amplification is reduced into baseband signal;
Obtain output signal digital power value according to the baseband signal after the reduction.
8. method as claimed in claim 6 is characterized in that, describedly regulates gain to radiofrequency signal according to described input signal digital power value and described output signal digital power value, specifically comprises:
Obtain target gain value and corrected parameter;
Obtain the target output value according to described target gain value and described input signal digital power value;
Obtain the real output value according to described corrected parameter and described output signal digital power value;
Difference according to described target output value and described real output value is obtained the gain calibration amount;
According to described gain calibration amount, regulate gain to described radiofrequency signal.
9. method as claimed in claim 8 is characterized in that, obtains target gain value and corrected parameter, is specially:
Obtain target gain value according to the current power grade;
Obtain corresponding corrected parameter according to Current Temperatures and/or current output signal frequency;
Described corrected parameter comprises power output temperature corrected parameter and/or power output frequency corrected parameter.
10. a transmitter corrected parameter acquisition methods is characterized in that, comprising:
Radiofrequency signal according to transmitter output is obtained output signal digital power value;
Radiofrequency signal according to transmitter output is obtained the output signal simulation performance number;
Obtain corrected parameter according to described output signal digital power value and described output signal simulation performance number.
11. method as claimed in claim 10 is characterized in that, obtains output signal digital power value according to the radiofrequency signal of transmitter output, specifically comprises:
Described radiofrequency signal is reduced into baseband signal;
Obtain output signal digital power value according to the baseband signal after the reduction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100658839A CN101257331B (en) | 2008-03-20 | 2008-03-20 | Gain automatic correction method and transmitter |
| PCT/CN2009/070880 WO2009115047A1 (en) | 2008-03-20 | 2009-03-19 | Automatic gain correction method and transmitter |
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| CN2008100658839A CN101257331B (en) | 2008-03-20 | 2008-03-20 | Gain automatic correction method and transmitter |
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| CN101257331A true CN101257331A (en) | 2008-09-03 |
| CN101257331B CN101257331B (en) | 2012-07-25 |
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| CN2008100658839A Active CN101257331B (en) | 2008-03-20 | 2008-03-20 | Gain automatic correction method and transmitter |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101257331B (en) | 2012-07-25 |
| WO2009115047A1 (en) | 2009-09-24 |
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