CN101257331B - Gain automatic correction method and transmitter - Google Patents

Abstract

The invention discloses a transmitter with automatic gain correction, which includes: an input digital power detection module for receiving a baseband signal, acquiring a digital power value of the input signal according to the baseband signal, and outputting the baseband signal; a signal processing module for Process the baseband signal from the input digital power detection module, and output the radio frequency signal; the power output module is used to amplify and output the radio frequency signal from the signal processing module, and according to the digital power of the input signal obtained by the input digital power detection module The output signal digital power value obtained by the output power digital detection module adjusts the gain of the radio frequency signal; the output power digital detection module is used to couple the radio frequency signal from the power output module, and according to the radio frequency signal, obtain The digital power value of the output signal. The embodiment of the present invention overcomes the average effect of analog detection in the prior art, and realizes real-time gain correction.

Description

A Gain Automatic Calibration Method and Transmitter

technical field

The invention relates to the field of communication technology, in particular to a gain automatic correction method and a transmitter.

Background technique

In the communication system, the downlink baseband signal enters the analog channel after being processed by the digital part, and after analog modulation, it is amplified by radio frequency and output to the antenna interface. The wireless characteristics such as the coverage of the base station require that the downlink channel must ensure a stable gain, so as to ensure that the antenna interface outputs a power equal to the expected power, thereby meeting the requirements of the wireless characteristics. However, the devices that make up the downlink channel (signal conversion, shaping filter, digital domain carrier combination, clipping, digital-to-analog conversion (DAC), IQ modulation, and up-conversion) will fluctuate due to factors such as device batches, temperature, and frequency. It is very large, especially for analog devices. After analysis, the batch of analog channels, the gain fluctuation caused by frequency and temperature can reach 20dB. Due to the above requirements and factors, it is necessary to control the gain of the downlink loop to ensure the stability of the gain of the downlink channel.

The solution in the prior art is to perform digital input power detection on the digital signal input to the transmitter, perform analog output power detection on the RF signal amplified and output by the transmitter, and calculate the difference between the analog output power and the digital input power, The actual gain of the transmitting channel can be obtained, and the channel gain error can be calculated by comparing the actual gain of the channel with the target gain. By adjusting the gain control part on the analog channel, the actual gain of the transmitting channel can be changed and gradually approach the target gain. until certain error requirements are met.

In the process of realizing the present invention, the inventors have found that the prior art solutions have at least the following problems:

The actual analog output power of the antenna port is detected by the forward analog power detector. However, due to the average effect of the output of the analog power detector, it cannot reflect the output power in real time. For example, in the Wimax system, the power of the preamble area and the data area are not equal. If an analog power detector is used to distinguish the power of the preamble area and the power of the data area, there will be errors in gain control, and due to the averaging effect, when the power changes, It is also impossible to confirm whether it is caused by a change in the actual power or a change in the duty cycle of the emission; through further research, the inventor also found that the prior art cannot correct temperature changes or frequency changes to the output power detection module as before. The effect on analog power detectors is that changes in output power detection due to changes in temperature or frequency can cause fluctuations in gain control, which in turn can cause fluctuations in channel gain due to changes in temperature or frequency.

Contents of the invention

The embodiment of the present invention provides an automatic gain correction method and a gain automatic correction transmitter, so as to realize real-time correction of the gain.

An embodiment of the present invention provides an automatic gain correction transmitter, including:

Input digital power detection module, signal processing module, power output module, output power digital detection module;

The input digital power detection module is used to receive a baseband signal, acquire a digital power value of the input signal according to the baseband signal, and output the baseband signal;

The signal processing module is used to process the baseband signal from the input digital power detection module and output a radio frequency signal;

The power output module is used to amplify and output the radio frequency signal from the signal processing module, and according to the digital power value of the input signal obtained by the input digital power detection module and the digital power value of the output signal obtained by the output power digital detection module, adjusting the gain of the radio frequency signal;

The output power digital detection module is used to couple the radio frequency signal from the power output module, and obtain the digital power value of the output signal according to the radio frequency signal.

An embodiment of the present invention provides a method for automatic gain correction, including:

Obtain the digital power value of the input signal according to the baseband signal;

Obtain the digital power value of the output signal according to the amplified radio frequency signal;

Adjust the gain of the radio frequency signal according to the digital power value of the input signal and the digital power value of the output signal.

Compared with the prior art solution, the embodiment of the automatic gain correction method and the automatic gain correction transmitter of the present invention overcomes the average effect of the analog detection in the prior art by adopting the digital detection of the feedback receiving channel at the output end of the transmitter, and can achieve The effect of real-time power detection, and then realize real-time gain correction.

The real-time example of the present invention also provides a transmitter correction parameter acquisition device and a transmitter correction parameter acquisition method, to obtain the transmitter correction parameters:

An embodiment of the present invention provides a transmitter correction parameter acquisition device, including:

The output power digital detection module is used to couple the radio frequency signal output by the transmitter, and obtain the digital power value of the output signal according to the radio frequency signal;

The output power analog detection module is used to couple the radio frequency signal output by the transmitter, and obtain the analog power value of the output signal according to the radio frequency signal;

A correction parameter calculation module, configured to obtain a correction parameter according to the digital power value of the output signal and the analog power value of the output signal.

An embodiment of the present invention provides a method for acquiring correction parameters of a transmitter, including:

Obtain the digital power value of the output signal according to the radio frequency signal output by the transmitter;

Obtain the analog power value of the output signal according to the RF signal output by the transmitter;

A correction parameter is obtained according to the output signal digital power value and the output signal analog power value.

The above embodiments of the transmitter correction parameter acquisition method and device embodiment perform digital detection and analog detection on the radio frequency signal output by the transmitter to obtain the digital power value of the output signal and the analog power value of the output signal, and then obtain the correction parameters (frequency correction parameters and/or temperature correction parameter). This correction parameter can be used to ensure that the gain of the downlink channel of the transmitter under test is stable within the set operating temperature and/or frequency range.

Description of drawings

FIG. 1 is a schematic diagram of a transmitter with automatic gain correction in Embodiment 1 of the present invention;

Fig. 2 is a flow chart of the gain automatic correction method in Embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of a transmitter correction parameter acquisition device in Embodiment 3 of the present invention;

FIG. 4 is a flow chart of a method for acquiring correction parameters of a transmitter in Embodiment 4 of the present invention;

Detailed ways

The embodiment of the present invention provides an automatic gain correction method and a gain automatic correction transmitter. By adopting the digital detection of the feedback receiving channel at the output end of the transmitter, the average effect of the analog detection can be overcome, and the effect of real-time power detection can be achieved. Further, , by introducing a correction parameter (frequency correction parameter and/or temperature correction parameter), it can ensure that the gain of the downlink channel is stable within the set working temperature and/or frequency range.

The embodiment of the present invention also provides a method and device for obtaining correction parameters of a transmitter, by performing digital detection and analog detection on the radio frequency signal output by the transmitter, the digital power value of the output signal and the analog power value of the output signal are obtained, and then can be Correction parameters (frequency correction parameters and/or temperature correction parameters) are obtained. This correction parameter can be used to ensure that the gain of the downlink channel of the transmitter under test is stable within the set operating temperature and/or frequency range.

In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Embodiment 1 of the present invention relates to an automatic gain correction transmitter, as shown in FIG. 1 , including:

Input digital power detection module 100, signal processing module 110, power output module 120, output power digital wave detection module 130;

The input digital power detection module 100 is used to receive the baseband signal, obtain the digital power value of the input signal according to the baseband signal, and output the baseband signal; the input digital power detection module 100 can be realized by FPGA or ASIC.

The signal processing module 110 is used to process the baseband signal from the input digital power detection module 100, and output the radio frequency signal; the signal processing module 110 can select different functional modules according to the type of processed signal, and these functional modules can include such as signal conversion, shaping Filtering, digital domain carrier combining, clipping, digital-to-analog conversion (DAC), IQ modulation, or frequency upconversion, etc.

The power output module 120 is used to amplify and output the radio frequency signal from the signal processing module 110, and according to the digital power value of the input signal obtained by the input digital power detection module 100 and the digital power value of the output signal obtained by the output power digital detection module 130, adjusting the gain of the radio frequency signal;

The output power digital detection module 130 is configured to couple the radio frequency signal from the power output module 120, and obtain the digital power value of the output signal according to the radio frequency signal.

The output power digital detection module 130 can also include:

The feedback channel receiver 131 is used to restore the radio frequency signal coupled from the power output module 120 into a baseband signal;

The output digital power detection module 132 acquires the digital power value of the output signal according to the restored baseband signal. The output digital power detection module 132 can be realized by FPGA or ASIC.

The power output module 120 may also include:

The storage module 123 is used to store the target gain value and the correction parameter; the target gain value and the correction parameter can be set in advance, and the above-mentioned target gain value is the estimated gain of the downlink channel to the signal, which is the desired ideal gain of the downlink channel Value, its value depends on different power level requirements (determined by the base station system) and the characteristics of the downlink channel (the impact of the output power digital detection module on the signal gain can also be taken into account), the target gain value storage data format can be data Table; the above-mentioned correction parameters can include output power temperature correction parameters and/or output power frequency correction parameters, corresponding to different temperatures and/or frequencies, there are different correction parameters, and the storage data format can be a data table, and the correction parameters are used for correction The change of output power caused by the change of temperature and/or signal frequency can especially be used to correct the error caused by the feedback receiving channel (in this embodiment, the output power digital detection module) affected by the change of temperature and/or frequency. The above correction parameters can all be measured by the device and method provided in Embodiments 3 and 4 and stored for later use.

The power calculation module 122 is used to obtain the target output power value according to the above-mentioned target gain value and the digital power value of the input signal, and obtain the actual output power value according to the above-mentioned correction parameter and the digital power value of the output signal, and obtain the actual output power value according to the target output power value and the actual The difference of the output power value obtains the gain correction amount; when selecting the correction parameter and the target gain value, the power calculation module 122 will obtain the corresponding target gain value according to the current power level, according to the current temperature and/or signal frequency in the storage module 123 Select the corresponding output power temperature correction parameter and/or output power frequency correction parameter from the stored correction parameter table.

When both the target gain value and the digital power value of the input signal in this embodiment are expressed in logarithms, the power calculation module 122 can obtain the target output power by calculating the sum of the target gain value and the digital power value of the input signal value, when the correction parameter and output signal digital power value in this embodiment are expressed in logarithm, here the power calculation module 122 can obtain the output power temperature correction parameter and/or the output power frequency correction parameter and the output signal digital The sum of the power values can get the actual output power value.

The above-mentioned power operation module 122, output digital power detection module 132, and digital power detection module 100 can be implemented by CPU, FPGA or ASIC respectively, and of course the output digital power detection module 132, digital power detection module 100 and power operation module 122 can also share one FPGA or CPU or ASIC to achieve.

The gain control module 121 is configured to adjust the gain of the above-mentioned radio frequency signal according to the above-mentioned gain correction amount; the gain control module 121 can be realized by an adjustable gain amplifier device.

Embodiment 1 of the present invention uses a feedback receiver and an output digital power detection module to perform digital detection at the output of the transmitter, which overcomes the average effect of analog detection in the prior art, and can achieve the effect of real-time power detection, thereby realizing real-time gain Correction; further, due to the introduction of correction parameters (frequency correction parameters and/or temperature correction parameters), it can ensure that the gain of the downlink channel is stable within the set operating temperature and/or frequency range.

Embodiment 2 of the present invention relates to an automatic gain correction method, as shown in FIG. 2 , including the following steps:

S110: Obtain the digital power value of the input signal according to the baseband signal;

The baseband signal is a digital signal, and its digital power value can be measured by the digital power detection module in Embodiment 1. In this embodiment, the baseband signal is the input signal, and the digital power value of the input signal is the digital power value of the baseband signal.

The digital power in this step (that is, the power of the digital domain signal) is defined as the average power of the signal relative to the full-scale peak power, expressed in logarithm, and the unit is dBFS.

The formula is described as follows:

X＝10×log10 (signal linear average power/full scale power)

For N-bit signed numbers, or N-1-bit unsigned digital signals s(n):

Full scale power = (2^(N-1))^2

Signal linear average power = mean(s(n)^2)

In the above formula, mean() is the average function.

For N-bit signed numbers, or N-1-bit unsigned digital I-channel and Q-channel signals:

Signal linear average power = (I line average power + Q line average power)/2

Full scale power = (2^(N-1))^2

Taking the baseband signal as s(n) as an example, a measurement period can be set to periodically detect the digital power of the baseband signal, and the number of bits of the baseband signal received within the detection period is N. The measurement cycle can be changed according to specific needs, thereby adjusting the accuracy of the measured digital power value, for example, reducing the measurement cycle can increase the accuracy and real-time performance of the measured digital power value, and vice versa.

S120: Obtain the digital power value of the output signal according to the amplified radio frequency signal;

The baseband signal becomes a radio frequency signal through a series of signal processing of the transmitting channel of the transmitter, and is output after being amplified, and the measurement of its digital power value can be specifically divided into the following steps (the above signal processing can be completed by the signal processing module in Embodiment 1, the amplifying The output can be completed by the power output module in embodiment one, and the digital power value measurement can be completed by the output power digital detection module in embodiment one):

A1: Restore the above-mentioned amplified RF signal to a baseband signal;

The radio frequency signal can be received by the feedback channel receiver coupled to the transmission channel in the first embodiment, and restored to a baseband signal.

B1: Obtain the digital power value of the output signal according to the restored baseband signal.

Utilize the digital power detection module in embodiment one to detect the digital power value of the baseband signal restored by the radio frequency signal, measure the digital power value of the output signal and measure the digital power value of the input signal to carry out synchronously, promptly the detection cycle of B1 step can be set It is set to be the same as the detection period of step S110, and the start and end points of the detection are aligned in time. In this embodiment, the digital power value of the output signal is the digital power value of the restored baseband signal.

S130: Adjust the gain of the radio frequency signal according to the digital power value of the input signal and the digital power value of the output signal. This step can be to obtain the gain correction amount according to the digital power value of the input signal and the digital power value of the output signal, and then adjust the gain of the radio frequency signal according to the gain correction amount, which can be specifically divided into the following steps:

A2: Obtain the target gain value and correction parameters;

The target gain value and correction parameters can be set in advance. The above target gain value is the estimated gain of the downlink channel to the signal, which is the ideal gain value desired by the downlink channel. Its value depends on the requirements of different power levels (by the decision) and the characteristics of the downlink channel, (the influence of the feedback channel power detection on the signal gain can also be taken into account) the target gain value storage data format can be a data table; the above-mentioned correction parameters include output power temperature correction parameters and/or output Power frequency correction parameters, there are different correction parameters corresponding to different temperatures and/or frequencies, the correction parameter storage data format can be a data table, and the correction parameters are used to correct output power changes caused by changes in temperature and/or signal frequency . The above correction parameters can be measured by the devices and methods provided in Embodiments 3 and 4 and stored in the storage module in Embodiment 1 for future use.

After setting the target gain value and the correction parameter table, the target gain value can be obtained according to the current power level; the corresponding correction parameters can be obtained according to the current temperature and/or the current output signal frequency, specifically, the output power temperature correction parameter can be obtained according to the current temperature, and /or obtain the output power frequency correction parameter according to the current output signal frequency, the above correction parameter can be obtained in a preset correction parameter table, and the above target gain value can be obtained in a preset target gain value table.

B2: Obtain the target output power value according to the above obtained target gain value and the above input signal digital power value;

When both the target gain value and the digital power value of the input signal are expressed in logarithms in this embodiment, the target output power value can be obtained by calculating the sum of the target gain value and the digital power value of the input signal.

C2: Obtain the actual output power value according to the above correction parameters and the above output signal digital power value;

When the correction parameter and the digital power value of the output signal in this embodiment are expressed logarithmically, the actual output power value can be obtained by calculating the sum of the correction parameter and the digital power value of the output signal here, such as The sum of the output power temperature correction parameter and/or the output power frequency correction parameter and the digital power value of the output signal obtains the value of the actual output power.

D2: Obtain the gain correction amount according to the difference between the above-mentioned target output power value and the above-mentioned actual output power value;

Steps A2 to D2 can be completed by the power calculation module and the storage module in the first embodiment.

E2: Adjust the gain of the above-mentioned radio frequency signal according to the above-mentioned gain correction amount. This step can be completed by the gain control module in the first embodiment.

Steps S110-S130 may be performed periodically, and the order is not in particular order.

In the second embodiment of the present invention, by adopting the digital detection of the feedback receiving channel at the output end of the transmitter, the average effect of the analog detection in the prior art is overcome, and the effect of real-time power detection can be achieved, thereby realizing real-time gain correction. Furthermore, due to the introduction of correction parameters (frequency correction parameters and/or temperature correction parameters), it can ensure that the gain of the downlink channel is stable within the set operating temperature and/or frequency range.

Embodiment 3 of the present invention relates to a transmitter correction parameter acquisition device, which is used to obtain the correction parameters used in Embodiment 1 and 2, as shown in FIG. 3 , including:

The output power digital detection module 230 is used to couple the radio frequency signal output by the transmitter, and obtain the digital power value of the output signal according to the radio frequency signal; in this embodiment, the digital power value of the output signal is the digital power value of the radio frequency signal output by the transmitter .

The output power analog detection module 210 is used to couple the radio frequency signal output by the transmitter, and obtain the analog power value of the output signal according to the radio frequency signal; in this embodiment, the analog power value of the output signal is the analog power value of the radio frequency signal output by the transmitter , when the duty ratio of the output signal is not 100%, the output analog detection module can convert the measured analog power value according to the actual signal duty ratio, and use the converted value as the analog power value of the output signal, the output power The analog detection module 210 can be implemented with an analog power meter.

The correction parameter calculation module 220 is used to obtain correction parameters according to the digital power value of the output signal and the analog power value of the output signal; it is connected to the digital output power detection module 230 and the analog output power detection module 210 respectively.

The correction parameters may include output power temperature correction parameters and/or output power frequency correction parameters, and different temperatures and/or signal frequencies correspond to different output power temperature correction parameters and/or different output power frequency correction parameters.

In this embodiment, the value of the correction parameter is the difference between the analog power value of the output signal and the digital power value of the output signal minus the difference between the analog power value of the output signal and the digital power value of the output signal at the reference temperature and reference frequency (the above power values are all logarithmic expression), the reference temperature can be set as the average temperature of the transmitter during normal operation, and the reference frequency can be set as the intermediate frequency point of the transmitter output. The correction parameter calculation module 220 may store the difference between the analog power value of the output signal and the digital power value of the output signal acquired at the reference temperature and reference frequency.

The output power digital detection module 230 can also include:

The feedback channel receiver 231 is used to restore the radio frequency signal coupled from the transmitter into a baseband signal;

The output digital power detection module 232 acquires the digital power value of the output signal according to the restored baseband signal. In this embodiment, the digital power value of the output signal is the digital power value of the restored baseband signal. The digital power detection module 232 can be realized by FPGA or ASIC.

The detection of the output power digital detection module 230 and the output power analog detection module 210 are performed synchronously, the detection period is the same, and the start and end points of the detection time are aligned with each other.

The transmitter correction parameter acquisition device described in the third embodiment, by setting the output power digital detection module and the output power analog detection module in the output section of the transmitter, the correction parameters obtained can effectively compensate for temperature changes and Transmitter power control errors caused by/or frequency changes (especially used to correct errors caused by the output power detection module being affected by temperature and/or frequency changes), to ensure that within the set frequency and/or within the set temperature range Consistency of output power.

Embodiment 4 of the present invention relates to a method for acquiring correction parameters of a transmitter, as shown in FIG. 4 , including the following steps:

S210: Obtain the digital power value of the output signal according to the radio frequency signal output by the transmitter;

Measuring the digital power value of the RF signal output by the transmitter can be divided into the following steps:

A3: Restore the above radio frequency signal to a baseband signal;

In this embodiment, the radio frequency signal can be received by the feedback channel receiver coupled to the transmission channel of the transmitter as in the third embodiment, and restored to a baseband signal.

B3: Obtain the digital power value of the output signal according to the restored baseband signal.

The digital power detection module in Embodiment 3 can be used to detect the digital power value of the baseband signal restored by the radio frequency signal. Here, a measurement cycle can be set to periodically detect the digital power of the baseband signal, which can be changed according to specific needs. The measurement cycle is used to adjust the accuracy of the measured digital power value. For example, reducing the measurement cycle can increase the accuracy and real-time performance of the measured digital power value, and vice versa. In this embodiment, the digital power value of the output signal is the digital power value of the restored baseband signal.

S220: Obtain the analog power value of the output signal according to the radio frequency signal output by the transmitter;

In this embodiment, the analog power value of the output signal is the analog power value of the radio frequency signal output by the transmitter, which can be obtained by measuring the output power analog detection module coupled with the transmitter transmission channel as described in the third embodiment.

S230: Acquire a correction parameter according to the digital power value of the output signal and the analog power value of the output signal.

The correction parameters may include output power temperature correction parameters and/or output power frequency correction parameters, and different temperatures and/or signal frequencies correspond to different output power temperature correction parameters and/or different output power frequency correction parameters.

In this embodiment, the value of the correction parameter is the difference between the analog power value of the output signal and the digital power value of the output signal minus the difference between the analog power value of the output signal and the digital power value of the output signal at the reference temperature and reference frequency (the above power values are all logarithmic expression), the reference temperature can be set as the average temperature of the transmitter during normal operation, and the reference frequency can be set as the intermediate frequency point of the transmitter output.

For example, when obtaining output power temperature correction parameters corresponding to different temperatures, the operating temperature of the transmitter under test (transmitter as described in Embodiment 1) can be adjusted stepwise from -25°C to +60°C (this step can be performed in It can also be carried out in the temperature test chamber, or it can be realized by the temperature control equipment of the transmitter itself, and the temperature measurement range can also be adjusted according to the specific situation). For intermediate frequency points, repeat the above steps S210-S230 at different temperature points to obtain output power temperature correction parameters corresponding to different temperatures, and these parameters can be directly stored in the storage unit of the transmitter as described in Embodiment 1 (here The linear interpolation step of the time data can be completed by the power operation unit), of course, these parameters can also be linearly interpolated and then stored in the storage unit.

When obtaining the output power frequency correction parameters corresponding to different frequencies, the output frequency of the transmitter under test (transmitter as described in Embodiment 1) can be adjusted step by step from the low frequency point to the high frequency point, and in the process, it can be turned off The gain automatic correction function of the above-mentioned transmitter, and set the working temperature of the transmitter as the reference temperature. Repeat the above steps of S210-S230 at different frequency points to obtain output power temperature correction parameters corresponding to different frequency points, and these parameters can be directly stored in the storage unit of the transmitter as described in Embodiment 1 (at this time, the data The linear interpolation step can be completed by the power calculation unit), and of course these parameters can also be linearly interpolated and then stored in the storage unit.

The transmitter correction parameter acquisition method described in Embodiment 4 obtains the digital power value of the output signal and the analog power value of the output signal by performing digital detection and analog detection on the radio frequency signal output by the transmitter, and then obtains the correction parameters, which can effectively compensate for the Transmitter power control errors caused by temperature changes and/or frequency changes (especially used to correct errors caused by the output power detection module being affected by temperature and/or frequency changes), ensuring that the set frequency and/or set Consistency of output power over temperature.

The above embodiments of the present invention overcome the average effect of analog detection by adopting the digital detection of the feedback receiving channel at the output end of the transmitter, and can achieve the effect of real-time power detection, and further realize real-time gain correction. Further, the acquisition and use of the correction parameters (output power temperature correction parameters and/or output power frequency correction parameters) also ensures the consistency of the output power of the transmitter within the set frequency and/or within the set temperature range.

The above disclosures are only a few specific embodiments of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (7)

1. A gain automatic correction transmitter, characterized in that, comprising: Input digital power detection module, signal processing module, power output module, output power digital detection module; The input digital power detection module is used to receive a baseband signal, acquire a digital power value of the input signal according to the baseband signal, and output the baseband signal; The signal processing module is used to process the baseband signal from the input digital power detection module and output a radio frequency signal; The power output module is used to amplify and output the radio frequency signal from the signal processing module, and according to the digital power value of the input signal obtained by the input digital power detection module and the digital power value of the output signal obtained by the output power digital detection module, adjusting the gain of the radio frequency signal; The output power digital detection module is used to couple the radio frequency signal from the power output module, and obtain the digital power value of the output signal according to the radio frequency signal; Among them, the power output module includes: A storage module for storing target gain values and correction parameters; A power calculation module, configured to obtain a target output power value according to the target gain value and the digital power value of the input signal, obtain an actual output power value according to the correction parameter and the digital power value of the output signal, and obtain the actual output power value according to the The difference between the target output power value and the actual output power value obtains a gain correction amount; a gain control module, configured to adjust the gain of the radio frequency signal according to the gain correction amount; The correction parameters are used to correct changes in output power caused by changes in temperature and/or signal frequency. 2. gain automatic correction transmitter according to claim 1, is characterized in that, output power digital detection module comprises: a feedback channel receiver, configured to restore the radio frequency signal coupled from the power output module to a baseband signal; The output digital power detection module acquires the digital power value of the output signal according to the restored baseband signal. 3. The automatic gain correction transmitter according to claim 1 or 2, further comprising: The output power analog detection module is used to couple the radio frequency signal output by the transmitter, and obtain the analog power value of the output signal according to the radio frequency signal; A correction parameter calculation module, configured to obtain a correction parameter according to the digital power value of the output signal and the analog power value of the output signal, and provide the correction parameter to the storage module. 4. A gain automatic correction method is characterized in that comprising: Obtain the digital power value of the input signal according to the baseband signal; Obtain the digital power value of the output signal according to the amplified radio frequency signal; adjusting the gain of the radio frequency signal according to the digital power value of the input signal and the digital power value of the output signal; The adjusting the gain of the radio frequency signal according to the digital power value of the input signal and the digital power value of the output signal specifically includes: Obtain the target gain value and correction parameters; Acquiring a target output power value according to the target gain value and the digital power value of the input signal; Acquiring an actual output power value according to the correction parameter and the digital power value of the output signal; Acquiring a gain correction amount according to the difference between the target output power value and the actual output power value; adjusting the gain of the radio frequency signal according to the gain correction amount; The correction parameters are used to correct changes in output power caused by changes in temperature and/or signal frequency. 5. The method according to claim 4, wherein said obtaining the digital power value of the output signal according to the amplified radio frequency signal specifically comprises: restoring the amplified radio frequency signal to a baseband signal; The digital power value of the output signal is obtained according to the restored baseband signal. 6. The method according to claim 4, characterized in that, obtaining the target gain value and correction parameters is specifically: Obtain the target gain value according to the current power level; Obtain corresponding correction parameters according to the current temperature and/or current output signal frequency; The correction parameters include output power temperature correction parameters and/or output power frequency correction parameters. 7. The method according to claim 4 or 5, further comprising: Obtain the analog power value of the output signal according to the RF signal output by the transmitter; The correction parameter is acquired according to the output signal digital power value and the output signal analog power value.

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